To date, viruses, trojans and all kinds of malware are the most serious and common problem are viruses. Even the users of the Windows 8 Operations are not insured, despite the improved security system.
However, many users are interested in the presence of viruses on other operatingors, such as Mac OS, Android, IOS, as well as Linux.
Not every malicious software was developed for Windows Operations, however, their large number. Samoa the main reason This is the widespread distribution of this system, however, this is not the only indicator. While developing security was not a priority criterion in the OS.
To date, in terms of installing Windows applications, Windows has a kind of behavior. You can search required programs On any sources on the network that can not always be reliable, and install them. Other Operations have their own shops that provide proven software.
It is worth noting that Windows 8 has its own software store, but the most necessary applications for the computer users still download from different sites on the Internet.
Apple Mac OS X
Taking into account the above, it can be noted that most of the malicious
Elements are intended for Windows, and they cannot be used on Mac. However, viruses for the MAC Operations exist, although they are much less common. Basically, the computer is infected through the java supplement in the browser, when installing hacked utilities and other methods.
In the new versions of the Mac OS X Operations, the installation of various software occurs through Mac App Store.. If you need to work with a certain, you can find it in the store's store. At the same time, you can confidently download applications without fearing for the safety of the computer, since they are definitely no viruses and malicious elements. This eliminates the need to search for the necessary utilities on the Internet.
In addition, the operator has GateKeeper and XProtect technologies. The first is designed to block the launch of programs that do not have a special signature. The second is antivirus that checks all the applications open to the presence of maliciousness.
This means that there are viruses for the Mac Operations, but they significantly appear much more than for Windows, and the probability of infection is lower, since completely different principles are used when installing applications.
In addition, viruses and malicious elements exist for Android OS, and antiviruses have been developed to combat them. But it is necessary to take into account the fact, Android is the most protected opera. Download and install programs are allowed only from Google Play.In addition, in the store itself, applications are checked for viruses in them.
However, the user can disable the forced installation of applications only from Google Play and download them from other resources, but when prepare Android 4.2 and above will be proposed to check the downloaded game or program.
In general, if you do not download hacked programs for Android, but to apply only Google Play, you can be confident in the safety of your device. In the same way, stores can be considered sufficiently safe. sAMSUNG programs, Opera and Amazon.
This operating system is considered even more protected than Mac OS and Android. This means that when using iPhone, iPod or iPad and download programs from Apple App. Store the ability to get a virus almost zero. This was managed to achieve the special demands of the store to developers, so all applications are checked in manual mode.
In 2013, studies were conducted during which it was revealed that it is possible to bypass the procedure for checking viruses when posting applications to Apple Store and implement a malicious element. But when the Apple virus detects, all malware on each user device with the IOS Operation may eliminate. It is worth noting that Microsoft and Google can remotely delete installed applications from their stores.
Malicious software developers practically do not work towards Linux OS, since this OS is not so popular among users. In addition, users of this series are much more experienced than users of other OS and most of the simple methods for the spread of malicious elements do not pass with them.
However, viruses for this operating system exist. You can get infected with viruses when downloading applications from dubious resources or receiving email letters, but they need to be discovered that it is unlikely.
During 2012, MAC users collided with harsh truth, exposing MAC computers security myths:
- In early 2012, FlashFake was discovered, consisting of 700,000 computers running operating mAC systems OS X.
- During 2012, cybercriminals have repeatedly used malicious software for Mac in target attacks. The reason for this is the big popularity of Apple products in many prominent businessmen and influential politicians. Information stored and transmitted from / on computers of these users is of interest to a specific category.
Today it is recognized that for Mac (or malware for Apple) is a major threat to user and information computers.
The increase in the amount of threats, viruses and malicious software for Mac
The number of elements of malicious software for Mac grows with a rapid pace:
- In 2012, Anti-virus experts "Kaspersky Labs" created 30% more signatures for the detection for Mac (compared with the 2011 indicator).
- As compared 2010, the number of signatures created annually increased six times.
Top 10 Malicious Programs for Mac OS X - For the Wide Half of 2012
Flashfake was the most serious threat in the first half of 2012, and the following is a list of Top 10 malware for OS X, which were especially popular in the afternoon:
|
Name |
% of the total attacks |
|
| Trojan.osx.fakeco.a. | ||
|
Trojan-downloader.osx.jahlav.d. |
||
|
Trojan-downLoader.osx.flashfake.Ai. |
||
|
Trojan-downloader.osx.favdonw.c. |
||
|
Trojan-downloader.osx.favdonw.a. |
||
|
Trojan-downloader.osx.flashfake.ab. |
||
|
Trojan-FakeAv.osx.defma.gen. |
||
|
Trojan-fakeav.osx.defma.f. |
||
| Exploit.osx.smid.b. | ||
|
Trojan-downLoader.osx.flashfake.af. |
Excellent article on viruses for Mac OS X, from the same author, which for some time ago wrote a note about what it is - to be a mailer.
The current article is interesting because simple language And at the level of common sense, and at the same time, without fanaticism, explains the current situation with malicious applications for Mac OS X. Article is recommended for reading, memorization, as well as to Forward for those who will argue that under the poppy "full of viruses".
True on viruses
Wander on the Internet in search of information about what actually happens with malicious programs (viruses, trojans, worms, and other harmful software) for poppy, and you will be stumbled upon the roasters of hot discussions, sewers and extremely convenient statements about the "end of the world ", Issued by anti-virus software manufacturers.
The problem is that there are very few places where it is possible to study material for malicious software for poppies. But for many years I have been engaged in the "deep" study of operating systems, so I decided to fill this gap.
Before I proceed to the listing, I must say that I use the poppy about 4-5 years, and before that I worked closely with Windows and DOS. It must be said that I have not failed enough for a long time with malicious programs on any of the platforms.
This is how things are with malicious software on Mak:
01 There is nothing that it is impossible to break
As long as the computers have some kind of contact with the outside world, and people create programs for them, there is a possibility that some malicious software will fall on the computer. Some source code may be safer than another code, but there is nothing that it could not be hacked (at least in the realities of consumer software).
02 In the past, Makov had viruses
Before the appearance of OS X, there was a certain amount of viruses that could infrarable magicians and make all sorts of unpleasant things with them, because of which their owners were writhing in terrible cramps. However, the fact that Mac OS was completely rewritten when moving to OS X, led to the fact that all these old viruses cannot inflict modern poppies.
03 on this moment, your poppy safe
At this particular point in time, there is no malicious software in free circulation, which might infect your poppy. No viruses, no Trojanov, no text loggers, no botnets, nothing. You can wander over the network, read email, chat in instant messaging systems before planning, and nothing harmful will happen to your computer. However, there is a potential possibility that tomorrow morning someone will release a virus that will take advantage of an unknown vulnerability in OS X, and to dinner it will destroy data on all Macs in the world connected to the network.
04 There are Malicious Concepts
Yes, some managed to create pieces of code, which can harm Mac, but these things have not yet fallen into the "open world" and on Maks in "real life." And yes, many of them demanded in some kind of mysterious movements in order to really apply some harm to your computer. But they exist, somewhere on this planet, right now.
05 Mac OS X definitely have errors
Most malicious software works through the use of software errors in the computer operating system. And Poppy has its own proportion of errors, for the correction of which (as a rule, the most revealed or noticeable) Apple periodically releases the operating system updates. However, today errors in Mac OS X have not been sufficiently fruitful soil for malware developers.
06 UNIX inside definitely helps
Inside the Mac OS X is the UNIX version, and from above - a large number of code written by Apple, for all system services and the visual shell with which you work. This version of UNIX in the "Real World" has been used for a long time, and has become very safe, as many mistakes have long been found and corrected over all these years.
07 Availability of Intel Pictures does not change
Someone can worry about the fact that the transition to Intel processors can make poppies less secure, since malware for Windows is designed for use on intel processors (and compatible with them). It is unlikely, since malware is usually written using vulnerabilities in the operating system, and not for the processor. However, this is a new approach, and it is quite possible that in this time someone in its basement comes up with such a way.
08 market share does not matter
It often claims that there are no viruses for poppies because they are a small part of the market. To some extent, it may be true. If you write a malicious program - especially if this is part of the profit of the botnet or network by sending spam - or you want to make a name yourself, you will probably be aimed at the largest share of computers. However, many developers of such programs also love fame, and what could be more interesting: write another 147 281th virus for Windows or write the first supervirus for poppy? Someone will surely want to give good pink guy "Hi, I am Mac."
09 In writing a maliciously involved in big money
Most of the "harmful" programs are currently used for two purposes: either capture information from your computer (for example, collecting user names and passwords during the entry to the Bank's website), or the creation of huge networks from thousands (or tens of thousands) computers to generate Spam and participate in DDOS attacks on various websites. In any case, there are big money there, and it is managed all far away. And when the economic sense appears to aim on Apple users, they will definitely be under the sight.
10 Anti-virus software manufacturers for poppies?
Here I am a little puzzled. On the one hand, you spend your hard-earned money on the program to protect yourself against something that does not actually exist. However, on the other hand, you get two advantages: a) with a suitable program you will avoid transmission of viruses for Windows from one stupid user to another; and b) when the real Mac virus will finally appear, you will already have a ready-made infrastructure to reflect the attack, provided that you regularly update the database of viruses descriptions and the company has released an update for this virus.
And how am I ask? Without any viral software, but I do a daily backup just in case.
Although Windows is widespread everywhere, there are many alternative operating systems for corporate and home users, and their popularity is gaining momentum. However, it turns out that alternative OS is not as safe as many consider.
Readers of specialized Internet publications and visitors of IT-forums know: as soon as the message about the new Trojan appears, voices are immediately distributed: "Linux does not threaten this"! It should be recognized that in 99% of cases this is true: the overwhelming majority of malicious programs discovered today (more than 2 million) are designed for Windows. Against this background, Linux for which only 1898 malicious programs has been found, it looks relative to a secure environment. As for the OS X (Apple operating system) - for it, only 48 malware has been discovered.
How it all began
In the early 1970s - long before Microsoft's appearance - the Creeper virus was created, which infected computers that were running the Tenex OS. It can be said that this virus was ahead of his time because he spread through Arpanet - the predecessor of today's Internet. In 1975, the Pervade virus, written for univac systems and intended for the distribution of the Animal game, came to change Creeper. Finally, in 1982, the Apple turns, whose users faced the Elk Cloner virus written by Rich Skrenta. This virus was distributed using a floppy disk and caused system failure. Four years later, C64 users were injured: the virus called BHP (as believed by the Bayerische Hacker Post created by the German hacker group) caused the screen flicker on which the following message appeared: "Hallo Dickerchen, Dies IST Ein Echter Virus!" ("Hi, fat man, this is a real virus!"). Text greetings followed serial numberwhich increased by one with each new infected computer. The virus also intercepted interrupts, which allowed him to survive the reboot of the system.
The first malicious program for MS-DOS appeared in 1986. Fortunately, the brain bootable code contained the names, addresses and phones of its authors. At first, the Amzhad brothers and Basit Farouqu Alvi (Amjad and Basit Farooq Alvi) argued that they created a virus to assess the level of computer piracy in India. However, subsequently, viruses had to admit that they have lost control over their experiment.
In subsequent years, many viruses were written, and soon it turned out that they exist practically for all operating systems. So, for Commodore Amiga, more than 190 malicious programs were created. For Atari ST, two dozen of malware were written, including the C't virus (http://www.stcarchiv.de/am88/06_viren.php), which was published in the magazine C't in the form of text on assembler, so Readers could reproduce it on their own. This example is well illustrated by a calm attitude towards computer viruses, characteristic of that time.
Malicious monopoly
The era of the heyday of viruses, worms and other malware occurred when users' personal computers got access to the World Wide Web. Prior to this, malicious code could only be distributed through floppy disks; With the advent of the Internet, malicious programs - such as Melissa and Iloveyou - got the opportunity in a matter of minutes to overtake the entire globe. Another important factor was the unification of platforms: Malicious programs distributed via email were able to fully realize their potential (and become a significant threat to Internet users) only after Windows and Outlook occupied leading positions in the market software. The wide range of OS, typical of the home users sector in the 1980s, was changed by the predominance of MS-DOS and Windows. In addition, the emergence of the Internet led to the fact that malicious programs were able to keep in touch with their creators.
Previously, the spread of viruses and worms were cases of case, and their creators could not manage this process. Thanks to the Internet, it has an opportunity to steal data from a sacrifice computer or transmit a malicious program commands located on a remote hard disk. It created ideal conditions for the organization of DDoS-attacks and mass spam newsletters, and also presented cybercriminals an excellent opportunity to earn money, spreading malicious programs. Naturally, attackers are interested in making them harmful software infected as more computers. That is why millions of Trojans, daily sent by e-mail, Designed for Windows users - Malicious code for BEOS or Plan 9 would not allow cybercriminals to achieve the desired effect. Thus, there are alternative operating systems safer than Windows XP - a controversial question. Even if we assume the existence of an operating system, which is absolutely impossible to hack, on the hard disk of the user there is always more than enough applications whose vulnerabilities can be used for attack.
Current situation
Because of its leading position in the market windows platform became a standard target for malicious software. For Windows, it is written an order of magnitude more malware than for other OS. Types of malware created for Windows and other platforms are also very different from each other. In fact, it can be said that malware is divided into two parts: Windows programs for both OS.
Malicious programsThe Windows developed is most often designed to capture control over the sacrifice, and then use the latest for DDoS attacks and spam mailing. In addition, the attackers are trying to use a network worm, to infect as many computers as possible. Even if the user learns that his computer is infected, it will not be a disaster for cybercriminals: modern botnets are so great (for example, according to experts estimates, the Kido / Conficker botnet includes several million computers) that the loss of one zombie car does not affect on their effectiveness.
Malicious programs for UNIX-like systems have completely different goals. They remain unnoticed and steal credit card data from online stores or user passwords. Most often, not the Trojans are used for attack, but the well-known vulnerabilities of server services.
New "Friends" OS X
Until October 2007, malware for OS X, the Apple operating system was very small. Two exploit, four worm, one virus and one rootkit - all of them were created rather "in scientific purposes"And did not bring the authors for significant profits. However, this situation overnight has changed with the advent of OSX.rspluga.a - the first Trojan for OS X. As noted above, the Trojan spam-mailing to users other than Windows does not make much sense. Apparently, the creators of osx.rspluga.a were well understood, and therefore went to another way: they advertised on the forums of Mac users a certain "pornamet" on which, when trying to view the videos, a message appeared with the request to install the codec and, naturally, the proposal immediately download. In the process of installing "Codec" MAC users who are not less trusting than windows usersThe administrator password has been rampant. OSX.RSpluga.a then manipulated DNS records on their computers in such a way that many web addresses, including addresses of several banks, as well as EBAY and PayPal payment systems, were processed incorrectly, and the victims of the Trojan fell to phishing sites.
In mid-January 2008, the Finnish anti-virus company F-Secure reported on the first counterpart anti-virus for Mac. This free program reported the discovery of several malicious programs on computers, which were not actually infected. To remove the "detected" malware, the users were suggested to purchase full version Product. For Windows, such a type of fraud is not new - now cybercriminals decided to check how trusting Mac users.
No reason for panic
The reader may ask: Is it worth worrying at all? As the numbers show, in comparison with Windows-systems, any alternative OS is a quiet harbor. However, it should not be seduced: the Trojans do not need administrator rights to steal data or connect to its server through the 80th port. Linux-like systems are becoming increasingly popular, and their users should be ready for new threats.
Ultimately, the most serious threat to the security system represents the belief that it is invulnerable. Nowadays, even the computers sold in discount stores have pre-installed antivirus protection. However, many Linux users refuse to establish even free antivirus analyzers like ClamAV, claiming that they simply do not need them. In addition, high-performance open source solutions are available, in which technology such as Selinux and ApparMor are used, as well as intrusion detection systems. Those who do not use these decisions (believing that they are not needed, or not wanting to spend the forces and resources on their installation) are likely to remain in the ignorance when their computer will be captured by the criminal, driven by the harborn.
Protection of business
Commercial enterprises cannot afford such a luxury as a myth of their own security. Any server requires anti-virus protection - at least in order to ensure the security of numerous Windows network users.
To stop the attack at the gateway level, you should worry about network screens, intrusion detection and prevention systems. Regardless of whether server systems are installed or selected servers, when attacking the Linux / Unix-type gateway, such systems often act as the first protection line for the internal network. Properly configured network screen, in addition to the definition of available services and ensuring the first line of protection against hacker attackmay also prevent the distribution of self-changing malware (worms) through network connections. For example, to protect the network from the worm Lovesan.a, it is enough to block TCP ports 135 and 4444.
The network screen can also be used to minimize the damage. If there are infected computers in the network, port blocking prevents the establishment of connections with other computers with infected machines, and thus protects the system from maliciousness. To minimize the overall risk of infection, when setting up a network screen should be provided with a variety of infection and attack methods and how to clearly determine which services and ports will be considered trusted.
However, resourceful programmers found ways to bypass simple defense. For example, you can exchange packages using tunneling and trusted services, such as DNS and HTTP. For this reason, additional intelligent modules such as intrusion detection and warning systems, as well as network-level network screens, serve as a useful addition to classic network screens.
Proxy defender
Another way to protect is the installation of a proxy server, which deprives users of direct Internet access network. The presence of a proxy server not only reduces the volume of traffic, but also increases the safety level of the enterprise, since a significant part of malicious software is distributed through infected websites. Most often, the Squid proxy server is used in Linux / Unix networks, which offers its own identified ICAP interface (Internet Content Adaption Protocol, RFC 3507). At the same time, user requests are processed using RespMod technology (analyzes the objects requested by web servers) and Reqmod (scans the objects sent to web servers). Often, higher ("Parental") proxy servers are installed to scan HTTP and FTP traffic, such as HAVP (http://www.server-side.de). The so-called "transparent" proxy servers are also popular, which are easily integrated into the network. They are installed in front of the gateway (network screen) and do not require customer settings (browser). Technically, such a solution can be implemented, for example, by connecting the server by type "Bridge" from which the proxy server transmits requests to the content filter. Or a proxy server can receive HTTP queries, redirected from the network screen installed on the selected server; in small networks The proxy server can be built directly in the network screen (TransProxy). Both possibilities are easy to implement using standard Linux / Unix tools.
Of course, proxy servers are not able to guarantee absolute protection. Even very best antivirus Cannot open files protected by password. Proxy technologies are also limited when it comes to encrypted VPN connections.
Postal traffic protection
Postal messages remain one of the main ways to spread malicious programs. In large networks with a large number of users, the highlighted mail gateway is located in front of the mail server (Exchange, Lotus Domino et al.). Linux, UNIX (Solaris) or Derivatives (* BSD) systems with MTA (Mail Transfer Agents - postal transport agents), such as PostFix, Exim, Qmail or Sendmail are also used. They have their own filtering interfaces for viral scanners and spam filters. The so-called "double MTA" is the most common when each letter comes to MTA twice: first from a remote computer, then the letter is sent to the content filter for processing, after which it returns to MTA again.
Sendmail also offers an API API (Milter API), which assumes the installation of a filter consisting of several viral scanners and spam filters (usually two or three virus scanners and two spam filters) checking the postal traffic. The advantage of such a configuration is that the viral scanner can be installed on the selected machine, which reduces the load on the mailing gateway. Failover solutions are easily integrated into such a system - for example, cluster MTA and cluster content filter. Fully integrated cluster and fault-tolerant solutions, which are MTA and the content filter implemented in one system are also fairly often used. Internal mail servers benefit from the presence of filter systems installed in front of them, as it saves resources spent on the mail scan and storage of letters with malware and spam, as well as for the processing of post traffic with a large amount of the latter. For this reason, small companies should also think about installing such systems. Some manufacturers offer ready-made solutions that differ simplicity of management.
Protection of file servers
Data stored in in electronic formatOften, it is great value for the company, whether production plans, warehouse registers, etc. Personal data or information requiring special protection (employee lists, summaries of applicants, financial documents, etc.) are often stored on file servers, which must be reliably protected in order to prevent theft of data, their changes or espionage.
In many networks, along with Windows servers, alternative systems with SAMBA services are used. In such cases, integration is carried out using the VFS module (Virtual File System), which redirects the data stream to the viral scanner. In this case, the data is scanned "on the fly", i.e. When reading or writing.
For some alternative systems, there are also kernel modules (Linux, FreeBSD), which protect not only the Samba service itself, but all objects in the system. Such modules exist for NFS, as well as for FTP and web servers. The disadvantage of such solutions is that you need to make sure in advance in supporting the new core by modules, and after updating the kernel, the modules have to recompile.
Servers running alternative OS are very popular. Supplies AS / 400, Solaris, HP-US, IRIX and AIX, etc. include all starting from file Systems and database systems to special sectoral applications and finance management programs. Difficulties in finding a suitable protective solution are due not only to the choice of the operating system platform, but also a variety of processor architectures (SPARC, PPC, ITANIUM, ALPHA, MIPS, PA-RISC - in addition to Intel). If the protective solution for a particular system is not found, it should be isolated from the rest of the network to minimize the risk of infection. To do this, you can use divided networks with dedicated network screens, restricting access or intrusion detection and prevention system (IPS and IDC).
Changeable network landscape
99% of all client networks consist of computers working under windows control. However, workstations under control Linux, BSD and Mac OS X also need protection, since the ability to attack them completely exclude. To disseminate malicious programs, such carriers are used as CD and DVDs, floppy disks and zip discs. Flashki and external USB / FireWire discs are also circulated between systems, which gives malicious for another opportunity for distribution.
Another problem is that, along with workstations and laptops, smartphones and pocket computers are increasingly used today, which also need to be protected. In the networks of standard configurations, the threat source is obvious - this is the Internet. But today, system administrators and computer security specialists also have to engage in the protection of internal network nodes. And the fact that the variety of platforms is growing every day, only complicates this task. In addition to different windows versions Mobile, there are Symbian and Linux, as well as proprietary systems developed by various companies for their own purposes. Choose a protective software for such systems is difficult, and sometimes an impossible task.
Conclusion
The use of non-traditional technologies does provide some advantages in terms of security, but does not give any guarantees. For example, the "desktop" OS of Solaris can be considered a non-traditional, but its server version is rather standard, and therefore is also exposed to malware, like any other server. Those who cares about the safety of their data should ensure reliable protection of their computers regardless of the operating system used. In the ideal case, protection should provide several complementary technologies. But even then caution should be caution, since web applications are increasingly used, and not programs installed on local computer. As an example, you can bring forums and bulletins of ads with poorly organized protection: they easily fit the malicious HTML code, which allows XSS attacks regardless of the operating system installed on the user's computer. Summing up, it remains only to repeat again: Linux users, be vigilant!
General understanding of what is computer virusToday it is available to almost any PC user, regardless of the level of qualification.
Unfortunately, the relevance of the issues network security It will not lose its importance for a long time, since the development of technology does not always mean only constructive motives.
After all, there will always be those who prefer illegal methods in solving many issues related to communications.
What are viruses and what effect they can have
Computer viruses have received such a name by analogy with medical terminology. In the overwhelming majority of their impact on information system, Whether a customer computer, government servers, manufacturing equipment or military communications - always have negative consequences, damaging or by the protection of their protection and making unlawful actions. Without considering those cases where the use of viruses can be used as defensive or intelligence tactics, you can summarize their influence on the infected system by the following functions:
- theft of important information;
- violation of the functioning of protection for subsequent bypass;
- changing information to use the result for attacking and others.
Currently, there are many different classifications of malicious software, which is also a computer virus. They are divided, among others, according to such parameters:
- by distribution method;
- at the attachable goal;
- in programming language on which the virus program is created;
- according to operating systems, which infects the virus and other.
If we strongly summarize the process of creating a virus and its impact on the target, then the phased this procedure can be described as follows.
- The attacked system is studied and the most vulnerable sections are found.
- A program is created that uses the detected shaver in protection and uses it for scheduled purposes.
- Writing a program-virus, an attacker places it in the target information system (it can be email with attachment, file on removable media And even exotic methods such as SQL injections are a special way formed requests to a database that leads to a failure).
- Once in the system, the virus produces in advance its operation code - reads and sends data to an attacker, replaces information, destroys the elements of protection and so on.
Are there any viruses on Mac OS
Traditionally, in the medium of product admirers apple companies It is believed that this platform, including its versions for desktop computers, brand tablets and smartphones, is the least vulnerable among other popular operating systems presented in the consumer market. Viruses on Mac OS is really not too common, but nevertheless they have, as evidenced by both research and reviews of some users.
Despite the relatively reliable protection of computers running the Apple software platform and Mac OS security, then the case appears about the threats found for their safety. Most recently, safety experts were concerned. newest development Hackers called Thunderstrike and its subsequent modification - ThunderstRike 2. These are viruses in the form of exploits - utilities that are executed after entering the system.
The main problem in the case of such a virus was that it was not deleted even when reinstalling the system and affected the operation of the device hardwareClear the poppy from the viruses in it sometimes happens not so simple. Here it may not be easy to remove the program itself, which is not so easy to find, but even reinstalling the operating system.
Taking into account the rapid development of technologies, including the increase in the amount of malicious software, establish antivirus for Mac OS X will never be superfluous. Difficult to say which of the presented software protection for this system is coping with their tasks qualitatively, but when choosing a suitable software package Do not neglect such capabilities as:
- paid use. Most often, paid versions of antiviruses are much more functional and distinguished by the most recent malware bases;
- regular update. It allows you to get the latest information about threats and signatures;
- additional features - firewall, checking removable drives, protection of other devices on the network, other.
If you analyze the answer of users to the question "specify the best antivirus for Mac", then among the answers, the development of such companies as Avast, Sophos, Avira, Comodo is predominantly found.
Are there any viruses on iOS
Considering Apple Mac OS Platform Safety, it is not worthwhile to bypass and other children - popular tablets and smartphones managed by operating iOS system. Since there is a separate application store to search and install programs in this system, the viruses on iOS are even less common.
Accompanies this tough company policy regarding the selection of programs that can be downloaded to the store for subsequent sale or free Installation users. Each of them carefully checks the responsible employees of the company for location in them. malicious codecarrying a danger to the consumer.
As for protection against threats, which carry viruses on iOS, in addition to installing programs only from the official source, you can additionally progress - install Apad Anti-Virus and be confident in albeit not one hundred percent, but still reliable defense Your device.
What are viruses for android
Android platform is a comprehensive software infrastructure for devices such as smartphones, clocks, laptops, laptops, tablets, and even TVs with consoles. It includes not only the operating system of the same name, but also many web services. google companies - app store, post service, network search and more. It is based on the code of the popular operating room. linux systems and adapted Java technologies, in particular programming language and a virtual machine.
Much more open for third-party developers, the Android platform provides more opportunities for writing and distributing malware. The variety of viruses encountered for it can be submitted in the following categories, depending on the impact on the system:
- trojans or SMS Trojans. These are programs that are activated on the final device, send messages, including paid, on the number in advance numbers in their code. The consequences are a sharp decrease in the amount of money on the user's account;
- extortionists. Such utilities, penetrating into the user device, block the specific functions, offering subsequently the option of paid unlocking.
- spyware This version of the virus monitors the behavior of the user and accumulates personal data - correspondence, the history of visits, photo, the magazine of calls, and others with the goal of transferring an attacker;
- specific viruses - programs whose actions may not be sent to user privacy. For example, there were malicious programs that infect the smartphone or tablet, which automatically opened certain pages on the network and won their visits ratings;
- batnets. Not so much viruses as entire networks of computers infected with them, which subsequently coordinating a malicious program, use their total capacity for various purposes - attacks on other computers, data calculation, and so on.
The above classification of what viruses are on Android, does not cover all the existing types of them. With the advent of new services on the Internet, including paid, as well as the number of devices operating under the specified operating systemNew Android viruses arise.
Malicious programs under the Linux system
An open source code, as well as the numerous community of enthusiasts of this platform, equally contribute to the development of its safety and the emergence of malicious programs such as viruses under Linux. Their number is incommensurable that the windows operating platform differs and its varieties is different, but still you can often meet messages about the discovery of new vulnerabilities and programs that use them.
Linux viruses are still considered a rare phenomenon, and their number growth has in recent years associated with an increase in platform varieties and a large number of different distributions, many of which are created by small user groups. Their action on the system is practically no different from such programs for other systems:
- penetrate and disable the security system;
- delete user data;
- collect information by sending an attacker and other functions.
But taking into account much popular Windows among end users, the number of viruses for Linux is much less due to the difference in the number of users.
Important! Easy and efficient rules will help to significantly increase the level of security. First, do not trust suspicious sources of installation files - forums, torrent trackers and file hosting, and enjoy only the official distribution channels of programs. The latter includes site development sites and app stores. Secondly, never run files that have come from the general channels of use - mail, social networks etc. Exception only if you trust the sender entirely. Thirdly, install antivirus and desirable that developer, which is recommended by authoritative sources.
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Now you know what viruses are on iOS, Mac OS, Linux, Android. If you have any questions, write in the comments.