Virus in Linux



Virus and bugs are known to destroy any superior programming or development work done by world’s known programmers. When a team of programmers take up a project and start working on it, then along with other warranties they often offer three months errors, bugs and viruses warranty to their customers. Similarly, Linux virus exists and can cause severe damage to Linux programming. But Linux viruses are less in number as compared with viruses of other programming languages and they can be counted on fingers. Some Linux viruses are presented to make you realistic about this programming system and to improve your security. Linux Operating system is considered one of the best and virus fee operating system but it does not mean that Linux is absolutely virus free programming system.

Research work has proved that ELF Linux viruses can be technically resolved either they are prependers or regular file infectors that can cause problems to real host code. The first virus in Linux out of the small list of Linux viruses is Alaeda (virus.Linux. Alaeda) and it is a non-resident virus that cause damage to the ELF format files. ELF gives support to 32 bit objects and 64 bit objects and before infecting, the machine which is infected will be examined properly and when the file is infected it modifies the entry point and then it transfers control to the infection routine. The other list of viruses that effect the Linux programming include Badbunny, OSF, Vit Virus, Staog, Bliss, Winter.341, Zipworm, Satyr, Ramen Virus, Koobface, Kaiten and Rike.

Badbunny specifically targets the open source office package and this new worm in OpenOffice can damage Windows, Linux, and Mac OS X systems according to the advisory of response by Symantec security. OSF is a type of virus which can badly affect the backdoor ability of the Linux systems and badly affects its ELF executables. Once it enters in the system, it badly affects the files available in the current directory. The virus is non destructive but if it run from a root account then it can infect the files from the /bin system directory alongside existent directory which can cause problem to the system. Vit virus is known as famous cross platform virus which is non residential parasitic in its nature. This virus only causes damage to the files and directories that are declared as writeable for a username with tight security of Linux.

Staog was known as the first virus running on Linux systems and this virus operates by exploiting vulnerabilities in kernel and it stays as a resident virus in the memory. Unlike other Linux viruses, Bliss is another damaging virus which can cause bad impact to Linux systems and this virus has never gained widespread popularity. This virus is classified as very controversial and it confuses a worm or torjan. Winter, Zipworm, Satyr and Ramen Viruses are also small level viruses and they can cause less damage to ZIP archives, ELF files and even non-memory resident parasitic. Out of all these viruses, worm/virus is very complex and it can spread widely with computer network. This virus exploits three distinguishing type of vulnerabilities including wu-ftpd, rpc.statd and lpd service and it is expanded through brute force techniques.