Content

W32/Virut.a

Type
Virus
SubType
Win32
Discovery Date
05/12/2006
Length
Minimum DAT
4761 (05/12/2006)
Updated DAT
5141 (10/15/2007)
Minimum Engine
5.1.00
Description Added
05/12/2006
Description Modified
01/30/2007 3:52 PM (PT)
Risk Assessment
Corporate User
Low
Home User
Low

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Characteristics

WhenW32/Virut.a is executed it injects it's code into all running processes

W32/Virut.a opens up backdoor at port 65520  on the compromised machine.

This virus tries to connect to IRC servers located at :

  • proxima.ircgalaxy.

Symptoms

  • Modified executable files (increase of 5,120 bytes of exe files)
  • DNS queries to proxima.ircgalaxy.pl and IRC related network traffic
  • Method of Infection

    W32/Virut.a is a file infecting virus. Infection starts with manual execution of the binary. Executables in network shares may also get infected if accessed by the compromised machine. This virus can also be instructed to scan for vulnerable systems and infect them.

    Removal

    All Users:
    Use specified engine and DAT files for detection and removal.

    Additional Windows ME/XP removal considerations

    Variants

    Variants

      N/A

    All Information

    Overview -

    W32/Virut.a is an appending virus.  This file infector infects .exe and .scr files by attaching its encryted code to the end of the file.

    The encrypted code contains IRCBot functionality.

     

    Characteristics

    Characteristics -

    WhenW32/Virut.a is executed it injects it's code into all running processes

    W32/Virut.a opens up backdoor at port 65520  on the compromised machine.

    This virus tries to connect to IRC servers located at :

    • proxima.ircgalaxy.

    Symptoms

    Symptoms -

  • Modified executable files (increase of 5,120 bytes of exe files)
  • DNS queries to proxima.ircgalaxy.pl and IRC related network traffic
  • Method of Infection

    Method of Infection -

    W32/Virut.a is a file infecting virus. Infection starts with manual execution of the binary. Executables in network shares may also get infected if accessed by the compromised machine. This virus can also be instructed to scan for vulnerable systems and infect them.

    Removal -

    Removal -

    All Users:
    Use specified engine and DAT files for detection and removal.

    Additional Windows ME/XP removal considerations

    Variants

    Variants -

      N/A