1. Symantec/
  2. Security Response/
  3. Trojan.Nullbot


Risk Level 1: Very Low

September 9, 2002
February 13, 2007 11:40:22 AM
Also Known As:
W32/NullBot [Security Focus]
Trojan Horse
Systems Affected:

Trojan.Nullbot is an IRC Trojan that allows a hacker to gain control of the infected computer. It is written in the Microsoft C programming language and may be compressed two times with UPX and ASPack.

NOTE: This threat includes several variants. Symantec antivirus products may detect some of the variants as IRC Trojan.

Antivirus Protection Dates

  • Initial Rapid Release version September 10, 2002
  • Latest Rapid Release version March 3, 2008 revision 035
  • Initial Daily Certified version September 10, 2002
  • Latest Daily Certified version March 3, 2008 revision 037
  • Initial Weekly Certified release date September 11, 2002
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Yana Liu

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2016 Internet Security Threat Report, Volume 21
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