1. Symantec/
  2. Security Response/
  3. Backdoor.Agent.B


Risk Level 2: Low

July 21, 2004
February 13, 2007 12:25:34 PM
Also Known As:
BackDoor-CFB [McAfee], TROJ_AGENT.AC [Trend], Troj/Agent-AC [Sophos], Agent.E [Panda], Backdoor.Agent.ac [Kaspersky]
Trojan Horse
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

Backdoor.Agent.B is a backdoor that installs a .dll file when a user visits certain malicious Web sites. The .dll file allows other malicious programs to perform various actions.

This backdoor is packed with UPX.

Note: Virus definitions dated prior to July 22, 2004 may detect this threat as Backdoor.Trojan.

Antivirus Protection Dates

  • Initial Rapid Release version July 22, 2004
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version July 22, 2004
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date July 28, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Kevin Ha

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
  • Twitter
  • Facebook
  • LinkedIn
  • Google+
  • YouTube