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:

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 September 10, 2017 revision 021
  • Initial Daily Certified version July 22, 2004
  • Latest Daily Certified version September 11, 2017 revision 002
  • 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

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STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
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