Backdoor.Agent.B

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.

Protection

• Initial Rapid Release version July 22, 2004
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version July 22, 2004
• Latest Daily Certified version August 20, 2008 revision 016
• Initial Weekly Certified release date July 28, 2004

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

• Wild Level: Medium
• Number of Infections: 50 - 999
• Number of Sites: More than 10
• Geographical Distribution: Low
• Threat Containment: Moderate
• Removal: Moderate

Damage

• Damage Level: Low

Distribution

• Distribution Level: Low