Name :	Backdoor:W32/Agobot
Category:	Malware
Type:	Backdoor
Platform:	W32

A remote administration utility which bypasses normal security mechanisms to secretly control a program, computer or network.

F-Secure Anti-Virus can disinfect a computer infected with Agobot automatically by renaming the backdoor's file. A computer has to be restarted to complete disinfection.

Special Disinfection Utility

F-Secure provides the special disinfection utility to eliminate Agobot backdoor infection. You can download this utility from our ftp site:


The unpacked version is available here:


Disinfection instructions can be found here:


Manual Disinfection

Manual disinfection for Agobot backdoor requires renaming of an infected file, usually located in Windows or Windows System folder and restarting a system. Please note that the backdoor's file may have read-only, system and hidden attributes, so Windows Explorer has to be configured to show such files.

If the infection is in a local network, please see Removal Instructions.

Agobot is an IRC-controlled backdoor with network spreading capabilities.

When spreading it can exploit several vulnerabilities:


RPC/DCOM and RPC/Locator is used when the worm tries to spread automatically.

Other spreading methods like the WebDAV exploit can be activated through IRC commands.

The Agobot.f variant was reported by several customers in the beginning of September 2003. This backdoor has functionality similar to previous variants. The description of Agobot.f can be found here: http://www.f-secure.com/v-descs/agobot_f.shtml

This backdoor variant is functionaly similar to the previous variants, but it is more powerful than earlier versions. The description of Agobot.AX is available here: http://www.f-secure.com/v-descs/agobot_ax.shtml

The Agobot.p variant was reported by several customers in the middle of October 2003. This backdoor has functionality similar to previous variants. The description of Agobot.p can be found here: http://www.f-secure.com/v-descs/agobot_p.shtml

The Agobot.q variant was reported by several customers in the middle of October 2003. This backdoor is a minor variant of Agobot.p, so it has very similar features. The description of Agobot.q can be found here: http://www.f-secure.com/v-descs/agobot_q.shtml