W32.Gaobot.AFJ is a worm that spreads through open network shares, backdoors that the Beagle and Mydoom worms install, and several Windows vulnerabilities, including:
The worm can also act as a backdoor server program and attack other systems. Additionally, the worm attempts to stop the process of many antivirus and security programs.
A variant discovered on May 12, 2004 attempts to spread using W32.Sasser.Worm. It does this by injecting code into the "avserve.exe" process, so that when the Sasser worm attempts to propagate, it sends Gaobot to the remote system instead of Sasser. This variant creates a file named "wormride.dll" in the System directory.
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