Windows 2003/XP/2000/NT/ME/98/95/3.X

Gaobot.QJS is a worm that spreads by copying itself, without infecting other files.

It affects productivity, preventing tasks from being carried out:

• In the affected computer: it converts the computer into a platform for taking malicious action surreptitiously: spam sending, launch of Denial of Service attacks, malware distribution, etc.

It reduces the security level of the computer: it awaits remote-control orders received through IRC.

It uses stealth techniques to avoid being detected by the user:

• It injects itself in running processes.
• It deletes the original file from which it was run once it is installed on the computer.

Gaobot.QJS uses the following propagation or distribution methods:

• Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
• IRC: It sends a copy of itself to all users connected to the channel to which the infected user is connected.
• Computer networks (mapped drives): it creates copies of itself in mapped drives.
• Computer networks (shared resources): it creates copies of itself in shared network resources to which it has access.