W32/Sdbot-YQ is a worm and IRC backdoor Trojan for the Windows platform.
W32/Sdbot-YQ runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.
When first run W32/Sdbot-YQ copies itself to <System>\xpsp2.exe.
The following registry entries are created to run xpsp2.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft xpsp2
xpsp2.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft xpsp2
xpsp2.exe