W32/Sdbot-ABG is a worm and IRC backdoor Trojan for the Windows platform.
W32/Sdbot-ABG 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-ABG copies itself to <System>\spoolsub.exe.
The following registry entries are created to run spoolsub.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Spooler Subsystem
spoolsub.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Spooler Subsystem
spoolsub.exe