W32/Sdbot-ACF is a worm and IRC backdoor Trojan for the Windows platform.
W32/Sdbot-ACF 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-ACF copies itself to <System>\javaup.exe.
The following registry entry is created to run javaup.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Java applet
javaup.exe