W32/Sdranck-O is a multi-component network worm.
W32/Sdranck-O drops two files to the Windows system folder, thefunk.exe and jarule.exe. thefunk.exe is a member of the Troj/Ranck family of proxy Trojans and jarule.exe is a member of the W32/Sdbot family of network worms, and it is this latter file that spreads W32/Sdranck-O to network shares with weak passwords and via network security exploits.