W32/Sdbot-YF

Please follow the instructions for removing worms.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entries. The removal of these entries is optional in Windows 95/98/Me. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\

and remove any reference to any file you deleted.

Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:

HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\Run\

and remove any reference to any file you deleted.

Close the registry editor.

W32/Sdbot-YF is a network worm and backdoor Trojan which runs in the background as a service process and allows unauthorised remote access to the computer via IRC channels.

When executed W32/Sdbot-YF copies itself to the Windows system folder with the filename happy.exe and sets the following registry entries so that it is automatically executed every time the computer restarts:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
winter
happy.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
winter
happy.exe

W32/Sdbot-YF tries to steal CD keys for several computer games, including:

UEFA EURO 2004
Need For Speed Underground
Command & Conquer Generals
Battlefield Vietnam
Battlefield 1942 Road To Rome
Battlefield 1942
Call Of Duty
Soldier of Fortune II
Neverwinter Nights
Project IGI 2
Counter-Strike
Unreal Tournament 2003
Half-Life