Summary

Summary
Action
More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 5 November 2004 13:45:45 (GMT) |
| Detected by | All Sophos products |
- Free virus, spyware, and adware scan
- Test your existing anti-virus protection
- Find threats your anti-virus missed
Action

Summary
Action
More Information
Please follow the instructions for removing worms.
Change any data that may have become compromised.
You will also need to edit the following registry entries, if they are present. 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 entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
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.
More Information
W32/Sdbot-QX is a network worm and a backdoor Trojan which runs in the background as a service process and allows unauthorised remote access to the computer via IRC channels.
As a backdoor, W32/Sdbot-QX can be used to install and execute programs on your computer, retrieve system information and flood other computers with network packets.
Sophos Anti-Virus version 3.85 detects this worm as W32/Sdbot-Fam without requiring an update. W32/Sdbot-QX is a network worm and a 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-QX copies itself to the Windows system folder with the filename BBSBW.EXE and sets the following registry entries to ensure the worm is run at Windows login:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
gdagdgajs = bbsbw.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
gdagdgajs = bbsbw.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
gdagdgajs = bbsbw.exe
W32/Sdbot-QX attempts to copy itself to remote network shares with weak passwords.
As a backdoor, W32/Sdbot-QX can be used to install and execute programs on your computer, retrieve system information and flood other computers with network packets.
Sophos anti-virus products since version 3.85 have been capable of detecting this worm as W32/Sdbot-Fam without requiring an update.
