high
Summary
Summary
Action- More Information
| Affected operating systems | Windows |
|---|---|
| Included in our products from | November 2005 (3.99) |
| Protection available since | 19 March 2004 12:20:51 (GMT) |
| Last updated | 3 October 2005 09:53:21 (GMT) |
| Detected by | All Sophos products |
Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
Check your administrator passwords and review network security.
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\
Win Patch = ntldr.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\
Win Patch = ntldr.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Win Patch = ntldr.exe
and delete them if they exist.
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\Win Patch = ntldr.exe
and delete it if it exists.
Close the registry editor and reboot your computer.
More Information
W32/Sdbot-GS is a backdoor Trojan and network-aware worm which runs in the background as a service process and allows unauthorized remote access to the computer via IRC channels.
W32/Sdbot-GS remains resident, listening for commands from remote users. If the appropriate commands are received the worm will begin scanning the internet for network shares with weak administrator passwords and will attempt to copy itself to these shares. W32/Sdbot-GS is a backdoor Trojan and network-aware worm which runs in the background as a service process and allows unauthorized remote access to the computer via IRC channels.
W32/Sdbot-GS copies itself to the Windows System folder as NTLDR.EXE and creates the following registry entries so that the Trojan is run when the computer restarts:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Win Patch = ntldr.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Win Patch = ntldr.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\
Win Patch = ntldr.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Win Patch = ntldr.exe
W32/Sdbot-GS remains resident, listening for commands from remote users. If the appropriate commands are received the worm will begin scanning the internet for network shares with weak administrator passwords and will attempt to copy itself to these shares.
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