Sophos

W32/Sdbot-PV

Aliases
  • Backdoor.SdBot.gen
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Protection available since 4 October 2004 13:20:39 (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

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

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-PV is an IRC backdoor that can spread via IPC shares protected by weak passwords.

An infected computer can be controlled by a remote attacker through IRC channels. W32/Sdbot-PV is an IRC backdoor that can spread via IPC shares protected by weak passwords.

In order to run automatically when Windows starts up the worm copies itself to the file wuamngr1.exe in the Windows system folder and adds the following registry entries:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Win32 Services1 = wuamngr1.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Win32 Services1 = wuamngr1.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Win32 Services1 = wuamngr1.exe

W32/Sdbot-PV connects to an IRC server specified by the author and joins a channel from which it will receive further commands. These commands can start any of the following actions:

sock4 proxy server
UDP, SYN or PING flooding
TCP redirection
download files
execute arbitrary commands
install an updated version of the backdoor
spread via weakly-protected IPC shares
steal product keys
send raw IRC commands

RSS|Atom
Get reports about the latest virus and spyware threats delivered to your computer