Sophos

W32/Sdbot-PJ

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

Summary

 
How it spreads
  • Email attachments
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 17 September 2004 09:45:41 (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-PJ is a worm which attempts to spread to remote network shares protected by weak passwords. W32/Sdbot-PJ is a worm which attempts to spread to remote network shares protected by weak passwords.

W32/Sdbot-PJ contains backdoor Trojan functionality allowing unauthorised remote access to the infected computer via IRC channels while running in the background as a service process.

W32/Sdbot-PJ copies itself to the Windows system folder as msnmngr.exe and creates the following registry entries to ensure it is run at system logon:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Microsofts Help Services = msnmngr.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Microsofts Help Services = msnmngr.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Microsofts Help Services = msnmngr.exe

W32/Sdbot-PJ can also download and execute remote files on the infected computer and flood other computers with network packets.

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