Sophos

W32/Forbot-DA

Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 16 December 2004 21:40:50 (GMT)
Detected by All Sophos products
  • Endpoint Security and Control 9.0
  • Small business solutions 4.0

Action

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\RunOnce\
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 entries:

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

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

and remove any reference to any file you deleted.

Close the registry editor.

More Information

W32/Forbot-DA is a worm which attempts to spread to remote network shares and computers vulnerable to common exploits. W32/Forbot-DA also contains backdoor functionality, allowing unauthorised remote access to the infected computer via the IRC network, while running in the background as a service process.

W32/Forbot-DA connects to a preconfigured IRC channel and awaits commands from a remote intruder. These include commands to:

steal information
delete network shares
reduce system security
start a proxy server
participate in DDoS attacks
exploit vulnerabilities
steal registration keys for computer games
harvest email addresses from the Windows address book and Instant Messenger configuration files W32/Forbot-DA is a worm which attempts to spread to remote network shares and computers vulnerable to common exploits.

W32/Forbot-DA copies itself to the Windows system folder and creates the following registry entries to run itself automatically on log-on:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
HP Deskjet 500
HP_DeskJet_500.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\
HP Deskjet 500
HP_DeskJet_500.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
HP Deskjet 500
HP_DeskJet_500.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
HP Deskjet 500
HP_DeskJet_500.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce\
HP Deskjet 500
HP_DeskJet_500.exe

On NT based versions of Windows HP_DeskJet_500.exe is run as a new service named Level.Kicks-Ass.Org with a display name of "HP Deskjet 500"

New registry entries are created under

HKLM\SYSTEM\CurrentControlSet\Services\Level.Kicks-Ass.Org\

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