high
Summary
Summary
Action- More Information
| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 15 October 2004 07:56:33 (GMT) |
| Last updated | 28 June 2005 10:54:20 (GMT) |
| Detected by | All Sophos products |
Sophos beta program
- Endpoint Security and Control 9.0
- Small business solutions 4.0
Action
- Summary
- Action
- More Information
Please follow the instructions for removing worms.
Download and install the Microsoft patch mentioned above.
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-BG is a worm which attempts to spread to remote network shares. It also 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/Forbot-BG copies itself to the Windows system folder as Removeme.EXE and creates entries in the registry at the following locations so as to run itself on system startup:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\Zonealarm
HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\Zonealarm
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\Zonealarm
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\Zonealarm
HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce\Zonealarm
W32/Forbot-BG also creates its own service named "iexplorer", with the display name "zonealarm".
W32/Forbot-BG attempts to spread to network machines using various exploits including the LSASS vulnerability (see MS04-011).
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