W32/Forbot-CH

Please follow the instructions for removing worms.

W32/Forbot-CH 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-CH copies itself to the Windows system folder as svmhost.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\
Microsoft Windows Update = svmhost.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\
Microsoft Windows Update = svmhost.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Microsoft Windows Update = svmhost.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Microsoft Windows Update = svmhost.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce\
Microsoft Windows Update = svmhost.exe

W32/Forbot-CH attempts to spread to network machines using various exploits including the LSASS vulnerability (see MS04-011). The worm may also act as a proxy.

W32/Forbot-CH may download and execute code. The worm may also steal keys for software and delete network shares.