high
Summary
Summary
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| How it spreads |
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|---|---|
| Affected operating systems | Windows |
| Characteristics |
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| Protection available since | 10 August 2005 12:57:54 (GMT) |
| Detected by | All Sophos products |
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Action
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More Information
W32/Forbot-FH is a worm and IRC backdoor Trojan for the Windows platform.
W32/Forbot-FH spreads to other network computers infected with Troj/Optix and to other network computers by exploiting common buffer overflow vulnerabilites, including LSASS (MS04-011).
W32/Forbot-FH runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.
When first run W32/Forbot-FH copies itself to <System>\scvvhost.exe.
The following registry entries are created to run scvvhost.exe on startup:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Windows Update
scvvhost.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Windows Update
scvvhost.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce
Microsoft Windows Update
scvvhost.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
Microsoft Windows Update
scvvhost.exe
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Windows Update
scvvhost.exe
The file scvvhost.exe is registered as a new file system driver service named "Microsoft Update", with a display name of "Microsoft Windows Update". Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\Microsoft Update\
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