Summary

Summary
Action
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| How it spreads |
|
|---|---|
| Affected operating systems | Windows |
| Characteristics |
|
| Protection available since | 30 August 2005 05:36:50 (GMT) |
| Last updated | 31 August 2005 01:36:45 (GMT) |
| Detected by | All Sophos products |
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Action

Summary
Action
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Please follow the instructions for removing worms.
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W32/Codbot-W is a network worm and backdoor Trojan which allows a remote intruder to gain access and control over the computer.
W32/Codbot-W can spread to weakly protected Microsoft SQL servers, and computers vulnerable to the RPC-DCOM (MS04-012), LSASS (MS04-011), PnP (MS05-039) and IMAIL exploits.
When first run W32/Codbot-W copies itself to <System>\Perfhmon.exe.
The worm may create the following file:
<Temp>\terminate.bat - this may be deleted.
The file Perfhmon.exe is registered as a new system driver service named "Perfhmon", with a display name of "Performance Logs" and a startup type of automatic, so that it is started automatically during system startup.
Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\Perfhmon\
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\Perfhmon\
HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\Perfhmon\
The following patches for the operating system vulnerabilities exploited by W32/Codbot-W can be obtained from the Microsoft website:
