W32/Sdbot-AFM

Please follow the instructions for removing worms.

W32/Sdbot-AFM is a worm and IRC backdoor for the Windows platform.

W32/Sdbot-AFM may spread over network shares, instant messaging programmes, and via weak SQL passwords.

W32/Sdbot-AFM 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.

W32/Sdbot-AFM includes functionality to access the internet and communicate with a remote server via HTTP.

When first run W32/Sdbot-AFM copies itself to <Windows folder>\csr.exe.

The file csr.exe is registered as a new system driver service named "csrss32", with a display name of "Client Server Runtime Service" and a startup type of automatic, so that it is started automatically during system startup.

Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\csrss32\

W32/Sdbot-AFM sets the following registry entries, disabling the automatic startup of other software:

HKLM\SYSTEM\CurrentControlSet\Services\Messenger
Start
4

HKLM\SYSTEM\CurrentControlSet\Services\RemoteRegistry
Start
4

HKLM\SYSTEM\CurrentControlSet\Services\TlntSvr
Start
4

Registry entries are set as follows:

HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
DoNotAllowXPSP2
1

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

Registry entries are created under:

HKLM\SOFTWARE\Microsoft\Security Center\
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile\
HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile\