W32/SdBot-JM

Category: Viruses and Spyware
Type: Win32 worm
Prevalence: No Reports

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W32/SdBot-JM 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/SdBot-JM spreads to network shares with weak passwords as a result of the backdoor Trojan element receiving the appropriate command from a remote user. W32/SdBot-JM deletes the host computer's own C$, D$, IPC$ and ADMIN$ network shares.

W32/SdBot-JM copies itself to the Windows system folder as msclac.exe and creates entries in the registry at the following locations to run itself on system startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\msclac
= "msclac.exe"

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\msclac
= "msclac.exe"

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices\msclac
= "msclac.exe"

HKU\Software\Microsoft\Windows\CurrentVersion\Run\msclac
= "msclac.exe"

HKU\Software\Microsoft\Windows\CurrentVersion\RunOnce\msclac
= "msclac.exe"

W32/SdBot-JM also sets the following registry entry to disable DCOM networking:

HKLM\Software\Microsoft\OLE\EnableDCOM = "N"