Troj/PPdoor-AS

Aliases	Backdoor.Win32.PPdoor.bc
Category	Viruses and Spyware
Type	Trojan
What to do	If you've received an alert for a virus or spyware, then follow the instructions for removing the threat.
Prevalence	low high

Summary


Affected operating systems	Windows
Characteristics	Installs itself in the registry
Included in our products from	June 2006 (4.06)
Protection available since	18 April 2006 12:41:44 (GMT)
Detected by	All Sophos products

Troj/PPdoor-AS is a backdoor Trojan for the Windows platform.

When Troj/PPdoor-AS is installed the following files are created:

<Temp>\tmp1.bat
<System>\donvpihm.dll
<System>\sfcnmdd.exe
<System>\sigtfg32.dll
<System>\wiasdctr.dll
<System>\xobdhyzo.dll

The following registry entries are created to run sfcnmdd.exe on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Update
<System>\sfcnmdd.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Update
<System>\sfcnmdd.exe

The following registry entry is changed to run sfcnmdd.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Userinit
<System>\userinit.exe,<System>\sfcnmdd.exe

(the default value for this registry entry is "<Windows>\System32\userinit.exe,").

The following registry entry is created to run code exported by the worm library on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad
Protocol Connection
(EAC1DCE9-EB48-4782-95A5-27CCAE00B7AB)

The file sigtfg32.dll is registered as a COM object, creating registry entries under:

HKCR\CLSID\(EAC1DCE9-EB48-4782-95A5-27CCAE00B7AB)

The following registry entry is set:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Shell
Explorer.exe,sfcnmdd.exe

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