F
Franc Zabkar
I've been using Paolo Monti's "GDI32 / WMF Patch" for nearly a year
now but it was only recently that AVG told me that the gdihook.dll
component file was infected with the BackDoor.Hupigon4.ADUA trojan. A
scan at Virustotal resulted in 18 out 36 antivirus software detecting
the same malware. Symantec and TrendMicro were two that didn't detect
it.
I'm wondering whether this is a false positive.
Here are the results:
http://www.users.on.net/~fzabkar/gdihook_dll_scan.htm
The package is delivered as a single install.exe file. When this file
is scanned by Virustotal, Sophos identifies "Sus/Madcode-A" malware.
All other antivirus products detect nothing.
I notice the following text strings in gdihook.dll:
====================================================================
forbiddenAPIsMutex madCodeHook warning...
You've tried to hook one of the following APIs:
These APIs are usually hooked in order to hide a process. Of course
madCodeHook can do that just fine. But I don't want virus/trojan
writers to misuse madCodeHook for illegal purposes. So I've decided to
not allow these APIs to be hooked. If you absolutely have to hook
these APIs, and if you have a commercial madCodeHook license, you may
contact me.
====================================================================
BTW, the subject patch is available here:
http://web.archive.org/web/20070203164123/http://d1.nod32.ch/download/wmfpatch11.zip
My research leads me to believe that MadCodeHook is a legitimate
product that has occasionally been misused by malware writers. It is
for this reason that I suspect the WMF patch is being falsely
identified as infected.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
now but it was only recently that AVG told me that the gdihook.dll
component file was infected with the BackDoor.Hupigon4.ADUA trojan. A
scan at Virustotal resulted in 18 out 36 antivirus software detecting
the same malware. Symantec and TrendMicro were two that didn't detect
it.
I'm wondering whether this is a false positive.
Here are the results:
http://www.users.on.net/~fzabkar/gdihook_dll_scan.htm
The package is delivered as a single install.exe file. When this file
is scanned by Virustotal, Sophos identifies "Sus/Madcode-A" malware.
All other antivirus products detect nothing.
I notice the following text strings in gdihook.dll:
====================================================================
forbiddenAPIsMutex madCodeHook warning...
You've tried to hook one of the following APIs:
These APIs are usually hooked in order to hide a process. Of course
madCodeHook can do that just fine. But I don't want virus/trojan
writers to misuse madCodeHook for illegal purposes. So I've decided to
not allow these APIs to be hooked. If you absolutely have to hook
these APIs, and if you have a commercial madCodeHook license, you may
contact me.
====================================================================
BTW, the subject patch is available here:
http://web.archive.org/web/20070203164123/http://d1.nod32.ch/download/wmfpatch11.zip
My research leads me to believe that MadCodeHook is a legitimate
product that has occasionally been misused by malware writers. It is
for this reason that I suspect the WMF patch is being falsely
identified as infected.
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.