Virus:TR/Vundo.MD
Date discovered:13/11/2008
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:No
File size:~ 26.000 Bytes
IVDF version:7.01.00.83 - Thursday, November 13, 2008

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Trojan.Win32.Agent.anyk
   •  TrendMicro: TROJ_VUNDO.SC
   •  F-Secure: Trojan:W32/Vundo.BL
   •  Bitdefender: Trojan.Vundo.FYD


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\%eight-digit random character string%.dll



It deletes the initially executed copy of itself.

 Registry The following registry key is added in order to run the process after reboot:

– [HKCR\CLSID\{73259091-9574-4ED8-A40F-7F65AFC28634}\InprocServer32]
   • @="%SYSDIR%\%eight-digit random character string%.dll"
   • "ThreadingModel"="Both"



The following registry key is added:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\
   %eight-digit random character string%]
   • "Asynchronous"=dword:00000001
   • "DllName"="%eight-digit random character string%.dll"
   • "Impersonate"=dword:00000000
   • "Logon"="o"
   • "Logoff"="f"

 File details Programming language:
 The malware program was written in MS Visual C++.


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Thomas Wegele on Monday, November 24, 2008
Description updated by Thomas Wegele on Monday, November 24, 2008

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