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Date discovered:15/10/2009
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:95.744 Bytes
MD5 checksum:57a1694cfed18f7af94a1b972f9283fb
IVDF version:

 General Aliases:
   •  Mcafee: W32/Koobface.worm.gen.o
   •  Panda: W32/Koobface.GN.worm
   •  Eset: Win32/Koobface.NCK
   •  Bitdefender: Worm.Generic.97072

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\mstre22.exe

It deletes the initially executed copy of itself.

It deletes the following files:
   • %WINDIR%\dxxdv34567.bat
   • C:\3.reg

The following files are created:

%WINDIR%\dxxdv34567.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.

It tries to download some files:

– The locations are the following:
At the time of writing this file was not online for further investigation.

 Registry The values of the following registry key are removed:

–  [HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   Microsoft\Windows\CurrentVersion\Internet Settings]
   • AutoConfigURL
   • ProxyOverride
   • ProxyServer

The following registry key is added:

– [HKLM\SOFTWARE\Classes\MIME\Database\Content Type\
   • "CLSID" = "{25336920-03F9-11cf-8FD0-00AA00686F13}"
   • "Extension" = ".xml"
   • "Encoding" = hex: 08,00,00,00

The following registry keys are changed:

– [HKEY_USERS\S-1-5-21-2025429265-1425521274-839522115-1003\Software\
   Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "MigrateProxy"=dword:0x00000001
   • "ProxyEnable"=dword:0x00000000

– [HKLM\SYSTEM\ControlSet001\Hardware Profiles\0001\Software\
   Microsoft\windows\CurrentVersion\Internet Settings]
   New value:
   • "ProxyEnable"=dword:0x00000000

 Injection – It injects itself as a thread into a process.

    Process name:
   • regedit.exe

 Miscellaneous  Checks for an internet connection by contacting the following web site:

Furthermore it contains the following strings:
   • document.getElementById("hsmDoneBtn").fireEvent("onmousedown", evt);

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

Descrição enviada por Petre Galan em terça-feira, 23 de fevereiro de 2010
Descrição atualizada por Petre Galan em terça-feira, 23 de fevereiro de 2010

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