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Date discovered:08/09/2010
In the wild:No
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Medium
Static file:Yes
File size:135.168 Bytes
MD5 checksum:A98DC68388D2199E85078AA3D4A58AC9
VDF version:
IVDF version:

 General Method of propagation:
   • Messenger

   •  TrendMicro: TROJ_IRCBRUTE.DH
   •  Sophos: Mal/Behav-103
   •  Avast: Win32:Ruskill-AL [Trj]

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows 7

Side effects:
   • Third party control
   • Drops files
   • Lowers security settings
   • Registry modification

 Files It copies itself to the following location:
   • %APPDATA%\E-73473-3674-74335\msnrsmsn.exe

 Registry One of the following values is added in order to run the process after reboot:

–  [HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Microsoft MainUpdates"="%APPDATA%\E-73473-3674-74335\msnrsmsn.exe"

It creates the following entry in order to bypass the Windows XP firewall:

– [HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\
   • "%APPDATA%\E-73473-3674-74335\msnrsmsn.exe"="%APPDATA%\E-73473-3674-74335\msnrsmsn.exe:*:Enabled:Microsoft

 Messenger It is spreading via Messenger. The characteristics are described below:

– Yahoo Messenger

The sent message looks like one of the following:

   • ahoj, dobry den jste na? ... %link%
     belas fotos nao de voce %link%
     Fotograflarinizi?? %link%
     hey, beautiful facebook photos.. %link%
     hoi niet mooi fotos %link%
     hoj so vase fotografije? %link%
     ich sag nur geile fotos. %link%
     muy hermosas fotos no?? %link%
     u lepo slike ne? ... %link%
     u velmi pekne fotografie od vas? %link%
     uh flotte fotos fra dig %link%
     uh szep kepek rolad %link%
     uh valokuva ei ole? %link%
     uh vos facebook photos? %link%
     uhh, ladne zdjecia z was. %link%
     vackra bilder fran dig %link%
     vakre bilder fra deg. %link%
     woow, imagini frumoase din voi?? %link%
     wow le tue foto bellissime %link%
     wow, fbphotos. %link%

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: **********
Port: 4042
Nickname: %random character string%

– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • disconnect from IRC server
    • Join IRC channel
    • Leave IRC channel

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

Description inserted by Andrei Ilie on Wednesday, September 21, 2011
Description updated by Andrei Ilie on Thursday, September 22, 2011

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