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Virus:TR/Buzus.EY.3
Date discovered:17/08/2011
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Medium to high
Damage Potential:Medium
Static file:Yes
File size:155.648 Bytes
MD5 checksum:C67B6F1221C241280833CAB483D631CB
VDF version:7.11.13.117 - Wednesday, August 17, 2011
IVDF version:7.11.13.117 - Wednesday, August 17, 2011

 General Methods of propagation:
    Autorun feature
    Messenger


Aliases:
   •  Kaspersky: Backdoor.Win32.Ruskill.do
   •  TrendMicro: BKDR_IRCBRUTE.EK
     Microsoft: Trojan:Win32/Ircbrute
     DrWeb: Trojan.Packed.21754


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


Side effects:
   • Drops files
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %APPDATA%\msnq.exe

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

  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Windows Update Guard"="%APPDATA%\msnq.exe"



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

[HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\
   FirewallPolicy\StandardProfile\AuthorizedApplications\List]
   • "%APPDATA%\msnq.exe"="%APPDATA%\msnq.exe:*:Enabled:Windows Update
      Guard"

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

Windows Live Messenger

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

Server: **********o.nerashti.net
Port: 81
Nickname: %random character string%



 This malware has the ability to collect and send information such as:
    • Current user
    • Information about the Windows operating system


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

 Injection  It injects itself as a remote thread into processes.

    Process name:
   • explorer.exe


Description inserted by Andrei Ilie on Wednesday, October 12, 2011
Description updated by Andrei Ilie on Thursday, October 13, 2011

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