Virus:TR/Buzus.hrp
Date discovered:01/06/2008
Type:Trojan
In the wild:No
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:No
IVDF version:7.00.04.121 - Sunday, June 1, 2008

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Symantec: Infostealer.Banker.C
   •  Kaspersky: Trojan.Win32.Buzus.hrp
   •  F-Secure: Trojan.Win32.Buzus.hrp
   •  Sophos: Troj/Clagger-BE
   •  Panda: Trj/Sinowal.VMF
   •  VirusBuster: Trojan.Agent.ESNI
   •  Eset: Win32/TrojanDownloader.Nurech.NCK trojan
   •  Bitdefender: Trojan.Spy.Notos.I


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


Side effects:
   • Registry modification
   • Steals information
   • Third party control

 Files It copies itself to the following location:
   • %SYSDIR%\ntos.exe



The following files are created:

– Temporary files that might be deleted afterwards:
   • %SYSDIR%\wnspoem\audio.dll
   • %SYSDIR%\wnspoem\video.dll

 Registry The following registry key is changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Old value:
   • "Userinit"="%SYSDIR%\userinit.exe,"
   New value:
   • "Userinit"="%SYSDIR%\userinit.exe,%SYSDIR%\ntos.exe,"

 Backdoor Contact server:
The following:
   • http://91.203.92.4/**********xxx.bin

As a result it may send information and remote control could be provided.

 Injection – It injects itself into a process.

    Process name:
   • winlogon.exe


 File details 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 Wednesday, June 11, 2008
Description updated by Thomas Wegele on Wednesday, June 11, 2008

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