Date discovered:21/06/2011
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:135.776 Bytes
MD5 checksum:ED5E502DA77CE0A5F23DCD413DD78121
VDF version:
IVDF version:

 General Aliases:
   •  TrendMicro: TROJ_RANBYUS.AK
   •  Sophos: Troj/Ranbyus-A
   •  Microsoft: TrojanSpy:Win32/Ranbyus.G

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

Side effects:
   • Drops files
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\windebug32.exe

It deletes the initially executed copy of itself.

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

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\
   • "Windows Debugger 32"="%SYSDIR%\windebug32.exe"

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

– [HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\
   • "%SYSDIR%\svchost.exe"="%SYSDIR%\svchost.exe:*:Enabled:Windows
      Debugger 32"

The following registry key is added:

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "SysDebug32"="DC 93 5A 27 BB 78 EF 79 A9 "

 Backdoor Contact server:
The following:
   • http://**********nesturizm114.ru/tur1340/index.php?id=aa**********

As a result it may send some information.

 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.

説明の挿入者 Andrei Ilie の 2011年10月21日金曜日
説明の更新者 Andrei Ivanes の 2011年10月28日金曜日

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