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Virus:TR/Fake.Rean.1624
Date discovered:12/05/2011
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:47.509 Bytes
MD5 checksum:307C71D9E6B99F3DD6ACBC21D973B281
VDF version:7.11.07.246 - Thursday, May 12, 2011
IVDF version:7.11.07.246 - Thursday, May 12, 2011

 General Aliases:
   •  TrendMicro: TROJ_IRCBRUTE.EF
   •  Sophos: Mal/FakeAV-FS
   •  Microsoft: Rogue:Win32/FakeRean


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:
   • %recycle bin%\S-1-5-21-0243936033-3052116371-381863308-1811\vsbntlo.exe



The following file is created:

%recycle bin%\S-1-5-21-0243936033-3052116371-381863308-1811\Desktop.ini

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

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "12CFG214-K641-12SF-N85P"="%recycle bin%\S-1-5-21-0243936033-3052116371-381863308-1811\vsbntlo.exe"

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

Server: **********s3.hmarhelo.com
Port: 1199
Nickname: %random character string%



– This malware has the ability to collect and send information such as:
    • Username
    • 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

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

    Process name:
   • %WINDIR%\explorer.exe


 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.

Description inserted by Andrei Ilie on Tuesday, October 18, 2011
Description updated by Andrei Ilie on Wednesday, October 19, 2011

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