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Virus:Worm/Rebhip.A.3893
Date discovered:20/07/2011
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:710.674 Bytes
MD5 checksum:7EB6FDB4C1E4CA0C5585B645056F5CC0
VDF version:7.11.12.21 - Wednesday, July 20, 2011
IVDF version:7.11.12.21 - Wednesday, July 20, 2011

 General Aliases:
   •  TrendMicro: TROJ_KRYPTIK.VI
   •  Sophos: Troj/Agent-RYW
     Microsoft: Worm:Win32/Rebhip.A


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


Side effects:
   • Third party control
   • Drops malicious files
   • Records keystrokes
   • Registry modification

 Files It copies itself to the following location:
   • C:\Ie8\Install.exe



The following files are created:

%TEMPDIR%\%current username%%number%.txt
%APPDATA%\%current username%log.dat

 Registry The following registry keys are added in order to run the processes after reboot:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\
   Run]
   • "Nvidia"="C:\Ie8\Install.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\
   Run]
   • "Nvidia"="C:\Ie8\Install.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "Rundll32"="C:\Ie8\Install.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "Svchost"="C:\Ie8\Install.exe"



The following registry key is added:

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\
   {87E70I12-5202-G3S8-260H-4N47RPE10O18}]
   • "StubPath"="C:\Ie8\Install.exe Restart"

 Backdoor Contact server:
All of the following:
   • **********terarturo.no-ip.biz:81
   • **********144.11.190.powervt.com.ar:81



Sends information about:
     Information about the Windows operating system


Remote control capabilities:
     Start keylog

 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 Andrei Ilie on Tuesday, September 13, 2011
Description updated by Andrei Ilie on Tuesday, September 13, 2011

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