Drcrypt GUID

Posted on 2010-01-11
Medium Priority
Last Modified: 2013-12-06

My GMER is detecting a GUID "DF6DA606-904D-4C18-823F-A4CFC3035E53" as root kit but I want to dcrypt it so as to undertsnad the behaviour of it, can some one help. Also there is a file by the name Ext.exe, using a SVCHOST port.... on my system, it kills the anti virus and it's services, no was to run a scan on this......
This is very urgent.
Question by:joshiap
  • 2
LVL 20

Accepted Solution

Mal Osborne earned 750 total points
ID: 26290136
Regedit & search for part of the GUID string. Being a root kit, it probably has modified the operating system to prevent you from altering, or even seeing relevant files.  Best option would be to remove the HDD, then temporarily install it into another PC for scanning & analysis.

Author Comment

ID: 26295184
Well am planning to analyse not remove it.
Some more  Infor I can gather :

File Name: Ext.exe
ext.exe" is identified as a threat in 87% cases.This  file "ext.exe" is known to be created under the following filenames:
The file is mostly located at the below mentioned path in our environment, where-in %username%  is a variable referring to the file system directory containing user profile.
 C:\Documents and Settings\%username%\Application Data\Microsoft\Installer\ {DF6DA606-904D-4C18-823F-A4CFC3035E53}\ 
The GUID mentioned is the same in all the cases. This GUID is found to be associated with efax messenger 
Unable to submit the file sample on threat expert
The file is not accepted. Its format is not supported. 
When submitted the samples to the Sandbox, it failed with the following error message:
Error #1: The sample is no valid Win32 application.
In the file properties:
Windows PIF Settings:
Custom MS-DOS initilazation files.
Autoexec file name
Config Filename
File size 4.59 KB (4,710 bytes)
Size on disk : 8.00 KB (8,192 bytes)
Can some one asvide as to what this can be... ? And am not looking for directions but answers

Assisted Solution

ViR earned 750 total points
ID: 26340652
Download Process Explorer. http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
You can see all the files that ext.exe is using

Do a search for the GUID in registry to know where it is, how it is launched.. like run or Active Component, etc..

Author Closing Comment

ID: 31675898
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