Virus:TR/Dldr.Renos.CH
Date discovered:07/01/2009
Type:Trojan
Subtype:Downloader
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low
Static file:Yes
File size:52.224 Bytes
MD5 checksum:93350d0186dc990b5fdf69757746e816
IVDF version:7.01.01.79 - Wednesday, January 7, 2009

 General Method of propagation:
   • No own spreading routine


Alias:
   •  Sophos: Troj/Renos-CH


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Downloads malicious files

 Files It tries to download some files:

– The location is the following:
   • http://dasgdasg.com/**********?id=**********&adv=0&uid=**********
This file may contain further download locations and might serve as source for new threats.

– The location is the following:
   • http://future-pictures.com/cfg/**********/video0.cfg
It is saved on the local hard drive under: %TEMPDIR%\yyy%five-digit random character string%.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Agent.avds




It tries to executes the following file:

– Filename:
   • %SYSDIR%\cmd.exe
using the following command line arguments: /c del %executed file%
This batch file is used to delete a file.

 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 Lutz Koch on Wednesday, January 7, 2009
Description updated by Philipp Wolf on Wednesday, January 7, 2009

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