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Virus:BDS/Oserdi.DY
Date discovered:28/06/2010
Type:Backdoor Server
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low
Static file:Yes
File size:71680 Bytes
MD5 checksum:617238ecde2eb9209bdd34dab4c01dc1
VDF version:7.10.03.191
IVDF version:7.10.08.209 - Monday, June 28, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Backdoor.Win32.Oserdi.dy
   •  TrendMicro: Mal_Palevo5
   •  F-Secure: Backdoor.Win32.Oserdi.dy
   •  Sophos: Mal/TibsPk-A
   •  Eset: Win32/Kryptik.FCX
   •  DrWeb: Trojan.Packed.20312


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


Side effects:
   • Registry modification

 Files It copies itself to the following location:
   • C:\Documents and Settings\Administrator\Application Data\mrpky.exe

 Registry The following registry key is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Taskman"="C:\Documents and Settings\Administrator\Application Data\mrpky.exe"

 Backdoor Contact server:
All of the following:
   • prcolina.prichaonica.com
   • kreten.banjalucke-ljepotice.ru
   • sombrero.balkan-hosting.net
   • dzaba.cultarts.com


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

    Process name:
   • explorer.exe


 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • UPX

Description inserted by Ana Maria Niculescu on Friday, October 1, 2010
Description updated by Ana Maria Niculescu on Friday, October 8, 2010

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