TR/Dldr.Exchanger.MO - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Dldr.Exchanger.MO
Type:	Trojan
Subtype:	Downloader
In the wild:	Yes
Reported Infections:	Medium
Distribution Potential:	Low
Damage Potential:	Low to medium
Static file:	Yes
File size:	74.752 Bytes
MD5 checksum:	F49FB418108D70DE51AF3765DCD24FD3
IVDF version:	7.00.06.03 - Wed, 13 Aug 2008 08:52 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Mcafee: BackDoor-DNM trojan
   • F-Secure: Backdoor:W32/Hupigon.ODW
   • Sophos: Troj/Bravo-F
   • Eset: Win32/Agent.ETH trojan
   • Bitdefender: Trojan.Downloader.Exchanger.Gen.2

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

Side effects:
   • Downloads malicious files
   • Registry modification

Files It copies itself to the following location:
• %SYSDIR%\CbEvtSvc.exe

It tries to download a file:

– The location is the following:
• http://66.199.240.138/*****.exe
Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.XPACK.Gen

Registry The following registry keys are added in order to load the service after reboot:

– [HKLM\SYSTEM\CurrentControlSet\Services\CbEvtSvc]
   • "Type"=dword:00000010
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000001
   • "ImagePath"=%paths to malware copies%
   • "DisplayName"="CbEvtSvc"
   • "ObjectName"="LocalSystem"

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

See a brief description here.

Description inserted by Irina Diaconescu on Thu, 14 Aug 2008 14:54 (GMT+1)
Description updated by Andrei Gherman on Wed, 20 Aug 2008 09:17 (GMT+1)

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