TR/Dldr.Small.ddp.28 - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Dldr.Small.ddp.28
Date discovered:	29/01/2007
Type:	Trojan
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Medium
Static file:	Yes
File size:	20.992 Bytes
MD5 checksum:	3aaaefdb982155056c3ee1707f65f2aa
VDF version:	6.37.00.218 - Mon, 29 Jan 2007 08:20 (GMT+1)
IVDF version:	6.37.00.236 - Mon, 29 Jan 2007 08:20 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Mcafee: AZESearch.dll
   • Kaspersky: Trojan-Downloader.Win32.Small.ddp
   • F-Secure: Trojan-Downloader.Win32.Small.ddp
   • Sophos: Troj/DropRun-D
   • Panda: Adware/TrustIn
   • Eset: Win32/TrojanDownloader.Small.DDP
   • Bitdefender: Trojan.Downloader.Small.BFI

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

Side effects:
   • Downloads files
   • Drops a malicious file
   • Registry modification
   • Third party control

Files The following file is created:

– %WINDIR%\inetloader.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Dldr.Small.ddp.32

It tries to executes the following file:

– Filename:
• regsvr32.exe
using the following command line arguments: /s "%WINDIR%\inetloader.dll"

Registry It registers a browser helper object (BHO) by adding the following keys:

– [HKCR\CLSID\{f015f320-ab08-11db-abbd-0800200c9a66}\InprocServer32]
   • (Default)="%WINDIR%\inetloader.dll"
   • ThreadingModel="Apartment"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   Browser Helper Objects\{f015f320-ab08-11db-abbd-0800200c9a66}]

The following registry keys are added:

– [HKCU\Software\TrustIn\Weekly Executer]
   • LastCfgFetchHigh=%hex number%
   • LastCfgFetchLow=%hex number%

– [HKCU\Software\TrustIn]

– [HKCR\InetLoader.WeeklyExecuter.1]
   • (Default)="WeeklyExecuter Class"

– [HKCR\InetLoader.WeeklyExecuter.1\CLSID]
   • (Default)="{f015f320-ab08-11db-abbd-0800200c9a66}"

– [HKCR\InetLoader.WeeklyExecuter]
   • (Default)="WeeklyExecuter Class"

– [HKCR\InetLoader.WeeklyExecuter\CLSID]
   • (Default)="{f015f320-ab08-11db-abbd-0800200c9a66}"

– [HKCR\InetLoader.WeeklyExecuter\CurVer]
   • (Default)="InetLoader.WeeklyExecuter.1"

– [HKCR\CLSID\{f015f320-ab08-11db-abbd-0800200c9a66}]
   • (Default)="WeeklyExecuter Class"

– [HKCR\CLSID\{f015f320-ab08-11db-abbd-0800200c9a66}\ProgID]
   • (Default)="InetLoader.WeeklyExecuter.1"

– [HKCR\CLSID\{f015f320-ab08-11db-abbd-0800200c9a66}\
   VersionIndependentProgID]
   • (Default)="InetLoader.WeeklyExecuter"

– [HKCR\CLSID\{f015f320-ab08-11db-abbd-0800200c9a66}\
   Programmable]

– [HKCR\CLSID\{f015f320-ab08-11db-abbd-0800200c9a66}\TypeLib]
   • (Default)="{d0460760-ab08-11db-abbd-0800200c9a66}"

Backdoor Contact server:
The following:
   • http://adscontex.com/dir/**********

As a result remote control capability is provided.

Remote control capabilities:
    • Download file
    • Execute file
    • Visit a website

File details Programming language:
The malware program was written in MS Visual C++.

See a brief description here.

Description inserted by Andrei Gherman on Thu, 21 Jun 2007 14:21 (GMT+1)
Description updated by Andrei Gherman on Thu, 21 Jun 2007 14:26 (GMT+1)

» About Malware
» About Phishing
» Viruses In the Wild

« back