Virus:TR/Dldr.Adload.MA.3
Date discovered:07/11/2007
Type:Trojan
Subtype:Downloader
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low
Static file:Yes
File size:98.677 Bytes
MD5 checksum:55d53c07dc9edfc80f021a4ac3d667c0
IVDF version:7.00.00.181 - Wednesday, November 7, 2007

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Symantec: Downloader.MisleadApp
   •  Kaspersky: Trojan-Downloader.Win32.Adload.ma
   •  F-Secure: Trojan-Downloader.Win32.Adload.ma
   •  Grisoft: Downloader.Purityscan.AV
   •  VirusBuster: Adware.UltimateDefend.C
   •  Eset: Win32/Adware.UltimateDefender application


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


Side effects:
   • Downloads a file


Right after execution the following information is displayed:


 Files The following files are created:

– Non malicious files:
   • %PROGRAM FILES%\SystemDefender\SystemDefender.db
   • %PROGRAM FILES%\SystemDefender\Uninstall.exe
   • %PROGRAM FILES%\SystemDefender\program.info

– %PROGRAM FILES%\SystemDefender\SystemDefender.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: SPR/Fake.SystemDef




It tries to download a file:

– The location is the following:
   • http://system-defender.com/**********defender.pkg
It is saved on the local hard drive under: %PROGRAM FILES%\SystemDefender\SystemDefender.pkg

 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 Thomas Wegele on Thursday, May 15, 2008
Description updated by Thomas Wegele on Thursday, May 15, 2008

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