TR/Dldr.Agent.aizj - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Dldr.Agent.aizj
Date discovered:	08/10/2008
Type:	Trojan
Subtype:	Downloader
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Low
Damage Potential:	Low to medium
Static file:	Yes
File size:	181.536 Bytes
MD5 checksum:	693da45a090f56bd6817c7244573b29d
IVDF version:	7.00.07.09 - Wed, 08 Oct 2008 11:32 (GMT+1)

General Method of propagation:
   • No own spreading routine

Aliases:
   • Kaspersky: Trojan-Downloader.Win32.Agent.aizj
   • TrendMicro: TROJ_DROPPER.KGC
   • F-Secure: Trojan-Downloader:W32/Banload.FUF
   • Sophos: Troj/Dloadr-BUR
   • Grisoft: Downloader.Agent.AMNS
   • Bitdefender: Trojan.Agent.Delf.ND

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

Side effects:
   • Downloads a file
   • Downloads a malicious file

Files The following file is created:

– Temporary files that might be deleted afterwards:
   • %temporary internet files%\Content.IE5\%eight-digit random character string%\sub1[1].gif
   • %temporary internet files%\Content.IE5\%eight-digit random character string%\sub[1].gif

It tries to download some files:

– The location is the following:
   • http://71.125.18.24/**********/sub1.gif
It is saved on the local hard drive under: %SYSDIR%\microsoftupdate.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Dldr.Banload.wjk

– The location is the following:
   • http://83.140.184.152/**********/sub.gif
It is saved on the local hard drive under: %SYSDIR%\00.0

File details Programming language:
The malware program was written in Delphi.

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 Andreas Feuerstein on Thu, 09 Oct 2008 11:21 (GMT+1)
Description updated by Andreas Feuerstein on Thu, 09 Oct 2008 11:58 (GMT+1)

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