Virus:TR/Drop.Agent.tdr
Date discovered:23/09/2008
Type:Trojan
Subtype:Dropper
In the wild:No
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low
Static file:Yes
File size:151.580 Bytes
MD5 checksum:5b4a528aff5726712c3c4714492fc71a
IVDF version:7.00.06.202 - Tuesday, September 23, 2008

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: not-a-virus:AdWare.Win32.Agent.fps
   •  F-Secure: AdWare.Win32.Agent.fps


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


Side effects:
   • Drops a malicious file
   • Registry modification

 Files The following files are created:

– Non malicious file:
   • %PROGRAM FILES%\LuckyTender\1.3.0\uninst.exe

– %PROGRAM FILES%\LuckyTender\1.3.0\LuckyTender.dll Further investigation pointed out that this file is malware, too. Detected as: TR/BHO.TF

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

– [HKCR\CLSID\{3794345D-C731-4FBB-8471-73DDC8DFFDD2}\InProcServer32]
   • (Default)="%PROGRAM FILES%\LuckyTender\1.3.0\LuckyTender.dll"
   • ThreadingModel="Both"



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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   Browser Helper Objects\{5E2402A0-5F99-4188-B30D-D8743996B340}]
   • (Default)="LuckyTender"

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


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

Description inserted by Thomas Wegele on Friday, November 7, 2008
Description updated by Thomas Wegele on Friday, November 7, 2008

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