Virus:TR/Click.Agent.ela
Date discovered:12/11/2008
Type:Trojan
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:178.176 Bytes
MD5 checksum:1f62f8fa15b0325b405cd273add70ecc
IVDF version:7.01.00.71 - Wednesday, November 12, 2008

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Symantec: Downloader
   •  Mcafee: AdClicker-GI trojan
   •  Kaspersky: Trojan-Clicker.Win32.Agent.ela
   •  F-Secure: Trojan-Clicker.Win32.Agent.ela
   •  Sophos: Troj/Agent-IFM
   •  Grisoft: Clicker.UNM


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


Side effects:
   • Registry modification

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKCR\CLSID\{5D68B6D7-32E6-11CF-9281-463BF66AA24F}\InProcServer32]
   • "ThreadingModel"="Apartment"
   • @=""%malware execution directory%\%malware dll%"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "xcsgwpcukpwz"="%SYSDIR%\regsvr32.exe /s \"%malware execution directory%\%malware dll%\""



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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   Browser Helper Objects\{5D68B6D7-32E6-11CF-9281-463BF66AA24F}]
   • "NoExplorer"=dword:00000001



The following registry key is added:

– [HKCR\CLSID\{5D68B6D7-32E6-11CF-9281-463BF66AA24F}]
   • @="cpmsky browser enhancer"

 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 Wednesday, December 17, 2008
Description updated by Thomas Wegele on Wednesday, December 17, 2008

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