Virus:TR/Hijack.Explor.687
Date discovered:03/11/2006
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:115.712 Bytes
MD5 checksum:917bf66378af965035c5a17b098978a7
VDF version:6.36.00.146
IVDF version:6.36.00.163 - Wednesday, October 25, 2006

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Trojan-Spy.Win32.Delf.tl
   •  Eset: Win32/PSW.Delf.NDL
   •  Bitdefender: Win32.ExplorerHijack


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


Side effects:
   • Drops files
   • Drops a malicious file
   • Registry modification

 Files It copies itself to the following locations:
   • C:\gameload.dll
   • %WINDIR%\love.exe



The following files are created:

– A file that is for temporary use and it might be deleted afterwards:
   • C:\ali.html

– %WINDIR%\winctrlc.dll Further investigation pointed out that this file is malware, too. Detected as: 2686

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "startup"="%WINDIR%\love.exe"



The following registry key is added:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion]
   • "dumbnod"="SOFTWARE\Microsoft\Windows\CurrentVersion\Run"
   • "myloc"="startup"

 Injection –  It injects the following file into a process: %WINDIR%\winctrlc.dll

    Process name:
   • iexplore.exe


 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.

Description inserted by Monica Ghitun on Friday, November 3, 2006
Description updated by Monica Ghitun on Monday, November 20, 2006

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