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Virus:TR/Delf.kp
Date discovered:28/03/2006
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:200.192 Bytes
MD5 checksum:1055704da966c3df3c4f7a12d3ab0E5f
VDF version:6.34.00.108

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Trojan.Win32.Delf.kp
   •  TrendMicro: TROJ_DELF.AXE


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


Side effects:
   • Registry modification

 Files It copies itself to the following locations:
   • %WINDIR%\csrss.exe
   • %WINDIR%\smss.exe
   • %SYSDIR%\chkntsv.exe




It tries to download a file:

– The location is the following:
   • http://ex14.2ch.net/news4vip/**********

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx]
   • "Title"="ClientServerRuntimeProcess"
   • "Flags"=hex:08

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx\0001]
   • "ClientServerRuntimeProcess"="%WINDIR%\csrss.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx\0002]
   • "CheckNetworkService"="%SYSDIR%\chkntsv.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 the following runtime packer:
   • UPX

Description inserted by Iulia Diaconescu on Thursday, March 30, 2006

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