TR/Spy.Delf.BEW - Trojan

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Summary

Full description

Statistics

Virus:	TR/Spy.Delf.BEW
Date discovered:	13/03/2008
Type:	Trojan
In the wild:	Yes
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Medium
Static file:	Yes
File size:	325.120 Bytes
MD5 checksum:	2c17a4990A97701d2c07e61796aa5b6c
IVDF version:	7.00.03.27 - Fri, 14 Mar 2008 16:28 (GMT+1)

General Method of propagation:
   • No own spreading routine

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

Side effects:
   • Lowers security settings
   • Registry modification
   • Steals information
   • Third party control

Files It copies itself to the following location:
• %WINDIR%\system.exe

Registry The following registry key is added:

– [HKCU\sRegPolicies+\Explorer]
   • NoChangeStartMenu = 1
   • NoClose = 1
   • NoLogOff = 1

The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Old value:
   • Shell = Explorer.exe
   New value:
   • Shell = Explorer.exe %WINDIR%\system.exe

Disable Regedit and Task Manager:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
   New value:
   • DisableTaskMgr = 1

Deactivate Windows XP Firewall:
– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess]
   Old value:
   • Start = %user defined settings%
   New value:
   • Start = 4

Backdoor Contact server:
All of the following:
   • http://inovus.com.pt/**********/help_data.php
   • http://love.ladyzhin.biz/inc/**********/help_data.php
   • http://www.ht-o.de/hto/administrator/**********/help_data.php
   • http://perso146-g5.free.fr/**********/help_data.php
   • http://mambembricantes.com/**********/read_table.php
   • http://salvadorcapitano.com.ar/**********/read_table.php

As a result it may send information and remote control could be provided. This is done via the HTTP GET request on a PHP script.

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 Andrei Gherman on Fri, 14 Mar 2008 11:08 (GMT+1)
Description updated by Andrei Gherman on Fri, 14 Mar 2008 11:27 (GMT+1)

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