BDS/Hupigon.ccy.28 - Backdoor Server

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Summary

Full description

Statistics

Virus:	BDS/Hupigon.ccy.28
Date discovered:	27/10/2006
Type:	Backdoor Server
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Medium
Static file:	Yes
File size:	400.196 Bytes
MD5 checksum:	23f7553942c25922bfe068c20d2f1ffd
VDF version:	6.36.00.175 - Fri, 27 Oct 2006 08:00 (GMT+1)
IVDF version:	6.36.00.194

General Method of propagation:
   • No own spreading routine

Aliases:
   • Mcafee: BackDoor-AWQ.b
   • Kaspersky: Backdoor.Win32.Hupigon.ccy
   • F-Secure: Backdoor.Win32.Hupigon.ccy
   • Eset: Win32/Hupigon

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

Side effects:
   • Downloads a file
   • Drops malicious files
   • Records keystrokes
   • Registry modification
   • Steals information
   • Third party control

Files It copies itself to the following location:
• %WINDIR%\svchost.com

It deletes the initially executed copy of itself.

The following files are created:

– %WINDIR%\svchost.DLL Further investigation pointed out that this file is malware, too. Detected as: BDS/Hupigon.E.1

– %WINDIR%\svchost_Hook.DLL Further investigation pointed out that this file is malware, too. Detected as: BDS/Hupigon.BB.1

– %WINDIR%\svchostKey.DLL Further investigation pointed out that this file is malware, too. Detected as: BDS/Hupigon.BB

– %WINDIR%\uninstal.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.

It tries to download a file:

– The location is the following:
• i.6to23.com/lovelyairong/**********
This file may contain further download locations and might serve as source for new threats.

Registry The following registry keys are added in order to load the services after reboot:

– [HKLM\SYSTEM\CurrentControlSet\Services\GrayPigeonServer]
   • "Type"=dword:00000110
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000000
   • "ImagePath"="%WINDIR%\svchost.com"
   • "DisplayName"="Gray_Pigeon_Server"
   • "ObjectName"="LocalSystem"
   • "Description"="»Ò¸ë×Ó·þÎñ¶Ë³ÌÐò¡£Ô¶³Ì¼à¿Ø¹ÜÀí."

– [HKLM\SYSTEM\CurrentControlSet\Services\GrayPigeonServer\Security]
   • "Security"=%hex values%

– [HKLM\SYSTEM\CurrentControlSet\Services\GrayPigeonServer\Enum]
   • "0"="Root\\LEGACY_GRAYPIGEONSERVER\\0000"
   • "Count"=dword:00000001
   • "NextInstance"=dword:00000001

The following registry keys are changed:

– [HKCU\Software\Microsoft\Internet Explorer\Main]
   Old value:
   • "Check_Associations"=%user defined settings%
   New value:
   • "Check_Associations"="yes"

– [HKCU\Software\Microsoft\Internet Connection Wizard]
   New value:
   • "Completed"=hex:01,00,00,00

Backdoor Contact server:
The following:
• %URL from downloaded file%

As a result remote control capability is provided.

Remote control capabilities:
• Start keylog

Injection – It injects the following file into a process: svchost.DLL

    Process name:
   • iexplore.exe

– It injects the following file into a process: svchostKey.DLL

    Process name:
   • %all running processes%

– It injects the following file into a process: svchost_Hook.DLL

    Process name:
   • %all running processes%

Rootkit Technology It is a malware-specific technology. The malware hides its presence from system utilities, security applications and in the end, from the user.

Hides the following:
– Its own files

Method used:
• Hidden from Windows API

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:
• ASPack

See a brief description here.

Description inserted by Adriana Popa on Wed, 29 Nov 2006 11:24 (GMT+1)
Description updated by Adriana Popa on Wed, 29 Nov 2006 12:07 (GMT+1)

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