TROJ_SASFIS.XG

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It deletes itself after execution.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following copies of itself into the affected system:

• %User Temp%\~__UNINST.EXE

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Other System Modifications

This Trojan deletes the following files:

• %User Temp%\~pmThis.tmp
• 59.txt

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinHgwd32
SYSTEM\CurrentControlSet\Services\WinHgwd32 = "Windows Hlkr System for X32 windows desktop"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\hzdgzb
Description = "hzdgzb"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\MD ServicesB1
Description = "Thank you"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\2.exe
• %User Temp%\IEXPLORERl.exe
• %User Temp%\biz.exe
• %User Temp%\www.naver.com
• %User Temp%\27.exe
• %System%\hfblddel.bat
• %User Temp%\~pmThis.tmp
• %System%\WinHrso32.exe
• %System%\firefox.exe
• %System%\ccuwco.exe
• %Program Files%\Internet Explorer\Svcxknu.exe

Other Details

This Trojan connects to the following possibly malicious URL:

• http://www.{BLOCKED}ya.com/dkk.htm
• http://www.{BLOCKED}ya.com/din.htm

It deletes itself after execution.

This report is generated via an automated analysis system.