TROJ_YODDOS.BC

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.

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 creates the following folders:

• %System Root%\DOCUME~1
• %System Root%\DOCUME~1\ADMINI~1
• %User Profile%\LOCALS~1
• %User Temp%\RarSFX0

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %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:

• 8.txt

Dropping Routine

This Trojan drops the following files:

• __tmp_rar_sfx_access_check_41187
• WinHe806.exe
• He801.exe
• ser.vbs
• WinHe802.exe
• WinHe805.exe
• %System%\WinHe805.exe
• %System%\WinHe802.exe
• %System%\WinHe801.exe
• %System%\WinHe806.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://www.{BLOCKED}y.com/ad1in.htm
• http://www.{BLOCKED}y.com/ad1in.htm
• http://www.{BLOCKED}y.com/ad1in.htm

This report is generated via an automated analysis system.