TROJ_VB.JJY

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\Wilbert
• %User Profile%\LOCALS~1
• %User Temp%\nso9.tmp

(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:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Other System Modifications

This Trojan modifies the following file(s):

• %System%\MSINET.OCX

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

It deletes the following files:

• %User Temp%\nsg1.tmp
• %User Temp%\nsy5.tmp
• %User Temp%\nso9.tmp

(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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{48E59293-9880-11CF-9754-00AA00C00908}\Control

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{48E59290-9880-11CF-9754-00AA00C00908}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{48E59290-9880-11CF-9754-00AA00C00908}\1.0\
0

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{48E59293-9880-11CF-9754-00AA00C00908}\InprocServer32
ThreadingModel = "Apartment"

(Note: The default value data of the said registry entry is Apartment.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{48E59291-9880-11CF-9754-00AA00C00908}\TypeLib
Version = "1.0"

(Note: The default value data of the said registry entry is 1.0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{48E59292-9880-11CF-9754-00AA00C00908}\TypeLib
Version = "1.0"

(Note: The default value data of the said registry entry is 1.0.)

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{48E59293-9880-11CF-9754-00AA00C00908}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{48E59294-9880-11CF-9754-00AA00C00908}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{48E59295-9880-11CF-9754-00AA00C00908}

Dropping Routine

This Trojan drops the following files:

• %User Temp%\dlgh.exe
• %User Temp%\Ciara Ft. Justin Timberlake - Love Sex Magic.zip
• %User Temp%\nsy7.tmp
• %User Temp%\nso9.tmp\downloader.exe
• %User Startup%\santa.bat
• %System%\downloader.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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

This report is generated via an automated analysis system.