TROJ_ZLOB.DJQ

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%\nsn5.tmp
• %Program Files%\Video ActiveX Object

(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.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

Other System Modifications

This Trojan deletes the following files:

• %User Temp%\nsh1.tmp
• %User Temp%\nsn5.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_CURRENT_USER\Software\Internet Security

HKEY_CLASSES_ROOT\videoaccessactivex.Chl\CLSID

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Internet Security
Type = "3"

HKEY_CURRENT_USER\Software\Internet Security
Path = "%Program Files%\Video ActiveX Object"

HKEY_CURRENT_USER\Software\Internet Security
Removable = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object
ProductionEnvironment = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object
DisplayName = "Video ActiveX Object 2.07"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object
UninstallString = "%Program Files%\Video ActiveX Object\uninst.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object
DisplayIcon = "%Program Files%\Video ActiveX Object\uninst.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object
DisplayVersion = "2.07"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object
URLInfoAbout = "www.mediaobjectsource.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Video ActiveX Object
Publisher = "Video ActiveX Object Software"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\nsh3.tmp
• %User Temp%\nsn5.tmp\reuninstall.ini
• %User Temp%\nsn5.tmp\ioSpecial.ini
• %User Temp%\nsn5.tmp\modern-wizard.bmp
• %User Temp%\nsn5.tmp\modern-header.bmp
• %User Temp%\nsn5.tmp\sxs.dll
• %Program Files%\Video ActiveX Object\uninst.exe
• %User Temp%\nsn5.tmp\InstallOptions.dll

(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.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

This report is generated via an automated analysis system.