TROJ_AGENT.AVFH

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%\nsn2.tmp
• %Program Files%\Command Digital
• %Program Files%\Command Digital\AutoHook 2010
• %System Root%\Documents and Settings\Wilbert
• %Start Menu%\Programs\Command Digital
• %Start Menu%\Programs\Command Digital\AutoHook 2010
• %User Profile%\Microsoft\HTML Help

(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).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

Other System Modifications

This Trojan deletes the following files:

• %User Temp%\nsi1.tmp
• %User Temp%\nsn2.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\Microsoft\
Windows\CurrentVersion\Uninstall\
AutoHook 2010

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
AutoHook 2010
DisplayName = "AutoHook 2010"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
AutoHook 2010
UninstallString = "%Program Files%\Command Digital\AutoHook 2010\uninstall autohook 2010.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
AutoHook 2010
DisplayVersion = "v1.0.1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
AutoHook 2010
Publisher = "Command Digital Studios"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
AutoHook 2010
InstallLocation = "%Program Files%\Command Digital\AutoHook 2010"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\nsn2.tmp\modern-header.bmp
• %User Temp%\nsn2.tmp\modern-wizard.bmp
• %User Temp%\nsn2.tmp\nsDialogs.dll
• %User Temp%\nsn2.tmp\System.dll
• %Program Files%\Command Digital\AutoHook 2010\AutoHook 2010.exe
• %Program Files%\Command Digital\AutoHook 2010\AutoHook 2010.dll
• %Program Files%\Command Digital\AutoHook 2010\AutoHook Help.chm
• %Program Files%\Command Digital\AutoHook 2010\AutoHook 2010 EULA.rtf
• %Start Menu%\Programs\Command Digital\AutoHook 2010\AutoHook 2010.lnk
• %Start Menu%\Programs\Command Digital\AutoHook 2010\AutoHook Help.lnk
• %Program Files%\Command Digital\AutoHook 2010\uninstall autohook 2010.exe
• %Program Files%\Command Digital\AutoHook 2010\AutoHook 2010.ini
• %User Startup%\AutoHook 2010.lnk
• %User Profile%\HTML Help\hh.dat

(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).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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.. %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.)

This report is generated via an automated analysis system.