WORM_AUTORUN.HUV

This worm 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 worm 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 worm creates the following folders:

• %User Temp%\E_N4
• %System%\372109
• %System%\499E86
• %System%\2B4FA4
• %System%\A9C3FF

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

Other System Modifications

This worm deletes the following files:

• %User Profile%\Cookies\index.dat
• %Temporary Internet Files%\Content.IE5\09RWHJQN\desktop.ini
• %Temporary Internet Files%\Content.IE5\BVLBNMKH\desktop.ini
• %Temporary Internet Files%\Content.IE5\desktop.ini
• %Temporary Internet Files%\Content.IE5\index.dat
• %Temporary Internet Files%\Content.IE5\ZDGZNKA5\desktop.ini
• %Temporary Internet Files%\Content.IE5\ZSGKJKO6\desktop.ini
• %Temporary Internet Files%\desktop.ini
• %User Profile%\History.IE5\index.dat

(Note: %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.. %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista and 7.)

It deletes the following folders:

• %User Profile%\History\History.IE5

(Note: %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.)

Dropping Routine

This worm drops the following files:

• %User Temp%\E_N4\krnln.fnr
• %User Temp%\E_N4\HtmlView.fne
• %User Temp%\E_N4\internet.fne
• %User Temp%\E_N4\eAPI.fne
• %User Temp%\E_N4\dp1.fne
• %User Temp%\E_N4\shell.fne
• %User Temp%\E_N4\spec.fne
• %User Temp%\E_N4\cnvpe.fne
• %System%\372109\C00285.EXE
• %System%\499E86\RegEx.fnr
• %User Startup%\C00285.lnk
• %System%\499E86\cnvpe.fne
• %System%\499E86\dp1.fne
• %System%\499E86\eAPI.fne
• %System%\499E86\HtmlView.fne
• %System%\499E86\internet.fne
• %System%\499E86\krnln.fnr
• %System%\499E86\shell.fne
• %System%\499E86\spec.fne

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

This report is generated via an automated analysis system.