WORM_KUBFACE.SDH

This worm arrives by connecting affected removable drives to a system.

Arrival Details

This worm arrives by connecting affected removable drives to a system.

Installation

This worm drops the following copies of itself into the affected system and executes them:

• %Application Data%\HEX-5823-6893-6818\jutched.exe - for Windows XP and prior
• %User Profile%\Public\jutched.exe - for Windows Vista and later

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %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.)

It drops the following files:

• %System%\winrtsnr.txt

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Autostart Technique

This worm adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Java Update Manager = "%Application Data%\HEX-5823-6893-6818\jutched.exe" - for Windows XP and prior

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Java Update Manager = "%User Profile%\Public\HEX-5823-6893-6818\jutched.exe" - for Windows Vista and later

Other System Modifications

This worm creates the following registry entry(ies) to bypass Windows Firewall:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Application Data%\HEX-5823-6893-6818\jutched.exe = "%Application Data%\HEX-5823-6893-6818\jutched.exe:*:Enabled:Java Update Manager" - for Windows XP and prior

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%User Profile%\Public\HEX-5823-6893-6818\jutched.exe = "%User Profile%\Public\HEX-5823-6893-6818\jutched.exe:*:Enabled:Java Update Manager" - for Windows Vista and later

Propagation

This worm creates the following folders in all removable drives:

• {Drive Letter}:\8585485

It drops the following copy(ies) of itself in all removable drives:

• {Drive Letter}:\8585485\{folder name}s.exe

Other Details

This worm connects to the following possibly malicious URL:

• {BLOCKED}ution.nicaze.net

NOTES:

It may also arrive via instant-messaging (IM) applications.

It drops the following Shortcut (.LNK) files in all removable drives:

• {Drive Letter}:\{folder name}s.lnk

It uses the names of the folders in the removable drive to trick the user into executing a copy itself.