WORM_PALEVO.SMA

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

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected 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:

• %System Root%\RECYCLER\{SID}\{random filename}.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It drops the following files:

• %System Root%\RECYCLER\{SID}\Desktop.ini

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

It creates the following folders:

• %System Root%\RECYCLER\{SID}

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Taskman = %System Root%\RECYCLER\{SID}\{random filename}.exe

Propagation

This worm creates the following folders in all removable drives:

• {random folder}

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

• {random folder}\{random filename}.exe

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

The said .INF file contains the following strings:

{garbage}
[autorun
{garbage}
open=vircure/vircure32.exe
{garbage}
icon=%SystemRoot%\system32\SHELL32.dll,4
;{garbage}
action=Open folder to view files using Windows Explorer
;{garbage}
USEAUToplay=1
;{garbage}
shell\open\\command=vircure/vircure32.exe
;{garbage}
shell\\explore\command=vircure/vircure32.exe
{garbage}

NOTES:
It drops the following component file(s) in all removable drives:

• {random folder}\Desktop.ini