WORM_PALEVO.SMA
Windows 2000, XP, Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
232,455 bytes
EXE
Yes
04 May 2010
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