WORM_VBNA.SMR

This worm arrives via removable drives.

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

However, as of this writing, the said sites are inaccessible.

Arrival Details

This worm arrives via removable drives.

Installation

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

• %User Profile%\{random file name}.exe

(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.)

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
{random file name} = "%User Profile%\{random file name}.exe"

Other System Modifications

This worm modifies the following registry entries to hide files with Hidden attributes:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = 0

(Note: The default value data of the said registry entry is 1.)

Propagation

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

• {random file name}.exe
• {random file name}x.exe
• x.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:

[autOruN]
action=Open folder to view files
shELlEXeCuTe={random file name}.EXE
icON=%SYStEMrOOt%\systEm32\shElL32.DLl,4
useAUToplay=1

Other Details

This worm connects to the following possibly malicious URL:

• {BLOCKED}4.{BLOCKED}geparlour.net:8000

However, as of this writing, the said sites are inaccessible.