WORM_VBNA.SMR
Worm:Win32/Vobfus.Y (Microsoft), W32.Changeup (Symantec), Downloader-CJX.gen.g (McAfee), Worm.Win32.VBNA.alpv (Kaspersky)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
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.