WORM_NGRBOT.VFF
Worm:Win32/Dorkbot.I (Microsoft)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm arrives via removable drives. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
Arrival Details
This worm arrives via removable drives.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This worm drops the following copies of itself into the affected system:
- %Application Data%\{random file name}
- %Application Data%\Update\Explorer.exe
(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.)
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
Windows Explorer Manager = "%Application Data%\Update\Explorer.exe"
Propagation
This worm drops the following copy(ies) of itself in all removable drives:
- {Removable Drive Letter}:\{random filename}.exe
It sets the attributes of the following items to Hidden to trick the user into clicking the .LNK files:
- {Removable Drive Letter}:\{Folder Name}
Other Details
This worm connects to the following possibly malicious URL:
- http://api.{BLOCKED}ia.com/
It deletes the initially executed copy of itself
NOTES:
It drops the following LNK files disguised as folders to trick the user into clicking them to execute the dropped copy of the worm:
- {Drive Letter}:\{Folder Name}.lnk