WORM_DORKBOT.BA

This worm arrives via removable drives. It may be dropped by other malware.

It also has rootkit capabilities, which enables it to hide its processes and files from the user.

Arrival Details

This worm arrives via removable drives.

It may be dropped by other malware.

Installation

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

• %User Profile%\Application Data\{random characters}.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

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
{malware file name} = "%User Profile%\Application Data\{malware file name}.exe"

Propagation

This worm creates the following folders in all removable drives:

• {drive letter}:\RECYCLER

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

• {drive letter}:\RECYCLER\{random characters}.exe

Rootkit Capabilities

This worm also has rootkit capabilities, which enables it to hide its processes and files from the user.

Other Details

This worm connects to the following URL(s) to get the affected system's IP address:

• http://api.{BLOCKED}ania.com/

NOTES:

It drops shortcut files pointing to the copy of itself in removable drives. These dropped .LNK files use the names of the folders located on the said drives for their file names. It then sets the attributes of the original folders to Hidden to trick the user into clicking the .LNK files.