WORM_RIMECUD.AET

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

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:

• %User Profile%\{random file name}.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_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Taskman = "%User Profile%\{random file name}.exe"

Propagation

This worm drops copies of itself in the following drives:

• {Removable Drive}:\apple\elephant.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:

USEAUTOPLAY=1
shellexcute=apple/elephant.exe
Shellasia
shell\Explore\command=apple/elephant.exe
shell\Open\command=apple/elephant.exe
icon=apple/elephant.exe
open=apple/elephant.exe
action=0pen folder to view files using Windows Explorer

Other Details

This worm connects to the following possibly malicious URL:

• slade.{BLOCKED}number.com
• murik.{BLOCKED}tection.net.ru
• world.{BLOCKED}udio.ru
• banana.{BLOCKED}nds.su
• portal.{BLOCKED}owerbord.com