WORM_RIMECUD.FU
Trojan.Win32.Ircbrute (Ikarus), Trojan.Win32.Gibi.xe (Kaspersky), VirTool:Win32/VBInject.KR (Microsoft)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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 copies of itself in removable drives. These dropped copies use the names of the folders located on the said drives for their file names.
TECHNICAL DETAILS
290,816 bytes
EXE
Yes
14 Aug 2013
Arrival Details
This worm 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%\wfvy.exe
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
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 = "%Application Data%\wfvy.exe"
Propagation
This worm drops copies of itself in removable drives. These dropped copies use the names of the folders located on the said drives for their file names.
Dropping Routine
This worm drops the following files:
- {Removable Drive Letter}:\autorun.inf
Other Details
This worm connects to the following possibly malicious URL:
- http://tep.{BLOCKED}mod.com
- http://{BLOCKED}i.{BLOCKED}mod.com
- http://{BLOCKED}i.{BLOCKED}ol400.com