WORM_AUTORUN.EUB
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Worm
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This worm arrives by connecting affected removable drives to a system. It may be unknowingly downloaded by a user while visiting malicious websites.
It drops copies of itself in all removable and physical drives found in the system. It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
TECHNICAL DETAILS
524,288 bytes
EXE
Yes
23 Aug 2011
Arrival Details
This worm arrives by connecting affected removable drives to a system.
It may be unknowingly downloaded by a user while visiting malicious websites.
Installation
This worm drops the following copies of itself into the affected system:
- %System%\ctfmem.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows 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\CurrentVersion\Run
cftmam = %System%\ctfmem.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
ctfmam = %System%\ctfmem.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
ctfmam = %System%\ctfmem.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
cftm = %System%\cftm.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
cftm = %System%\cftm.exe
HKEY_LOCAL_MACHINE\oftware\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
cftm = %System%\cftm.exe
Propagation
This worm drops copies of itself in all removable and physical drives found in the system.
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]
open={malware name}
shell\open\Command={malware name}
shell\open\Default={malware name}
shell\explore\Command={malware name}
Other Details
This worm connects to the following URL(s) to get the affected system's IP address:
- http://www.{BLOCKED}myip.com/automation/n09230945.asp