Alias/es

Detection Availability

Visible Symptoms

• The file commdlgdll.exe  exists in the System folder.
  
  
• The following hidden files exist in the root folders of all removable/floppy drives:
  
  
  • autorun.inf
  • driver.exe

Detailed Analysis

• Drops a copy of itself to the System folder as commdlgdll.exe.
  
  
• Creates the following registry entry to automatically execute iteself during startup:

  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    commdlg.dll = "%System%\commdlgdll.exe"

• Drops a copy of itself to all removable/floppy drives as driver.exe.
  
  
• Drops the file autorun.inf  to automatically execute its dropped copy whenever the drive is accessed. The following are the contents of this file:

  [Autorun] Open=driver.exe shellexecute=driver.exe shell\Auto\command=driver.exe Shell=Auto

Recommended Action

FortiGate Systems


• Check the main screen using the web interface for your FortiGate unit to ensure that the latest AV/NIDS database has been downloaded and installed on your system - if required, enable the 'Allow Push Update' option.
  
  FortiClient Systems
  
  
• Quarantine/delete files that are detected and replace infected files with clean backup copies.