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  4. Trojan:W32/Reveton

Trojan:W32/Reveton

Category:Malware
Type:Trojan
Platform:W32

Summary

Trojan:W32/Reveton is a ransomware application. It fraudulently claims to be from a legitimate law enforcement authority and prevents users from accessing their infected machine, demanding that a 'fine' must be paid to restore normal access.

Disinfection


Manual Removal Instructions (Updated)

Caution: Manual disinfection is a risky process; it is recommended only for advanced users. Otherwise, please seek professional technical assistance.

  • Boot the system into Safe Mode. To do so:

    •  First, restart the system (Click Start, then Shut Down, select Restart in the drop-down dialog box that appears, then click OK).
    • As the computer restarts but before Windows launches, press F8.
    • Use the arrow keys to highlight 'Safe Mode' and then press Enter.




  • In Safe Mode, find the file ctfmon.lnk in the Startup folder (C:\Users\Username\AppData\Roaming\Microsoft\Windows\Start Menu\Program\Startup\ctfmon.lnk) and delete it.

  • Reboot the system again, this time into Normal mode.
  • Finally, run a full computer scan with F-Secure Anti-Virus. to repair any remaining files

Additional Details

Trojan:W32/Reveton is a variant in a family of ransomware applications that have been targeting European users in the last few weeks.

After the trojan successfully infects a machine, it will prevent the user from accessing the Desktop and will display a fraudulent message alleging that the system was locked by a local law enforcement authority; the specific authority mentioned varies depending on the affected user's location, though most of the samples we have seen mainly mentioned various European authorities.

The general activities of this malware, including screenshots showing the warning messages displayed by the trojan, can be seen in our Labs Weblog post discussing this topic:


Installation

Upon execution, it will create the following file:

  • On Windows XP
    %USERPROFILE%\Start Menu\Programs\Startup\<reveton_filename>.dll.lnk
  • On Windows 7
    %USERPROFILE%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\<reveton_filename>dll.lnk