MSIL/Jigsaw.MBD8!tr.ransom

Analysis

MSIL/Jigsaw.MBD8!tr.ransom is a generic detection for Ransomware Jigsaw.

• This is a .Net version for Ransomware Jigsaw which has the same characteristics/behaviours as:W32/Jigsaw.M!tr.ransom.

Below is an illustration of the malware's Ransom notes:

Figure 1: Ransom note.

Figure 2: Ransom note.

Recommended Action

• Make sure that your FortiGate/FortiClient system is using the latest AV database.
• Quarantine/delete files that are detected and replace infected files with clean backup copies.