W32/Buhtrap.D!tr.ransom
Analysis
W32/Buhtrap.D!tr.ransom is a generic detection for a Ransomware Buhtrap trojan. Since this is a generic detection, this malware may have varying behaviour.
Below are some of its observed characteristics/behaviours:
- This malware may drop any of the following file(s):
- ---README---.txt : This file is dropped all over the affected hosts drive and will serve as ransom notes.
- Affected files of this Ransomware will use the filenaming format {OriginalFileName.ext}.jumper
- This malware was also observed to affect/encrypt files located on shared drives within the same subnet.
- This malware was also observed to delete itself after execution.
- Affected victims of this Ransomware are redirected by the attacker via:
- jumper-support@countermail.com
- jumper-help@mail.com
- This malware may apply any of the following registry modification(s):
- HKCU\Software\Microsoft\Windows\Currentversion\Run
- [OriginalMalware].exe = %Appdata%\Microsoft\Windows\[OriginalMalware].exe
- HKCU\Software\Microsoft\Windows\Currentversion\Run
- Below is an illustration of the malware's Ransom notes:
- Figure 1: 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.
Telemetry
Detection Availability
FortiGate | |
---|---|
Extended | |
FortiClient | |
Extreme | |
FortiAPS | |
FortiAPU | |
FortiMail | |
Extreme | |
FortiSandbox | |
Extreme | |
FortiWeb | |
Extreme | |
Web Application Firewall | |
Extreme | |
FortiIsolator | |
Extreme | |
FortiDeceptor | |
Extreme | |
FortiEDR |