RansomwareUnknown
J
J is a ransomware group, tracked by Brandefense. It targets the Government and Technology sectors in 3 countries, including the United States and the United Kingdom.
Also known as
- J Ransomware
- Techniques
- 0
- Exploited CVEs
- No CVE data
- Record updated
Who They Target.
Sectors · 2
Countries · 3
About J.
J is an emerging ransomware group that launched its leak site in May 2025, claiming over 41 victims by late 2025 including FAI Aviation Group (Germany), operating primarily as a leak-site-centric extortion identity with limited public technical analysis.
Last updated Sep 27, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.