Kill Security
Kill Security is a ransomware group with a financial motive, tracked by Brandefense. It targets 15 sectors, including Government and Technology, in 35 countries, including the United States and the United Kingdom.
- Killsec
- killsec Team
- Techniques
- 0
- Exploited CVEs
- No CVE data
- First seen
- Mar 21, 2024
- Last seen
- Aug 23, 2026
- Record updated
Who They Target.
About Kill Security.
KillSec originated as a hacktivist group aligned with the Anonymous movement before pivoting to ransomware operations in October 2023, officially launching a RaaS platform in June 2024 with an affiliate-friendly 88% revenue split, primarily targeting healthcare, financial services, and government sectors with over 250 documented victims as of late 2025.
Last updated Sep 22, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.