Ransomware Intelligence / Groups / killsec3
Ransomware group
killsec3
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.
- 0claims, 7 days
- 0claims, 30 days
- 48claims, 90 days
- 2026-05-01first seen
- 2026-09-27last seen
These are claims posted by the group on its leak site, counted when we first see them. They are not confirmed incidents, and we never name a victim.
Activity, last 26 weeks
New leak-site claims per week.
In the news
Recent stories in the security press that name killsec3, newest first.
- Police Target KillSec Ransomware Group with Arrests and Seizures
- Authorities seize KillSec extortion group infrastructure, arrest 3 alleged members
- 16-year-old suspected leader of KillSec ransomware group arrested
Headlines are shown as the publisher wrote them and link to the original story. They are third-party reporting, not SecuritySnares findings. How stories are picked
Sectors claimed, last 90 days
- Unclassified 23
- Technology 6
- Financial services 5
- Healthcare 3
- Professional services 3
- Hospitality 2
- Manufacturing 2
- Retail 2
- Critical infrastructure 1
- Other 1
Countries claimed, last 90 days
- Unknown 14
- Peru 2
- Singapore 2
- United Arab Emirates 1
- Australia 1
- BD 1
- Belgium 1
- Brazil 1
- BW 1
- Canada 1
- Switzerland 1
- Chile 1
- China 1
- CU 1
- CY 1
Vulnerabilities killsec3 exploits
Our sources do not attribute specific vulnerabilities to killsec3 yet.
70% of successful ransomware attacks use remote encryption (Microsoft, 2024): files on protected servers are encrypted over the network from a device the attacker controls. Read our remote encryption briefing →
Newest vulnerabilities used by any ransomware group (CISA KEV)
| Added | CVE | Vendor / product | Vulnerability |
|---|---|---|---|
| 2026-08-18 | CVE-2026-59310 | Broadcom VMware vCenter | Broadcom VMware vCenter Path Traversal Vulnerability |
| 2026-08-05 | CVE-2026-63077 | JetBrains TeamCity | JetBrains TeamCity Deserialization of Untrusted Data Vulnerability |
| 2026-07-29 | CVE-2026-20316 | Cisco Secure Firewall Management Center (FMC) | Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability |
| 2026-07-14 | CVE-2026-15410 | SonicWall SMA1000 Appliances | SonicWall SMA1000 Appliances Code Injection Vulnerability |
| 2026-07-14 | CVE-2026-15409 | SonicWall SMA1000 Appliances | SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability |
| 2026-07-01 | CVE-2026-45659 | Microsoft SharePoint Server | Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability |
| 2026-06-25 | CVE-2026-12569 | PTC Windchill and FlexPLM | PTC Windchill and FlexPLM Improper Input Validation Vulnerability |
| 2026-06-12 | CVE-2026-35273 | Oracle PeopleSoft Enterprise PeopleTools | Oracle PeopleSoft Enterprise PeopleTools Missing Authentication for Critical Function Vulnerability |
Track killsec3 in the weekly brief
One email a week: which groups are active in your sector, what they are exploiting, and what to patch. Drafted from the data on this site and read by a human before it goes out. No sales follow-up.
Data sources: CISA KEV, Ransomchats, RansomLook, Ransomware.live, security news outlets · updated 13 hours ago
Sector, country and ransom-demand figures are SecuritySnares estimates made with a language model. Leak-site listings are claims by threat actors and are not independently verified; leak-site victims are never named unless they have disclosed the incident themselves. News headlines are the publishers' own reporting, shown as written and linked to the original. Methodology