Ransomware group profile · #26 by claimed victims

Killsec ransomware

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.

Active First seen Mar 2024

285Victims claimed on leak sites

1Victims in the last 30 days

4Victims in the last 90 days

49Countries hit

1Leak-site URLs tracked, 0 online

23 Aug 2026Latest claim recorded

Victimology

Who Killsec claims to have breached, from 285 leak-site posts recorded by VULONE.

Claims per month last 12 months

Top sectors

Professional Services50

Technology50

Healthcare43

Financial Services36

Manufacturing20

Retail & E-Commerce17

Education16

Transportation15

Top countries

United States88

India50

United Kingdom11

Brazil10

Belgium8

Australia7

Mexico6

Romania6

Latest claimed victims 12 most recent

Victim	Sector	Country	Claimed
Global Go globalgo.com.pe	Transportation	PE	23 Aug 2026
cashcowboy cashcowboy.net	Financial Services	US	23 Jul 2026
Bulwark Exterminating bulwarkpestcontrol.com	Other	US	23 Jul 2026
origins ivf originsivf.com	Healthcare	IN	23 Jul 2026
csinsurance.mx csinsurance.mx	Financial Services	MX	3 Jun 2026
acehospital.in acehospital.in	Healthcare	IN	3 Jun 2026
dsdlawfirm.com dsdlawfirm.com	Professional Services	US	14 May 2026
mrs holdings mrsholdings.com	Professional Services	NG	9 May 2026
Medical PAY medical-pay.jp	Financial Services	JP	1 May 2026
hospitalvetdiadema24h.com.br hospitalvetdiadema24h.com.br	Healthcare	BR	17 Mar 2026
palram.com palram.com	Manufacturing	IL	17 Mar 2026
meena health example.com	Healthcare	—	14 Mar 2026

All 285 Killsec victims, searchable

Full victim list with claim posts, domains, timing and exports, plus the negotiation chats and leak-site screenshots VULONE archives for this crew.

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Tactics, techniques and procedures

ATT&CK technique mapping for Killsec is in progress. Victimology, infrastructure status and leak-site tracking are live above.

Indicators, detections and the full playbook

Hashes, C2 addresses, onion services, Sigma and YARA detections per technique, and the negotiation transcripts are available to signed-in analysts.

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Frequently asked

Is Killsec ransomware still active?

Killsec is tracked as active. The most recent leak-site claim VULONE recorded is dated 23 August 2026. 1 victims were claimed in the last 30 days.

How many victims has Killsec claimed?

VULONE has recorded 285 leak-site victim claims attributed to Killsec since March 2024, across 49 countries and 14 sectors.

Which industries does Killsec target?

The sectors most often named on the Killsec leak site are Professional Services, Technology, Healthcare.

Which countries are most affected by Killsec?

Most Killsec victims recorded by VULONE are located in United States, India, United Kingdom.

Where does VULONE get Killsec victim data?

Claims are collected continuously from the group's own leak sites and cross-checked with ransomware.live and RansomLook. A claim is the group's assertion, not a confirmed breach.

Other ransomware groups

Victim claims are collected from leak sites and enrichment partners (ransomware.live, RansomLook) and represent the group's own assertions, not confirmed breaches. Profile last updated 16 September 2026. Questions or corrections: [email protected].