Ransomware group profile · #113 by claimed victims

J ransomware

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.

Active First seen May 2025

41Victims claimed on leak sites

0Victims in the last 30 days

0Victims in the last 90 days

18Countries hit

0Leak-site URLs tracked

9 Nov 2025Latest claim recorded

Victimology

Who J claims to have breached, from 41 leak-site posts recorded by VULONE.

Claims per month last 12 months

Top sectors

Technology8

Manufacturing6

Professional Services5

Government & Defense3

Retail & E-Commerce3

Other2

Energy & Utilities2

Transportation2

Top countries

United States6

United Kingdom4

Argentina3

Germany3

India3

France3

Brazil2

Australia2

Latest claimed victims 12 most recent

Victim	Sector	Country	Claimed
ikad.com.au - A 5-Month Staycation in the Defense Supply Chain ikad.com.au	Government & Defense	AU	9 Nov 2025
**.com.au **.com.au	Not Found	—	1 Nov 2025
Dimensional Control Systems (3dcs.com) 3dcs.com	Technology	US	1 Oct 2025
multi-media systeme AG (mmsag.de) mmsag.de	Technology	DE	30 Sep 2025
AZpro Group (azprogroup.com) azprogroup.com	Professional Services	US	30 Sep 2025
Petro-Diamond (petrodiamond.com) - subsidiary of Mitsubishi Corporation petrodiamond.com	Energy & Utilities	JP	29 Sep 2025
J. E. Stacey & Co. Ltd (jestacey.com) jestacey.com	Professional Services	GB	29 Sep 2025
raimore.com raimore.com	Not Found	JP	29 Sep 2025
Virtual Projects (virtualprojects.build) virtualprojects.build	Technology	DK	29 Sep 2025
FAI Aviation Group (fai.ag) - The biggest leak ever fai.ag	Transportation	DE	23 Sep 2025
southweststone.net southweststone.net	Manufacturing	US	20 Aug 2025
a******p.com a******p.com	Not Found	—	14 Aug 2025

All 41 J 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 J 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.

See full IOCs

Frequently asked

Is J ransomware still active?

J is tracked as active. The most recent leak-site claim VULONE recorded is dated 9 November 2025.

How many victims has J claimed?

VULONE has recorded 41 leak-site victim claims attributed to J since May 2025, across 18 countries and 13 sectors.

Which industries does J target?

The sectors most often named on the J leak site are Technology, Manufacturing, Professional Services.

Which countries are most affected by J?

Most J victims recorded by VULONE are located in United States, United Kingdom, Argentina.

Where does VULONE get J 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.

VULONE research mentioning J

NASBleed: Inside a 343k-Host Credential Spill343,000 plain-text NAS and RDP logins found sitting in an open directory, most of them factory defaults. How the dump feeds access brokers, The Australian Behind Doxbin: Identifying Unindicted Co-Conspirator CC-1 AKA KTFor years, "KT" ruled Doxbin from the shadows, until a Minecraft griefer's forgotten footprints, a breached email, and one arrogant GitHub p Your Network Was Already On SaleWe analyzed 28,634 ransomware victims and the forum listings that supply their attackers. Access into a $3B company sold for $10,000. A hosp Cyberleek: Mapping the Actor Behind the Leak The Cyberleek attribution has been questioned after an analysis of the evidence surrounding the GnomodelincuenT claim. This report examines

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].