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J
As of Oct 19, 2026, J has listed 38 confirmed victims on its leak site since Feb 17, 2025, 0.1% of all victims tracked by Brandefense. Its most targeted country is United States (15.8% of its victims) and its most targeted sector is Consulting.
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.
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- Confirmed Victims
- 38
- Rank By Victims
- #122
- Last Leak-Site Post
- Nov 1, 2025
- Top Country
- United States
- Top Sector
- Consulting
Victims Posted Per Month.
| Month | Confirmed victims |
|---|---|
| May 2026 | 0 |
| June 2026 | 0 |
| July 2026 | 0 |
| August 2026 | 0 |
| September 2026 | 0 |
| October 2026 (month in progress) | 0 |
| Month | Confirmed victims |
|---|---|
| November 2025 | 1 |
| December 2025 | 0 |
| January 2026 | 0 |
| February 2026 | 0 |
| March 2026 | 0 |
| April 2026 | 0 |
| May 2026 | 0 |
| June 2026 | 0 |
| July 2026 | 0 |
| August 2026 | 0 |
| September 2026 | 0 |
| October 2026 (month in progress) | 0 |
| Month | Confirmed victims |
|---|---|
| February 2025 | 3 |
| March 2025 | 7 |
| April 2025 | 3 |
| May 2025 | 5 |
| June 2025 | 6 |
| July 2025 | 3 |
| August 2025 | 2 |
| September 2025 | 7 |
| October 2025 | 1 |
| November 2025 | 1 |
| December 2025 | 0 |
| January 2026 | 0 |
| February 2026 | 0 |
| March 2026 | 0 |
| April 2026 | 0 |
| May 2026 | 0 |
| June 2026 | 0 |
| July 2026 | 0 |
| August 2026 | 0 |
| September 2026 | 0 |
| October 2026 (month in progress) | 0 |
Latest J Victims.
Search all 38 →| Victim | Country | Industry | Data claimed | Posted |
|---|---|---|---|---|
| ikad.com.au - A 5-Month Staycation in the Defense Supply Chain ikad.com.au | AUAustralia | Unknown | Not stated | |
| Dimensional Control Systems (3dcs.com) 3dcs.com | USUnited States | Unknown | 11 GB | |
| multi-media systeme AG (mmsag.de) mmsag.de | DEGermany | Unknown | 187 GB | |
| AZpro Group (azprogroup.com) azprogroup.com | USUnited States | Unknown | 198 KB | |
| Petro-Diamond (petrodiamond.com) - subsidiary of Mitsubishi Corporation petrodiamond.com | JPJapan | Unknown | Not stated | |
| raimore.com raimore.com | JPJapan | Unknown | 15 GB |
How They Operate.
J's threat actor profile lists 1 malware and tools, with its targets and related actors.
TTPs, CVEs and malware →Who J Targets.
Sectors
History.
First confirmed victim listed on its leak site
Busiest month on record: 7 confirmed victims
First seen in Brandefense data
Most recent leak-site post
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