アンビション ＤＸ ホールディングス issued its final report on the unauthorized access in August, explaining that approximately 140,000 files had been taken by the attackers and that personal information relating to approximately 580,000 records may have been leaked.
株式会社アンビションDXホールディングス issued a final report on the unauthorized access that occurred in August 2026, based on the results of a forensic investigation by an external specialist organization. Information confirmed to have been taken comprised approximately 140,000 files, while personal information relating to approximately 580,000 records may have been leaked. The intrusion is believed to have occurred via network equipment, and the report indicated the possibility that a ransomware attack was carried out after business documents were taken. In this connection, similarities with a claim of responsibility by Settra were pointed out, although the company has not identified the threat actor.
The company then disclosed the number of items by information category in its final report, stating that the data included rental and insurance contract information. It explained that similarities had been confirmed between the information categories and counts posted by Settra on its data-leak site, but that this did not provide a basis for reaching conclusions about the overall extent of the leak. The report organized the nature and scope of the impact by setting out the differences and similarities between media reports as of August and the latest final report.