Victim Claim
Yaomasa
● Listed in the last 48h
Claimed by
AiLock
Listed on leak site
13 Aug 2026
Reported attack date
13 Aug 2026
Group claims tracked
25
Unverified claim.
This entry reproduces a listing published by the AiLock group on its own extortion site.
Attackers routinely exaggerate or fabricate victims. Nothing here confirms that
Yaomasa suffered a breach, or what data was actually taken.
About the organisation
Yaomasa is a Japanese supermarket chain founded in 1919 that offers fresh foods, general groceries, and daily necessities, while also operating TSUTAYA and BOOKOFF franchise stores as part of its cultural division.
What the listing means
Yaomasa appeared on the AiLock leak site on 13 August 2026. Groups publish a victim once negotiations stall or as pressure during them, so a listing usually means data was already exfiltrated. This group has published 5 claims in the last 30 days and remains active.
Recommended actions
- Treat any unsolicited message referencing Yaomasa as suspicious — leaked data gets weaponised for phishing within days.
- If you hold an account on yaomasa.com, change that password now, update it anywhere you reused it, and enable two-factor authentication.
- Watch for follow-on extortion: stolen data is often re-leaked or resold after the initial listing.
- A leak-site listing is a claim made by the attacker, not a confirmed breach — check the organisation's own disclosures before acting on it.
Leak-site evidence
Listing URL https://www.ransomware.live/id/WWFvbWFzYUBBaUxvY2s=