GLOBALMalwareProfessional ServicesProfessional ServicesRansomwareALPHVRansom DemandedActor NamedOFAC SanctionedCritical
Kumagai Gumi Group
bd_9b1ccd1691f20355 · schema v1 · pii pii-v1
Full breach record for Kumagai Gumi Group →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group ALPHV / BlackCat on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.
Group activity: Business ServicesDiscovered: 2024-03-01
Source: Ransomware.live
Post text · scraped from the leak site
Kumagai Gumi Co., Ltd. is a Japanese construction company founded in Fukui, Fukui Prefecture, Japan. The company still has registered headquartersin Fukui, but the actual head office is located in Shinjuku, Tokyo
Tracked as a single-filing incident — the only disclosure on record for this event so far.Unverified claimView incident
No regulatory filing corroborates this yet. If an SEC 8-K, state-AG notice, or victim statement lands, DisclosureLens will merge it into an incident and link it here.
Source provenance
- Source URL
- https://www.ransomware.live/
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- Mar 1, 2024
- Raw hash
- 2aa63ea26ba6cbe528f0df8cab87c1c8e0710206807da21468d15c890ea490a1
Reporting entity
- Name
- alphv
Victim entity
- Name
- Kumagai Gumi Groupnorm: kumagai gumi
- Domain
- kumagaigumi.co.jp
- Industry
- Professional Services
What this source establishes
- Source ceiling
- A leak-site claim can't tell us: discovery date · materiality · notification · affected count · confirmed data types · compliance clock. These stay blank until a regulatory filing or victim disclosure lands.
- Attack vector
- Ransomware· alphv
- Threat actor
- ALPHVExternalFinancial
Compliance
- Compliance flags
- — (clock not assessable for this source)
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.