Semple, Marchal & Cooper, LLP
bd_dbfd45d60192b70c · schema v1 · pii pii-v1
Full breach record for Semple, Marchal & Cooper, LLP →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Interlock 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.
Source: Ransomware.live
Post text · scraped from the leak site
Semple, Marchal & Cooper, LLP is a leading regional Certified Public Accounting firm based in the Southwest, offering a range of professional services including accounting, auditing, tax planning, compliance, and management consulting. The firm is dedicated to serving various sectors such as technology, healthcare, retail, and non-profits, emphasizing innovation and personalized solutions for each client.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
May 7, 2025
Claim posted
—
Corroborated · see linked filings
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Ransomware claims (1)
- Leak Siteinterlockbd_ec0d7119d0d816132025-05-07Candidate
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
Source ceiling
- actor name
- victim claim
- ransom/leak status
- discovery date
- materiality
- notification
- affected count
- confirmed data types
- compliance clock
The ✕ fields stay blank until a regulatory filing or victim disclosure lands.
interlock
According to ransomware.live, Interlock is a ransomware group first observed in September 2024 that targets critical infrastructure sectors including healthcare, government, education, and technology across North America and Europe using double-extortion, with 57+ claimed victims including a major US dialysis provider exposing over two million patient records.