DisclosureLens
GLOBALMalwareProfessional ServicesProfessional ServicesRansomwareBlack BastaRansom DemandedActor NamedMedium

MasterCorp

bd_f7a0a5ed0c870133 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Apr 27, 2023

To disclose

—

Affected

Not disclosed

Linked

3 filings

Confidence

50%
Full breach record for MasterCorp →

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Black Basta 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: 2023-04-27
View aggregator listing on ransomware.liveView merged incident timeline

Source: Ransomware.live

Post text · scraped from the leak site

MasterCorpBusiness Services · Tennessee, United States · 1,000 EmployeesHeadquarters 3505 N Main St, Crossville, Tennessee, 38555, United StatesPhone Number (931) 484-1752Website www.mastercorp.comRevenue $217.8MA leader in cleanliness since 1981, today MasterCorp is considered the most trusted name in hospitality services. We partner with premier resorts and developers nationwide and lead the industry, not only in size, but in innovation, performance, and customer satisfaction.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Apr 27, 2023

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

—

Compliance clock

Not assessable

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Filing propagation · 3 filings · 2 states

View merged incident ↗
Leak SiteApr 27 · first · this page
Vermont State AG+32d
Massachusetts State AG+33d

Pattern: first filing Apr 27, last May 31 (MA) — a 33-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claimThis record

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

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.