MasterCorp — March 2023 breach
Clustered 3 filings across 3 jurisdictions · filing window Apr 27, 2023 → May 31, 2023. View entity profile → Other incidents for this victim →
incident inc_996598cdc76c4742 · merged by deterministic · confidence 100%
Litigation Timing
Discovered → first regulatory filing
Days between the first leak-site claim and the first regulatory filing. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.
Time between earliest and latest filing
Not recorded for this incident
Discovery variance · Materiality delta · SEC filing delay — no SEC 8-K in this cluster; needs two dated filings.
Sensitive data
identity_governmentIncident timeline
Dashed segments are unestablished, not zero — they fill in as filings merge into this incident.
Member cascade — every filing about this breach
- APR 27Leak siteblack_basta postfirst filing · attacker claim · unverifiedoperator-confirmedday 0
- MAY 30VT AGVT AG noticeno count statedauto-linked+32d
- MAY 31MA AGMA AG noticemost recent · 3 MA residentsoperator-confirmed+33d
- Watching for additional filings — new sources merge into this incident automatically.
Roll-up facts — reconciled across members
- Breach window
- Mar 30, 2023 – Mar 31, 2023 VT AG
- Discovered
- Mar 31, 2023· 1d undetected VT AG
- Data types
- Identity (basic) · Government ID VT AG + MA AG
- Attack vector
- Unauthorized Access VT AG
Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.
Evidence ladder — rungs this incident occupies
Attacker assertion only. Establishes: claim date, group, alleged victim.
No press coverage linked yet.
Unlocks: discovery date, data types, affected count, compliance clock.
No SEC filing or victim statement yet.
Merge provenance
- Method
- deterministic
- Confidence
- 1.00 · above the 0.85 auto-merge floor
- Reviewed
- operator-reviewed Aug 22, 2026 · at least one link edge was human-adjudicated
- Audit
- Every link edge records its method, confidence and model + prompt versions (100% is the strongest edge).
Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.
Filing velocity
Spread
33 days
Cadence
~1 / 16.5d
vs. multi-state median
4.1× slower
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.
The weekly clock on records like this one
The Disclosure Clock is a weekly briefing on what landed in the disclosure record, and the gap between the criminals' post and the regulator's filing — measured on the whole record, with the method shown.
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