DisclosureLens
GLOBALMalwareEducationEducationRansomwareCl0pRansom DemandedActor NamedMedium

Chicago Public Schools

bd_2d9fa9fb63b68bf7 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Feb 10, 2025

To disclose

—

Affected

Not disclosed

Linked

2 filings

Confidence

50%

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Cl0p 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: EducationDiscovered: 2025-02-10
View aggregator listing on ransomware.liveView merged incident timeline

Source: Ransomware.live

Post text · scraped from the leak site

cps.k12.il.us is the official website for Chicago Public Schools (CPS), one of the biggest school systems in the U.S., located in Chicago, Illinois. It provides comprehensive information about their various programs, curriculums, school calendars, resources for students and parents, as well as staff directories. CPS's mission is to provide a high-quality public education for every child, in every neighborhood, that prepares each for success in college, career, and civic life.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Feb 10, 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

—

Compliance clock

Not assessable

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Filing propagation · 2 filings

View merged incident ↗
Illinois State AGFeb 1 · first
Leak Site+10d · this page

Pattern: first filing Feb 1 (IL), last Feb 10 — a 10-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.