HackingGovernmentGovernmentData ExfiltratedTargetedIdentity (basic)Government IDCriticalContained

Thornton Township

bd_3a65aadb8cd96c6f · schema v1 · pii pii-v1

Severity

Critical

Discovered

Mar 18, 2025

Filed

Apr 20, 2026

To disclose

13 months

Affected · nationwide

153,6171 in this filing

Linked

2 filings

Confidence

66%

Full breach record for Thornton Township →2 incidents on file

Thornton Township (IL) reported an external system breach (hacking) occurring between March 10-18, 2025. The incident was discovered on March 18, 2025, and notifications were sent on April 9, 2026. Approximately 153,617 individuals were affected, including 1 Maine resident. Personal information, including names and government identifiers, was potentially acquired. The FBI was notified, and IDX credit monitoring services were offered.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Mar 18, 2025 → Filed with AG Apr 20, 2026398d ⏱ ME AG >30d13 months discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 8 days

discovery → filing · 13 months / 398 days

Mar 10, 2025

Begins

Mar 18, 2025

Discovered

Apr 20, 2026

Filed

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

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_ad2fd49bf7f630182026-04-20Verified

Name: Thornton Township
norm: thornton township
Industry: government_public

Name: Thornton Township
norm: thornton township
Industry: government_public
Industry: Governmentllm

Discovered: Mar 18, 2025
Breach occurred: Mar 10, 2025 – Mar 18, 2025
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 9, 2026
Affected individuals: 153,617state + nationwide
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified the Federal Bureau of Investigation
Initial access: exploit_public_facing

During the incident: Launched an investigation with the support of external cybersecurity experts
Took steps to secure our network environment
Notified the Federal Bureau of Investigation
Offering you the opportunity to enroll in complimentary credit monitoring and identity theft protection services through IDX
Changes made: Implementing enhanced security measures to help prevent a similar incident from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 months(398 days from discovery to filing)
Compliance flags: ME AG >30d · 398dME resident >60d · 387d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Mar 18, 2025
→ Filed with AG: Apr 20, 2026
398d 30 days (soft) ME AG >30d
Maine
Discovered: Mar 18, 2025
→ Notified: Apr 9, 2026
387d 60 days (analyst band; statutory cap is 30 days) ME resident >60d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Mar 18, 2025 → Filed with AG: Apr 20, 2026	398d	30 days (soft)	ME AG >30d
Maine	Discovered: Mar 18, 2025 → Notified: Apr 9, 2026	387d	60 days (analyst band; statutory cap is 30 days)	ME resident >60d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGApr 20 · first

Maine State AGApr 20 · first · this page

Evidence ladder

Leak-site claim

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

Press / market report

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

State AG / regulator filingThis record

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

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/b6fcf3a9-ae08-4378-9fb1-b7b1111427ad.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 20, 2026
Raw hash: 17e73da82174e8a0a516fee449f41e3e0bed84585612408a13d6393e5fb5bae5

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityThornton Township

Victim entityThornton Township

Incidentdiscovered Mar 18, 2025

Stated responseLaunched an investigation with the support of external cybersecurity experts

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov