HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedGovernment IDIdentity (basic)HighContained

GRANT THORNTON LLP

bd_618fec45c9ed840c · schema v1 · pii pii-v1

Severity

High

Discovered

Aug 2, 2023

Filed

Sep 19, 2023

To disclose

7 weeks

Affected · nationwide

6,242135 in this filing

Linked

4 filings

Confidence

66%

Full breach record for GRANT THORNTON LLP →2 incidents on file

Grant Thornton LLP reported an external system breach (hacking) occurring on April 19, 2023, discovered on August 2, 2023. The incident affected 6,242 individuals, including 135 Maine residents. Personal information acquired included names and Social Security Numbers. Grant Thornton provided written notification and offered one year of credit monitoring services through Kroll.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Aug 2, 2023 → Filed with AG Sep 19, 202348d ⏱ ME AG >30d7 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 105 days

discovery → filing · 7 weeks / 48 days

Apr 19, 2023

Begins

Aug 2, 2023

Discovered

Sep 19, 2023

Filed

vs. sector median

12 wks faster

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Indiana State AGbd_170e74d75f5fa0702023-09-19Verified
California State AGbd_17cad5b1f2afa8e12023-09-19Candidate
Massachusetts State AGbd_6c4427903eea7a9e2023-09-19Verified

Name: GRANT THORNTON LLP
norm: grant thornton

Name: GRANT THORNTON LLP
norm: grant thornton
Industry: Professional Servicesllm

Discovered: Aug 2, 2023
Breach occurred: Apr 19, 2023
Undetected for: 105 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 19, 2023
Affected individuals: 6,242state + nationwide
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Initial access: exploit_public_facing

During the incident: Sent written notification to affected individuals
Offered 1 Year credit monitoring services through Kroll
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(48 days from discovery to filing)
Compliance flags: ME AG >30d · 48d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Aug 2, 2023
→ Filed with AG: Sep 19, 2023
48d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Aug 2, 2023 → Filed with AG: Sep 19, 2023	48d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Indiana State AGSep 19 · first

California State AGSep 19 · first

Massachusetts State AGSep 19 · first

Maine State AGSep 19 · 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-a1252b4f8318/5a205f5a-62de-47a5-902d-3c53c3948c89.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 19, 2023
Raw hash: 34e931fdaeca72cbcf3a2caf4d5ae9a73eb5e7d1605c38d931dbc0b13215d1b0

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityGRANT THORNTON LLP

Victim entityGRANT THORNTON LLP

Incidentdiscovered Aug 2, 2023

Stated responseSent written notification to affected individuals

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov