HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedGovernment IDIdentity (basic)HighContained

ARTHUR J. GALLAGHER & CO.

bd_c453899ab04861cb · schema v1 · pii pii-v1

Severity

High

Discovered

Jun 23, 2021

Filed

Sep 8, 2021

To disclose

11 weeks

Affected · nationwide

5,5772 in this filing

Confidence

64%

Full breach record for ARTHUR J. GALLAGHER & CO. →31 incidents on file

Arthur J. Gallagher & Co. reported an external system breach (hacking) occurring between June 3, 2020, and September 26, 2020, discovered on June 23, 2021. The incident affected 5,577 individuals, including 2 Maine residents. Acquired data included names and Social Security Numbers. The company provided written notification and offered 24 months of identity theft protection services via Kroll.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Jun 23, 2021 → Filed with AG Sep 8, 202177d ⏱ ME AG >30d11 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 · 385 days

discovery → filing · 11 weeks / 77 days

Jun 3, 2020

Begins

Jun 23, 2021

Discovered

Sep 8, 2021

Filed

vs. sector median

7 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed5,577 affectedView incident

Name: ARTHUR J. GALLAGHER & CO.
norm: arthur j gallagher

Name: ARTHUR J. GALLAGHER & CO.
norm: arthur j gallagher
Industry: Professional Servicesllm

Discovered: Jun 23, 2021
Breach occurred: Jun 3, 2020 – Sep 26, 2020
Undetected for: 385 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 21, 2021
Affected individuals: 5,577state + 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 24 months of identity theft protection services through Kroll
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(77 days from discovery to filing)
Compliance flags: ME AG >30d · 77d
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: Jun 23, 2021
→ Filed with AG: Sep 8, 2021
77d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Jun 23, 2021 → Filed with AG: Sep 8, 2021	77d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

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/b583961f-33ad-4ebe-b4fc-5b8cdd3076f0.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 8, 2021
Raw hash: ee8f90dae9073f9698667b80237bd083122d6558c193a9494cb38fa1cb226bd3

Reporting entityARTHUR J. GALLAGHER & CO.

Victim entityARTHUR J. GALLAGHER & CO.

Incidentdiscovered Jun 23, 2021

Stated responseSent written notification to affected individuals

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov