MalwareProfessional ServicesFinancial ServicesProfessional ServicesRansomwareData ExfiltratedRansom DemandedPIIIdentity (basic)LowContained

ARTHUR J. GALLAGHER & CO.

bd_0a8493ab619ce7b0 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 26, 2020

Filed

Aug 4, 2021

To disclose

45 weeks

Affected

4state residents only

Linked

30 filings

Confidence

66%

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

Supplemental notice to NH AG regarding Arthur J. Gallagher & Co. ransomware incident. Unauthorized access occurred June 3-Sept 26, 2020. Discovered Sept 26, 2020. 4 NH residents affected. Data included PII. Response included forensic investigation, system isolation, and 24-month credit monitoring via Kroll.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 115 days

discovery → filing · 45 weeks / 312 days

Jun 3, 2020

Begins

Sep 26, 2020

Discovered

Aug 4, 2021

Filed

vs. sector median

+27 wks slower

This filing is one of 30 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

South Carolina State AGbd_46c22c0e135074c12021-08-17 · +13dVerified
Delaware State AGbd_4802bf691a0b05cf2021-08-17 · +13dVerified
South Carolina State AGbd_5a60d99cfc68d2f62021-08-17 · +13dVerified
Delaware State AGbd_d559ecce5b3385332021-08-19 · +15dVerified

Show 6 more filings ↓up to 61d gap

New Hampshire State AGbd_7a32a3fe8539d6192021-08-23 · +19dVerified
New Hampshire State AGbd_e05a56a536c799dd2021-09-07 · +34dVerified
South Carolina State AGbd_e1bf416a552091df2021-09-08 · +35dVerified
New Hampshire State AGbd_128a2682206fdf792021-09-13 · +40dVerified
South Carolina State AGbd_97dcb7179082a9e82021-09-30 · +57dVerified
New Hampshire State AGbd_544b44357c05bc6c2021-10-04 · +61dVerified

Showing first 10 of 29 linked disclosures.

Name: Mullen Coughlin LLC
norm: mullen coughlin

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

Discovered: Sep 26, 2020
Breach occurred: Jun 3, 2020 – Sep 26, 2020
Undetected for: 115 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 30, 2021
Affected individuals: 4state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: reported this incident to law enforcement and regulatory authorities

During the incident: Took all our systems offline as a precautionary measure
Initiated response protocols
Launched an investigation with the assistance of third-party cybersecurity and forensic specialists
Implemented our business continuity plans
Reported this incident to law enforcement and regulatory authorities
Providing you access, at no cost, to identity and credit monitoring services for twenty-four months through Kroll
Changes made: Reviewed existing security policies and implemented additional measures and enhanced security tools
Implemented additional safeguards and are providing additional training to our employees on data privacy and security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 45 weeks(312 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 3 states

View merged incident ↗

New Hampshire State AGAug 4 · first · this page

South Carolina State AG+13d

Delaware State AG+13d

South Carolina State AG+13d

Delaware State AG+15d

New Hampshire State AG+19d

New Hampshire State AG+34d

South Carolina State AG+35d

New Hampshire State AG+40d

South Carolina State AG+57d

New Hampshire State AG+61d

Pattern: first filing Aug 4 (NH), last Oct 4 (NH) — a 61-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 29 — the full spread may be wider.

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://mm.nh.gov/files/uploads/doj/remote-docs/advanced-technology-ventures-lightstone-ventures-20210804.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 4, 2021
Raw hash: fa3d8f7b4e68b89983b43aafbc5058838f9da5b208ff222a17c333430be2d954

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityARTHUR J. GALLAGHER & CO.

Incidentdiscovered Sep 26, 2020

Stated responseTook all our systems offline as a precautionary measure

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov