HackingProfessional ServicesProfessional ServicesData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHighActive

GNAC

bd_5509753a5153a7b4 · schema v1 · pii pii-v1

Severity

High

Discovered

Sep 21, 2017

Filed

Nov 13, 2017

To disclose

8 weeks

Affected

4,026state residents only

Confidence

64%

Full breach record for GNAC →

Gallagher NAC notified Montana and other states of a data breach involving names and SSNs of organization members. Unauthorized access occurred between June 18 and Sept 19, 2017, detected Sept 21, 2017. Notices sent Oct 25, 2017. Forensic investigation ongoing. No confirmed misuse.

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Incident timeline

undetected · 95 days

discovery → filing · 8 weeks / 53 days

Jun 18, 2017

Begins

Sep 21, 2017

Discovered

Nov 13, 2017

Filed

vs. sector median

11 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed4,026 affectedView incident

Name: Gallagher NAC
norm: gallagher nac

Name: GNAC
norm: gnac
Industry: Professional Servicesllm

Discovered: Sep 21, 2017
Breach occurred: Jun 18, 2017 – Sep 19, 2017
Undetected for: 95 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 25, 2017
Affected individuals: 4,026state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Reporting this incident to law enforcementProvided notice to state regulators and consumer reporting agencies
Initial access: exploit_public_facing

During the incident: Disabled the web application
Launched an investigation
Retained a leading third-party forensic investigation firm
Provided notice to [DATA OWNER]
Reporting this incident to law enforcement
Provided notice to state regulators and consumer reporting agencies
Changes made: Offering identity theft protection services through ID Experts
Providing 12 months of credit monitoring
Providing a $1,000,000 insurance reimbursement policy
Providing fully managed id theft recovery services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(53 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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://dojmt.gov/wp-content/uploads/GNAC.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 13, 2017
Raw hash: befb4fea9ae9dc4a381d572539cca1ff8bc384d7ff468dae18d4c4bc76f1aba1

Reporting entityGallagher NAC

Victim entityGNAC

Incidentdiscovered Sep 21, 2017

Stated responseDisabled the web application

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov