HackingProfessional ServicesProfessional ServicesTargetedIdentity (basic)Government IDHighContained

Greylock McKinnon Associates

bd_790022af687f4060 · schema v1 · pii pii-v1

Severity

High

Discovered

May 30, 2023

Filed

Jun 28, 2024

To disclose

13 months

Affected · nationwide

4,9506 in this filing

Linked

4 filings

Confidence

66%

Full breach record for Greylock McKinnon Associates →4 incidents on file

Greylock McKinnon Associates, Inc. (GMA) notified individuals of a security incident occurring on May 30, 2023, where an external system breach (hacking) may have exposed names, addresses, and Social Security numbers. GMA engaged third-party cybersecurity specialists and notified law enforcement. Notices were sent on June 28, 2024, offering 12 months of Experian IdentityWorks. 4,950 individuals were affected, including 6 Maine residents.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered May 30, 2023 → Filed with AG Jun 28, 2024395d ✗ ME AG >90d13 months discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 13 months / 395 days

May 30, 2023

Begins

May 30, 2023

Discovered

Jun 28, 2024

Filed

vs. sector median

+39 wks slower

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

California State AGbd_c834268ced33fa4f2024-06-28Candidate
Indiana State AGbd_ea8903fb7483d4252024-06-28Verified
New Hampshire State AGbd_4a2dc486a8f38bcb2024-06-27 · +1dVerified

Name: ROBINSON & COLE LLP
norm: robinson cole

Name: Greylock McKinnon Associates
norm: greylock mckinnon associates
Domain: gma-us.com
Industry: professional_services
Industry: Professional Servicesllm

Discovered: May 30, 2023
Breach occurred: May 30, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 28, 2024
Affected individuals: 4,950state + nationwide
Data types: Identity (basic)Government ID
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

During the incident: Consulted with third-party cybersecurity specialists to assist with our response to the incident
Notified law enforcement
Changes made: Offered complimentary access to Experian IdentityWorks for 12 months
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 months(395 days from discovery to filing)
Compliance flags: ME AG >90d · 395dME resident >180d · 395d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: May 30, 2023
→ Filed with AG: Jun 28, 2024
395d 90 days ME AG >90d
Maine
Discovered: May 30, 2023
→ Notified: Jun 28, 2024
395d 180 days ME resident >180d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: May 30, 2023 → Filed with AG: Jun 28, 2024	395d	90 days	ME AG >90d
Maine	Discovered: May 30, 2023 → Notified: Jun 28, 2024	395d	180 days	ME resident >180d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

New Hampshire State AGJun 27 · first

California State AG+1d

Indiana State AG+1d

Maine State AG+1d · 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-a1252b4f8318/3113fde2-bef0-4b1c-a8b7-35523185e6f3.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 28, 2024
Raw hash: 44e4873df208a010c9223e04077859a9b5971d418d37cabd10c7d47544738614

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityROBINSON & COLE LLP

Victim entityGreylock McKinnon Associates

Incidentdiscovered May 30, 2023

Stated responseConsulted with third-party cybersecurity specialists to assist with our response to the incident

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov