MalwareProfessional ServicesProfessional ServicesRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDFinancial accountHighContained

Greylock McKinnon Associates

bd_8b7ba321f28889a0 · schema v1 · pii pii-v1

Severity

High

Discovered

May 30, 2023

Filed

Apr 4, 2024

To disclose

44 weeks

Affected · nationwide

1,8411,840 in this filing

Linked

10 filings

Confidence

64%

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

Greylock McKinnon Associates, Inc. (GMA) reported a ransomware attack detected on May 30, 2023, affecting personal and Medicare information of approximately 1,841 individuals, including 1,840 New Hampshire residents. GMA, a litigation support consulting firm, received data from the U.S. Department of Justice. The breach was disclosed to the NH Attorney General on April 4, 2024, as a supplemental notice. GMA engaged forensic specialists, notified law enforcement, and is offering credit monitoring and fraud assistance to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 44 weeks / 310 days

May 30, 2023

Discovered

Apr 4, 2024

Filed

vs. sector median

+27 wks slower

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

South Carolina State AGbd_4f59e4feb1207f512024-04-05 · +1dVerified
Maine State AGbd_524d78fcdff1e19d2024-04-05 · +1dVerified
Oregon State AGbd_ba7fccfadfcbb07d2024-04-05 · +1dVerified by operator
California State AGbd_c55a125d8e9e0f582024-04-05 · +1dVerified

Show 5 more filings ↓up to 41d gap

Washington State AGbd_862de986dcc37c522024-04-16 · +12dVerified
Montana State AGbd_08e358e2c4d44d732024-02-23 · +41dCandidate
New Hampshire State AGbd_8b8abd614469d3d92024-02-23 · +41dVerified
Maine State AGbd_e0ca51cf3adad76c2024-02-23 · +41dVerified
Indiana State AGbd_ebe27468fd5864a12024-02-23 · +41dVerified

Name: Linn F. Freedman (on behalf of Greylock McKinnon Associates, Inc.)
norm: linn f freedman on behalf of greylock mckinnon associates
Domain: gma-us.com

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

Discovered: May 30, 2023
Materiality determined: —
Notification sent: Apr 5, 2024
Affected individuals: 1,841state + nationwide
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney GeneralNotified U.S. Department of Justice

During the incident: Consulted with third-party cybersecurity specialists
Notified law enforcement
Notified the DOJ
Conducted a forensic investigation
Undertook an extensive manual review of the data
Deleted DOJ data from its systems
Changes made: Offering complimentary access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services
Providing proactive fraud assistance through Identity Force (a TransUnion company)
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 44 weeks(310 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 8 states

View merged incident ↗

Montana State AGFeb 23 · first

New Hampshire State AGFeb 23 · first

Maine State AGFeb 23 · first

Indiana State AGFeb 23 · first

New Hampshire State AG+41d · this page

South Carolina State AG+42d

Maine State AG+42d

Oregon State AG+42d

California State AG+42d

Washington State AG+53d

Pattern: first filing Feb 23 (MT), last Apr 16 (WA) — a 53-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/greylock-mckinnon-20240404.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 4, 2024
Raw hash: 6007274da23a71cb0ee8ccbf6c424f1f834ffd21d45f1fe954c65b69db4c6fbf

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityLinn F. Freedman (on behalf of Greylock McKinnon Associates, Inc.)

Victim entityGreylock McKinnon Associates

Incidentdiscovered May 30, 2023

Stated responseConsulted with third-party cybersecurity specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov