HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedPIIIdentity (basic)LowContained

Costello, Cooney & Fearon, PLLC

bd_5ede8fa2500a679f · schema v1 · pii pii-v1

Severity

Low

Discovered

May 8, 2024

Filed

Dec 10, 2024

To disclose

31 weeks

Affected

1state residents only

Linked

3 filings

Confidence

66%

Full breach record for Costello, Cooney & Fearon, PLLC →

Costello, Cooney & Fearon, PLLC notified the NH Attorney General of a data security incident. Unauthorized access occurred on March 26, 2024, detected on May 8, 2024. One NH resident's personal information was impacted. The firm engaged forensic experts, notified the FBI, and offered credit monitoring services.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 43 days

discovery → filing · 31 weeks / 216 days

Mar 26, 2024

Begins

May 8, 2024

Discovered

Dec 4, 2024

Scope determined

Dec 10, 2024

Filed

vs. sector median

+12 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_ad0bf7a3e435562a2024-12-10Verified
Montana State AGbd_fb14bde6f981add02024-12-10Candidate

Name: Costello, Cooney & Fearon, PLLC
norm: costello cooney fearon

Name: Costello, Cooney & Fearon, PLLC
norm: costello cooney fearon
Industry: Professional Servicesllm

Discovered: May 8, 2024
Breach occurred: Mar 26, 2024
Undetected for: 43 daysoccurrence → discovery
Materiality determined: Dec 4, 2024
Notification sent: Dec 10, 2024
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Notified the Federal Bureau of Investigation

During the incident: Took immediate steps to secure its digital environment
Launched an investigation
Engaged cybersecurity experts to conduct an investigation
Worked with a third-party vendor to conduct a comprehensive review of the data
Notified the Federal Bureau of Investigation
Changes made: Offering the opportunity to enroll in complimentary identity protection services through IDX
Credit monitoring and CyberScan (dark web) monitoring
$1,000,000 Insurance reimbursement policy
Fully managed identity theft recovery services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 31 weeks(216 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGDec 10 · first

Montana State AGDec 10 · first

New Hampshire State AGDec 10 · first · 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://mm.nh.gov/files/uploads/doj/remote-docs/costello-cooney-fearon-20241210.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 10, 2024
Raw hash: 463e9194b0df0c4f2019c7ef4c6186052f686ac94295f2f0eabc5a0faa6b29b6

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityCostello, Cooney & Fearon, PLLC

Victim entityCostello, Cooney & Fearon, PLLC

Incidentdiscovered May 8, 2024

Stated responseTook immediate steps to secure its digital environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov