HackingProfessional ServicesProfessional ServicesData ExfiltratedCustomer Data InvolvedGovernment IDIdentity (basic)MediumContained

St. Peter O’Brien Law Offices P.C.

bd_891d21efae04902c · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Apr 23, 2026

To disclose

—

Affected

1state residents only

Linked

3 filings

Confidence

66%

St. Peter O’Brien Law Offices P.C. notified the NH Attorney General of an incident where an unauthorized actor accessed and downloaded information from its network between September 19-23, 2025. The investigation confirmed that one New Hampshire resident's Social Security number was compromised. The firm engaged third-party forensic specialists, secured its network, and offered 12 months of credit monitoring to the affected individual. Notifications began on April 23, 2026.

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Incident timeline

Sep 19, 2025

Begins

Apr 23, 2026

Filed

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

Indiana State AGbd_8913a5baf73ba8352026-04-23Candidate
Indiana State AGbd_fb567ebb1ed8a5cc2026-04-23Candidate

Name: St. Peter O’Brien Law Offices P.C.
norm: st peter obrien law offices

Name: St. Peter O’Brien Law Offices P.C.
norm: st peter obrien law offices
Industry: Professional Servicesllm

Discovered: —
Breach occurred: Sep 19, 2025 – Sep 23, 2025
Materiality determined: —
Notification sent: Apr 23, 2026
Affected individuals: 1state-resident count only
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Unknown
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified Office of the Attorney General of New Hampshire

During the incident: Engaged third-party specialists
Launched a comprehensive investigation
Conducted a comprehensive investigation aided by third-party forensic specialists
Issued timely notification to relevant individuals and requisite regulatory authorities
Changes made: Took remediation steps to secure its network environment
Implemented additional policies and procedures to minimize the risk of a future similar matter
Offered complimentary credit monitoring and identity protection services for twelve (12) months
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 2 states

View merged incident ↗

Indiana State AGApr 23 · first

New Hampshire State AGApr 23 · 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/st-peter-obrien-law-offices-20260423.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 23, 2026
Raw hash: 4b59838e451f029a5219223bc8dbdf6424bad11c5a3b971af2e949a8f660ed72

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entitySt. Peter O’Brien Law Offices P.C.

Victim entitySt. Peter O’Brien Law Offices P.C.

IncidentUnknown

Stated responseEngaged third-party specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov