HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Tsao & McKown Architects

bd_5ea4c06f13d22c16 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 19, 2021

Filed

Dec 2, 2021

To disclose

19 weeks

Affected

1state residents only

Linked

3 filings

Confidence

66%

Full breach record for Tsao & McKown Architects →

Tsao & McKown Architects, a Brooklyn-based architecture firm, notified the NH Attorney General of a data security incident. On July 19, 2021, the firm experienced a network disruption and discovered unauthorized access by an unknown actor. The investigation determined that personal information, including names and Social Security numbers, of one New Hampshire resident may have been accessed. The firm engaged cybersecurity experts, reported the incident to the FBI, implemented additional security features, and offered 12 months of credit monitoring to the affected individual.

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Incident timeline

discovery → filing · 19 weeks / 136 days

Jul 19, 2021

Begins

Jul 19, 2021

Discovered

Dec 2, 2021

Filed

vs. sector median

on median

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

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Maine State AGbd_803e2f90298a05672021-12-02Candidate
Massachusetts State AGbd_bc5c44a09efc8b662021-12-02Verified

Name: Tsao & McKown Architects
norm: tsao mckown architects

Name: Tsao & McKown Architects
norm: tsao mckown architects
Industry: Professional Servicesllm

Discovered: Jul 19, 2021
Breach occurred: Jul 19, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 1, 2021
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Attorney GeneralReported to the Federal Bureau of Investigation

During the incident: Took steps to secure its environment
Engaged cybersecurity experts to assist with an investigation
Reported this matter to the Federal Bureau of Investigation
Offered the affected individuals twelve (12) months of credit monitoring and identity remediation services through notification services vendor, IDX
Changes made: Implemented additional security features in an effort to prevent similar incidents from occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 19 weeks(136 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 ↗

Maine State AGDec 2 · first

Massachusetts State AGDec 2 · first

New Hampshire State AGDec 2 · 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/tsao-mckown-architects-20211202.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 2, 2021
Raw hash: fafba79348e62dd93a4b390abfb1a8b8a6a1de45d17c3bc11f7bda0a8e417374

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityTsao & McKown Architects

Victim entityTsao & McKown Architects

Incidentdiscovered Jul 19, 2021

Stated responseTook steps to secure its environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov