HackingProfessional ServicesProfessional ServicesStolen CredentialsBECData ExfiltratedTargetedIdentity (basic)Government IDFinancial accountMediumContained

Brinster & Bergman, LLP

bd_d235aead313d632a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 21, 2022

Filed

May 23, 2022

To disclose

5 weeks

Affected

2state residents only

Linked

4 filings

Confidence

66%

Full breach record for Brinster & Bergman, LLP →

Brinster & Bergman, LLP notified the NH AG of unauthorized access to client data between Jan 10-20, 2022, discovered Apr 21, 2022. Incident involved identity theft via false tax filings using names, SSNs, and bank info. 2 NH residents affected. Response included forensic investigation, password resets, and 1-year credit monitoring.

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Incident timeline

undetected · 101 days

discovery → filing · 5 weeks / 32 days

Jan 10, 2022

Begins

Apr 21, 2022

Discovered

May 23, 2022

Filed

vs. sector median

13 wks faster

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

Massachusetts State AGbd_175becfbb5c059062022-05-18 · +5dVerified
Indiana State AGbd_72e2cbebfd5a61732022-05-18 · +5dVerified
Montana State AGbd_7d3214001fc53f062022-05-15 · +8dCandidate

Name: MCDONALD HOPKINS LLC
norm: mcdonald hopkins

Name: Brinster & Bergman, LLP
norm: brinster bergman
Industry: Professional Servicesllm

Discovered: Apr 21, 2022
Breach occurred: Jan 10, 2022 – Jan 20, 2022
Undetected for: 101 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 18, 2022
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Notified the IRS
Initial access: valid_credentials

During the incident: Notified the IRS
Changed its electronic filing identification number
Changed passwords
Engaged cyber security professionals
Conducted extensive forensic investigation and manual document review
Changes made: Offering affected residents complimentary one-year membership with a credit monitoring service
Advising affected residents to remain vigilant in reviewing financial account statements
Advising affected residents about the process for placing a fraud alert and/or security freeze on their credit files
Providing contact information for consumer reporting agencies and the Federal Trade Commission
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(32 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Montana State AGMay 15 · first

Massachusetts State AG+3d

Indiana State AG+3d

New Hampshire State AG+8d · this page

Pattern: first filing May 15 (MT), last May 23 (NH) — a 8-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/brinster-bergman-20220523.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 23, 2022
Raw hash: ffd14eebf16800eb1ea24e189244f413c64f15419fddb3c09b6aecaaebc7cc2e

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityMCDONALD HOPKINS LLC

Victim entityBrinster & Bergman, LLP

Incidentdiscovered Apr 21, 2022

Stated responseNotified the IRS

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov