HackingProfessional ServicesProfessional ServicesStolen CredentialsCustomer Data InvolvedPIIIdentity (basic)LowContained

Cullenberg & Tensen, PLLC

bd_7e4eb93dd0f5d2dd · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 10, 2023

Filed

Dec 4, 2023

To disclose

24 days

Affected

1state residents only

Confidence

66%

Full breach record for Cullenberg & Tensen, PLLC →

Cullenberg & Tensen, PLLC notified NH AG of unauthorized access to one employee email account between Aug 22 and Sep 13, 2023. Discovered Nov 10, 2023. One NH resident affected. PII involved. No evidence of fraud. Credit monitoring offered.

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Incident timeline

undetected · 80 days

discovery → filing · 24 days

Aug 22, 2023

Begins

Nov 10, 2023

Discovered

Dec 4, 2023

Filed

vs. sector median

15 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: MCDONALD HOPKINS LLC
norm: mcdonald hopkins

Name: Cullenberg & Tensen, PLLC
norm: cullenberg tensen
Industry: Professional Servicesllm

Discovered: Nov 10, 2023
Breach occurred: Aug 22, 2023 – Sep 13, 2023
Undetected for: 80 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 27, 2023
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Office of the Attorney General Consumer Protection Bureau
Initial access: valid_credentials

During the incident: Began efforts to remediate the incident
Commenced a prompt and thorough investigation
Working closely with external cybersecurity professionals
Conducted extensive forensic investigation and manual document review
Provided impacted individual with complimentary credit monitoring services
Advised affected resident to remain vigilant in reviewing financial account statements
Advised affected resident about the process for placing a fraud alert and/or security freeze
Provided contact information for consumer reporting agencies and the Federal Trade Commission
Changes made: Continually evaluates and modifies practices to enhance the security and privacy of personal information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 24 days(24 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/cullenberg-tensen-20231204.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 4, 2023
Raw hash: 2fc550b5959002cc1fb3d6d22a8bd888c0c9b5595739b155e4daa48fc0db7f54

Reporting entityMCDONALD HOPKINS LLC

Victim entityCullenberg & Tensen, PLLC

Incidentdiscovered Nov 10, 2023

Stated responseBegan efforts to remediate the incident

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov