HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDMinorMediumContained

Mohr CPAs LLP

bd_ab1197eef0c79b57 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 29, 2023

Filed

Nov 22, 2023

To disclose

8 weeks

Affected

3state residents only

Linked

5 filings

Confidence

65%

Full breach record for Mohr CPAs LLP →

Mohr CPAs LLP notified Montana residents of a security incident discovered on September 29, 2023. Unauthorized access to a server occurred via compromised email credentials, resulting in the exfiltration of client data including names, SSNs, DOBs, and driver's license numbers. The firm engaged forensic specialists and offered credit monitoring services.

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Incident timeline

discovery → filing · 8 weeks / 54 days

Sep 29, 2023

Begins

Sep 29, 2023

Discovered

Nov 22, 2023

Filed

vs. sector median

11 wks faster

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Massachusetts State AGbd_1604bcc9a26587e32023-11-22Verified
Vermont State AGbd_7bcbe0140149a87f2023-11-22Verified
New Hampshire State AGbd_ae703b097bffb8352023-11-22Verified
Maine State AGbd_cc5351b2ecbf5fa12023-11-22Verified

Name: Mohr CPAs LLP
norm: mohr cpas

Name: Mohr CPAs LLP
norm: mohr cpas
Industry: Professional Servicesllm

Discovered: Sep 29, 2023
Breach occurred: Sep 29, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 30, 2023
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government IDMinor
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: in communication with the Internal Revenue Servicein communication with Wisconsin Department of Revenuein communication with the Federation of Tax Associates
Initial access: valid_credentials

During the incident: Launched an internal investigation
Worked with third-party forensic specialists to perform a thorough investigation
Worked to secure our environment
In communication with the Internal Revenue Service, Wisconsin Department of Revenue, and the Federation of Tax Associates and have cooperated with these agencies’ investigations
Offering you access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing you with proactive fraud assistance
Changes made: Reviewing and enhancing existing policies and procedures to help prevent a similar future incident
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(54 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Massachusetts State AGNov 22 · first

Vermont State AGNov 22 · first

New Hampshire State AGNov 22 · first

Maine State AGNov 22 · first

Montana State AGNov 22 · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-883.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 22, 2023
Raw hash: 506b85542ca8aa34dd37cf3e18d53b19a5fff4ead364dba06720a713f0310d53

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityMohr CPAs LLP

Victim entityMohr CPAs LLP

Incidentdiscovered Sep 29, 2023

Stated responseLaunched an internal investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov