HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedMulti-Stage ChainGovernment IDIdentity (basic)Financial accountMinorMediumContained

Mohr CPAs LLP

bd_ae703b097bffb835 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 29, 2023

Filed

Nov 22, 2023

To disclose

8 weeks

Affected

Not disclosed

Linked

5 filings

Confidence

65%

Full breach record for Mohr CPAs LLP →

Mohr CPAs LLP discovered suspicious activity related to a member's email account on September 29, 2023. An investigation determined that an unauthorized party accessed a server on that date and exfiltrated files containing client information, including Social Security numbers and financial data. The firm notified the IRS, FTA, and Wisconsin Department of Revenue, and is offering credit monitoring to affected individuals.

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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
Montana State AGbd_ab1197eef0c79b572023-11-22Candidate
Maine State AGbd_cc5351b2ecbf5fa12023-11-22Verified

Name: Mohr CPAs LLP
norm: mohr cpas
Domain: mohrpartners.com

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 22, 2023
Affected individuals: Not disclosed
Data types: Government IDIdentity (basic)Financial accountMinor
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 ChannelT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Notified the Internal Revenue Service (IRS)Notified the Federation of Tax Administrators (FTA)Notified the Wisconsin Department of RevenueCooperated with these agencies’ investigations
Initial access: valid_credentials

During the incident: Launched an internal investigation
Worked with third-party forensic specialists to perform a thorough investigation
Notified the Internal Revenue Service (IRS)
Notified the Federation of Tax Administrators (FTA)
Notified the Wisconsin Department of Revenue
Provided access to credit monitoring services through Transunion at no cost
Provided impacted individuals with guidance on how to better protect against identity theft and fraud
Provided individuals with information on how to place a fraud alert and security freeze on one’s credit file
Provided information on protecting against tax fraud
Provided contact details for the national consumer reporting agencies
Provided information on how to obtain a free credit report
Provided encouragement to contact the Federal Trade Commission, their state Attorney General, and law enforcement to report attempted or actual identity theft and fraud
Provided written notice of this incident to relevant state and federal regulators
Provided written notice to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Working to implement additional safeguards and training to its employees
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

Montana State AGNov 22 · first

Maine State AGNov 22 · first

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/mohr-cpas-20231122.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: 2c5205e9d3a2aaeb2e16a19e404c41c73abd77e7449c3016709c71b625da8c5f

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 provenancemm.nh.gov