MalwareProfessional ServicesProfessional ServicesRansomwareRansom DemandedData EncryptedIdentity (basic)Government IDFinancial accountPIIMediumContained

Stephen P. McCarthy, CPA

bd_10f67bf384ddc1ad · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 8, 2024

Filed

Oct 18, 2024

To disclose

23 weeks

Affected

1state residents only

Linked

2 filings

Confidence

63%

Full breach record for Stephen P. McCarthy, CPA →

Stephen P. McCarthy, CPA notified Montana residents of a ransomware attack on May 8, 2024. The incident disrupted network access. Potential data exposure includes names, SSNs, DOBs, and financial account details. No evidence of misuse was found. The firm engaged the FBI and Secret Service, implemented security measures, and offered 24 months of credit monitoring.

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Incident timeline

discovery → filing · 23 weeks / 163 days

May 8, 2024

Begins

May 8, 2024

Discovered

Oct 18, 2024

Filed

vs. sector median

+6 wks slower

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_f210ed56cdb7f71b2024-10-18Verified

Name: Stephen P. McCarthy, CPA
norm: stephen p mccarthy cpa

Name: Stephen P. McCarthy, CPA
norm: stephen p mccarthy cpa
Industry: Professional Servicesllm

Discovered: May 8, 2024
Breach occurred: May 8, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 8, 2024
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDFinancial accountPII
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: Notified the FBINotified the Secret Service

During the incident: Implemented additional security measures to further protect our network
Working with the appropriate agencies on your behalf
Notified the FBI and Secret Service
Providing access to Triple Bureau Credit Monitoring services at no charge for 24 months
Providing proactive fraud assistance through Cyberscout
Changes made: Implemented additional security measures to further protect our network and reduce the risk of a similar incident occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 23 weeks(163 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGOct 18 · first

Montana State AGOct 18 · 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-1771.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 18, 2024
Raw hash: 434bc00135c2a2290670599e7da57f5f1da6f14f2aaa4b9e1c06d3a85d1da85e

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityStephen P. McCarthy, CPA

Victim entityStephen P. McCarthy, CPA

Incidentdiscovered May 8, 2024

Stated responseImplemented additional security measures to further protect our network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov