HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedCustomer Data InvolvedGovernment IDFinancial accountMediumContained

ATLAS CPAs & Advisors

bd_42b033b91464cdce · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 10, 2024

Filed

Mar 24, 2025

To disclose

15 weeks

Affected

3state residents only

Linked

5 filings

Confidence

66%

Full breach record for ATLAS CPAs & Advisors →2 incidents on file

ATLAS CPAs & Advisors PLLC notified Montana residents of a December 2024 security incident where unauthorized access led to the exfiltration of Social Security numbers and financial data. The firm engaged forensic experts, notified law enforcement and the IRS, and provided credit monitoring services.

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Incident timeline

discovery → filing · 15 weeks / 104 days

Dec 10, 2024

Discovered

Mar 24, 2025

Filed

vs. sector median

2 wks faster

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

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitesilentransomgroupbd_3a07fc9a4cbd4afd2025-01-14 · +68dVerified by operator

Regulatory filings (3) · sorted by filing gap

Nebraska State AGbd_73c65a2cac7418ef2025-03-24Verified
Maine State AGbd_90362de4a47fda112025-03-25 · +1dVerified by operator
Massachusetts State AGbd_b87d2fbdbca545632025-03-25 · +1dVerified by operator

Name: ATLAS CPAs & Advisors
norm: atlas cpas advisors
Domain: atlascpas.com
Industry: professional_services

Name: ATLAS CPAs & Advisors
norm: atlas cpas advisors
Domain: atlascpas.com
Industry: professional_services
Industry: Professional Servicesllm

Discovered: Dec 10, 2024
Materiality determined: —
Notification sent: Mar 20, 2025
Affected individuals: 3state-resident count only
Data types: Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified IRSConsulted with law enforcement
Initial access: valid_credentials

During the incident: Engaged trusted third-party forensics and cybersecurity experts
Consulted with law enforcement
Notified applicable authorities and the IRS
Implemented additional administrative and technical safeguards
Provided complimentary credit monitoring and identity theft prevention services through Experian
Changes made: Implemented additional administrative and technical safeguards
Continuing to review and improve its administrative, technical, and physical safeguards
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(104 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 ↗

Nebraska State AGMar 24 · first

Montana State AGMar 24 · first · this page

Maine State AG+1d

Massachusetts State AG+1d

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/2025/04/Consumer-notification-letter-26.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 24, 2025
Raw hash: a21989b31f91d94c9e2bc1a3766bf2839392627e24c5f27df605ad4ea9068781

Linked disclosures

Ransomware claims (1)

Regulatory filings (3) · sorted by filing gap

Reporting entityATLAS CPAs & Advisors

Victim entityATLAS CPAs & Advisors

Incidentdiscovered Dec 10, 2024

Stated responseEngaged trusted third-party forensics and cybersecurity experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov