HackingProfessional ServicesProfessional ServicesStolen CredentialsData ExfiltratedTargetedPIIIdentity (basic)LowContained

Abbey Tax. LLC

bd_6aa6cc5b2aa03769 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 5, 2022

Filed

Mar 23, 2023

To disclose

24 weeks

Affected

18state residents only

Linked

2 filings

Confidence

65%

Full breach record for Abbey Tax. LLC →

Abbey Tax, LLC notified Montana residents of a data security incident where its EFIN was used to file fraudulent 2021 tax returns. Discovered Oct 5, 2022, malware was found on a corporate device. No client data access confirmed, but PII was potentially exposed. Credit monitoring offered.

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Incident timeline

undetected · 277 days

discovery → filing · 24 weeks / 169 days

Jan 1, 2022

Begins

Oct 5, 2022

Discovered

Mar 23, 2023

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

Maine State AGbd_de50dd3d970477fa2023-03-23Verified

Name: Abbey Tax. LLC
norm: abbey tax

Name: Abbey Tax. LLC
norm: abbey tax
Industry: Professional Servicesllm

Discovered: Oct 5, 2022
Breach occurred: Jan 1, 2022 – Dec 31, 2022
Undetected for: 277 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 23, 2023
Affected individuals: 18state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Coordinated with the IRS
Initial access: valid_credentials

During the incident: Coordinated with the IRS to provide them with more information
Obtained a new EFIN number
Provided specific information to the IRS in order to protect Abbey Tax clients from potential fraudulent returns
Commenced a prompt and thorough investigation into our information systems
Working very closely with external cybersecurity professionals experienced in handling these types of incidents to analyze the extent of any compromise of the information on our network
Changed all of its [credentials/access]
Changes made: Continually evaluate and modify its practices and internal controls to enhance the security and privacy of its personal information
Providing access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing proactive fraud assistance to help with any questions that you might have or in event that you become a victim of fraud
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 24 weeks(169 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 ↗

Maine State AGMar 23 · first

Montana State AGMar 23 · 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-130.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 23, 2023
Raw hash: 73b71ca1fcd4736b685cf058b875080ce4776b6c176692a0140dada0d64f92b5

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityAbbey Tax. LLC

Victim entityAbbey Tax. LLC

Incidentdiscovered Oct 5, 2022

Stated responseCoordinated with the IRS to provide them with more information

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov