HackingFinancial ServicesProfessional ServicesFinanceStolen CredentialsTargetedIdentity (basic)Government IDFinancial accountPIIMediumContained

H&R Block

bd_5b24df076e62252a · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 9, 2024

Filed

Oct 3, 2024

To disclose

8 weeks

Affected

19state residents only

Linked

5 filings

Confidence

65%

H&R Block notified Montana residents on September 24, 2024, of a data incident occurring August 5-7, 2024. An unauthorized third party used stolen PII from external sources to access client accounts. Affected data included names, SSNs/ITINs, and financial info. H&R Block engaged forensic experts, terminated access, and offered 24 months of identity protection services.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 4 days

discovery → filing · 8 weeks / 55 days

Aug 5, 2024

Begins

Aug 9, 2024

Discovered

Oct 3, 2024

Filed

vs. sector median

on median

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

Washington State AGbd_981c4914b3bfe8e12024-12-19 · +77dVerified
Maine State AGbd_c0bc38fd204f3db02024-12-19 · +77dVerified
Massachusetts State AGbd_151afb34a6a389282024-12-27 · +85dVerified
California State AGbd_1d95c96ac571a1432024-12-27 · +85dVerified

Name: HRB Tax Group, Inc.
norm: hrb tax

Name: H&R Block
norm: h&r block
Industry: Financial ServicesllmProfessional Servicesllm

Discovered: Aug 9, 2024
Breach occurred: Aug 5, 2024 – Aug 7, 2024
Undetected for: 4 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 24, 2024
Affected individuals: 19state-resident count only
Data types: Identity (basic)Government IDFinancial accountPII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Engaged third-party experts to assist in determining the nature and scope of the incident
Took measures to contain the incident and terminate the unauthorized access
Engaged a third-party cybersecurity firm to assist with the investigation
Offering identity theft protection services through IDX
Changes made: Took proactive measures designed to limit future unauthorized access
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(55 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 ↗

Montana State AGOct 3 · first · this page

Washington State AG+77d

Maine State AG+77d

Massachusetts State AG+85d

California State AG+85d

Pattern: first filing Oct 3 (MT), last Dec 27 (CA) — a 85-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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-1739.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 3, 2024
Raw hash: 4abd1c73e070a27d8ca604e89667410e92cd72e75a634299c86c0ca2d791232e

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityHRB Tax Group, Inc.

Victim entityH&R Block

Incidentdiscovered Aug 9, 2024

Stated responseEngaged third-party experts to assist in determining the nature and scope of the incident

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov