HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDFinancial accountMediumContained

H&R Block

bd_981c4914b3bfe8e1 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 9, 2024

Filed

Dec 19, 2024

To disclose

19 weeks

Affected

889state residents only

Linked

5 filings

Confidence

69%

H&R Block notified Washington AG of unauthorized access to client accounts between May 13 and August 7, 2024. The attacker used stolen PII to gain access. Data exposed included names, SSNs, tax info, and financial accounts. 889 Washington residents affected. Incident discovered August 9, 2024; notifications sent November 26, 2024.

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Washington clock✗ WA AG >90d19 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 88 days

discovery → filing · 19 weeks / 132 days

May 13, 2024

Begins

Aug 9, 2024

Discovered

Dec 19, 2024

Filed

vs. sector median

+11 wks slower

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

Maine State AGbd_c0bc38fd204f3db02024-12-19Verified
Massachusetts State AGbd_151afb34a6a389282024-12-27 · +8dVerified
California State AGbd_1d95c96ac571a1432024-12-27 · +8dVerified
Montana State AGbd_5b24df076e62252a2024-10-03 · +77dCandidate

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

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

Discovered: Aug 9, 2024
Breach occurred: May 13, 2024 – Aug 7, 2024
Undetected for: 88 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 26, 2024
Affected individuals: 889state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: NameSocial Security numberDriver's licence numberFinancial account numberDate of birth
WA-stated cause: Unauthorized Access
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: valid_credentials

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

Time to disclose: 19 weeks(132 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Montana State AGOct 3 · first

Maine State AG+77d

Washington State AG+77d · this page

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA31750.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 19, 2024
Raw hash: cdde4a5568dbfc0c43c634ff6c5caaae37bb85f36a187954f236abc5078ffed3

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 us in determining the nature and scope of the incident

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com