MalwareProfessional ServicesProfessional ServicesRansomwareData EncryptedRansom DemandedFinancial accountIdentity (basic)Government IDMinorMediumContained

McCarthy & Holthus

bd_b9c58c1fde07b995 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 7, 2023

Filed

Jan 16, 2024

To disclose

14 weeks

Affected

700state residents only

Linked

3 filings

Confidence

69%

Full breach record for McCarthy & Holthus →

McCarthy & Holthus LLP reported a ransomware incident affecting 700 Washington residents. Unauthorized access occurred Oct 1-8, 2023; discovered Oct 7, 2023. Data included names, SSNs, loan numbers, and DOBs. Notices mailed starting Dec 6, 2023. Credit monitoring offered.

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Washington clock✗ WA AG >90d14 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 · 6 days

discovery → filing · 14 weeks / 101 days

Oct 1, 2023

Begins

Oct 7, 2023

Discovered

Jan 16, 2024

Filed

vs. sector median

4 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

California State AGbd_76fdc4bb44dd837b2024-01-16Verified
Oregon State AGbd_2b497665999faa9b2023-12-08 · +39dCandidate

Name: McCarthy & Holthus
norm: mccarthy holthus

Name: McCarthy & Holthus
norm: mccarthy holthus
Industry: Professional Servicesllm

Discovered: Oct 7, 2023
Breach occurred: Oct 1, 2023 – Oct 8, 2023
Undetected for: 6 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 6, 2023
Affected individuals: 700state-resident count only
Data types: Identity (basic)Government IDMinor
Data elements: NameSocial Security numberFinancial account numberDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Providing written notice of this incident to relevant state and federal regulators
Initial access: valid_credentials

During the incident: Launched an investigation with the assistance of third-party computer forensics specialists
Notified federal law enforcement
Providing individuals whose personal information was potentially affected by this incident with access to credit monitoring services for twenty-four (24) months through TransUnion at no cost to the individuals
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant state and federal regulators
Changes made: Taking steps to implement additional safeguards related to data privacy and security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(101 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 · 3 filings · 3 states

View merged incident ↗

Oregon State AGDec 8 · first

California State AG+39d

Washington State AG+39d · this page

Pattern: first filing Dec 8 (OR), last Jan 16 (WA) — a 39-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/BreachA27614.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 16, 2024
Raw hash: 29242988aaa08aea8ef5e94891c9f151e1085eec2588941d14b8ace59f5b7167

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMcCarthy & Holthus

Victim entityMcCarthy & Holthus

Incidentdiscovered Oct 7, 2023

Stated responseLaunched an investigation with the assistance of third-party computer forensics specialists

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com