MalwareGovernmentGovernmentRansomwareCapture Stored DataData ExfiltratedData EncryptedCustomer Data InvolvedTargetedAuthenticationFinancial accountHealth (basic)Identity (basic)Government IDPHIHighContained

Clark County, WA

bd_344dce71a7074253 · schema v1 · pii pii-v1

Severity

High

Discovered

Oct 21, 2023

Filed

Jun 2, 2025

To disclose

20 months

Affected

58,168state residents only

Confidence

69%

Full breach record for Clark County, WA →2 incidents on file

Clark County, WA, reported a ransomware incident detected on October 21, 2023, involving unauthorized access between October 16-21, 2023. Systems were encrypted, and data including names, SSNs, DOBs, financial accounts, and health info was accessed. 58,168 Washington residents were notified on May 29, 2025. The county engaged law enforcement and provided 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d20 months 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 · 5 days

discovery → filing · 20 months / 590 days

Oct 16, 2023

Begins

Oct 21, 2023

Discovered

Jun 2, 2025

Filed

vs. sector median

+73 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed58,168 affectedView incident

Name: Clark County, WA
norm: clark county wa
Industry: Government

Name: Clark County, WA
norm: clark county wa
Industry: Government
Industry: Governmentllm

Discovered: Oct 21, 2023
Breach occurred: Oct 16, 2023 – Oct 21, 2023
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 29, 2025
Affected individuals: 58,168state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)Authentication
Data elements: NameSocial Security numberDriver's licence numberFinancial account numberDate of birthPassport numberHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: providing written notice of this incident to relevant state regulators, as necessary

During the incident: Brought the network offline
Launched an investigation into the nature and scope of the event
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months, through IDX
Changes made: Implement additional safeguards and training to its employees
Reviewed our policies, procedures, security tools, and employee training programs to reduce the risk of a similar event occurring in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 20 months(590 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.

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/BreachA33488.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 2, 2025
Raw hash: 7a2aa75b26e06fdf493ac64bea2492b58f1107a821cd9a8d43d53f40266f18fb

Reporting entityClark County, WA

Victim entityClark County, WA

Incidentdiscovered Oct 21, 2023

Stated responseBrought the network offline

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com