MalwareHealthcareHealthcareRansomwareData ExfiltratedRansom DemandedCustomer Data InvolvedIdentity (basic)Government IDPHIHealth (basic)CriticalContained

Western Washington Medical Group

bd_b8a7159ff331f4e5 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Sep 25, 2023

Filed

Nov 8, 2023

To disclose

6 weeks

Affected

334,360state residents only

Linked

5 filings

Confidence

70%

Full breach record for Western Washington Medical Group →2 incidents on file

Western Washington Medical Group reported a ransomware cyberattack occurring between July 7 and August 26, 2023, discovered on September 25, 2023. The incident potentially exposed patient PII (names, SSNs, DOBs) and PHI (medical records, diagnoses) for 334,360 individuals. The company engaged forensic investigators, secured the network, and offered credit monitoring.

J jump to incidentP pin to compareR raw source

Washington clock⏱ WA AG >30d6 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 · 80 days

discovery → filing · 6 weeks / 44 days

Jul 7, 2023

Begins

Sep 25, 2023

Discovered

Nov 8, 2023

Filed

vs. sector median

3 wks faster

This filing is one of 5 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Montana State AGbd_3194136d48dfc6e62023-11-08Verified
Massachusetts State AGbd_7f62435f119dd5842023-11-08Verified
California State AGbd_c7f523f67fade61f2023-11-08Verified
HHS OCRbd_ff8ede5de29714b02023-10-26 · +13dVerified

Name: Western Washington Medical Group
norm: western washington medical

Name: Western Washington Medical Group
norm: western washington medical
Industry: Healthcarellm

Discovered: Sep 25, 2023
Breach occurred: Jul 7, 2023 – Aug 26, 2023
Undetected for: 80 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 334,360state-resident count only
Data types: Identity (basic)Government IDPHIHealth (basic)
Data elements: NameSocial Security numberDate of birthHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found after the fact
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1119 Automated Collection
Threat actor: ExternalFinancial

During the incident: Shut off all access to the network
Engaged a specialized third-party forensic incident response firm to assist with securing the network environment and investigating the extent of unauthorized activity
Offering a complimentary access to Experian IdentityWorks
Changes made: Made immediate enhancements to our systems, security and practices
Engaged appropriate experts to assist us in conducting a full review of our security practices and systems to ensure that enhanced security protocols are in place going forward
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(44 days from discovery to filing)
Compliance flags: WA AG >30d
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 ↗

HHS OCROct 26 · first

Montana State AG+13d

Massachusetts State AG+13d

California State AG+13d

Washington State AG+13d · this page

Pattern: first filing Oct 26 (MS), last Nov 8 (WA) — a 13-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/BreachA26960.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 8, 2023
Raw hash: 8500c61b330c4acd031e5ab0f7351503ba24fcbceb6ac415fafcaf9d763758aa

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityWestern Washington Medical Group

Victim entityWestern Washington Medical Group

Incidentdiscovered Sep 25, 2023

Stated responseShut off all access to the network

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com