HackingHealthcareHealthcareCustomer Data InvolvedEmployee Data InvolvedPHIGovernment IDIdentity (basic)Health (basic)MediumContained

Western Washington Medical Group

bd_c7f523f67fade61f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 26, 2023

Filed

Nov 8, 2023

To disclose

11 weeks

Affected

Not disclosed

Linked

5 filings

Confidence

65%

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

Western Washington Medical Group experienced a network security incident on August 26, 2023, involving unauthorized access to its network environment. The breach window is identified as July 7, 2023, to August 26, 2023. Affected data may include names, addresses, Social Security numbers, dates of birth, medical record numbers, health insurance policy numbers, and medical history. The organization contained the incident by shutting off network access and engaged third-party forensic investigators. Complimentary identity monitoring services were offered to affected individuals.

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Incident timeline

undetected · 50 days

discovery → filing · 11 weeks / 74 days

Jul 7, 2023

Begins

Aug 26, 2023

Discovered

Nov 8, 2023

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

Montana State AGbd_3194136d48dfc6e62023-11-08Verified
Massachusetts State AGbd_7f62435f119dd5842023-11-08Verified
Washington State AGbd_b8a7159ff331f4e52023-11-08Verified
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: Aug 26, 2023
Breach occurred: Jul 7, 2023 – Aug 26, 2023
Undetected for: 50 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PHIGovernment IDIdentity (basic)Health (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External

During the incident: Immediately 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
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
Offering a complimentary access to Experian IdentityWorks
Changes made: Made immediate enhancements to our systems, security and practices
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: 11 weeks(74 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 ↗

HHS OCROct 26 · first

Montana State AG+13d

Massachusetts State AG+13d

Washington State AG+13d

California State AG+13d · this page

Pattern: first filing Oct 26 (MS), last Nov 8 (CA) — 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://oag.ca.gov/ecrime/databreach/reports/sb24-576241
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: 0b9cd8119c5fd16e1cb8a78206ed16641dca9ecb581db5c1e140c2b0563609e7

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityWestern Washington Medical Group

Victim entityWestern Washington Medical Group

Incidentdiscovered Aug 26, 2023

Stated responseImmediately shut off all access to the network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov