Social EngineeringHealthcareHealthcarePhishingStolen CredentialsCustomer Data InvolvedMulti-Stage ChainPHIIdentity (basic)Health (basic)MediumContained

OVERLAKE MEDICAL CENTER & CLINICS

bd_275afc788816b9c6 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 9, 2019

Filed

Feb 7, 2020

To disclose

9 weeks

Affected

1,087state residents only

Linked

5 filings

Confidence

66%

Full breach record for OVERLAKE MEDICAL CENTER & CLINICS →2 incidents on file

Overlake Medical Center & Clinics experienced a phishing incident where attackers used deceptive emails to obtain employee login credentials. Unauthorized access to email accounts occurred between December 6-9, 2019, potentially exposing demographic, health insurance, and clinical information for 1,087 California residents. The organization secured accounts, engaged forensic investigators, and implemented MFA and enhanced security training.

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California clockDiscovered Dec 9, 2019 → Notified Feb 4, 202057d ✓ CA 60-day OK9 weeks discovery → filing

Incident timeline

undetected · 3 days

discovery → filing · 9 weeks / 60 days

Dec 6, 2019

Begins

Dec 9, 2019

Discovered

Feb 7, 2020

Filed

vs. sector median

4 wks faster

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

HHS OCRbd_10ffcc7ae52ef6772020-02-07Verified
Montana State AGbd_21978de6822b001b2020-02-07Verified
Oregon State AGbd_69c1780df1b141992020-02-07Verified
Illinois State AGbd_7b73dfeed69ec4372020-01-01 · +37dCandidate

Name: OVERLAKE MEDICAL CENTER & CLINICS
norm: overlake medical center clinics

Name: OVERLAKE MEDICAL CENTER & CLINICS
norm: overlake medical center clinics
Industry: Healthcarellm

Discovered: Dec 9, 2019
Breach occurred: Dec 6, 2019 – Dec 9, 2019
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 4, 2020
Affected individuals: 1,087state-resident count only
Data types: PHIIdentity (basic)Health (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Secured the accounts
Began an investigation
Engaged a cyber security firm to assist
Resetting passwords for all compromised employee accounts to prevent further unauthorized access
Established a dedicated call center where affected individuals may obtain more information regarding the incident
Changes made: Enhancing the already mandatory education for employees to help them better recognize and avoid phishing emails
Enhancing the technology in use to identify and block suspicious external emails
Implementing multi-factor authentication, which requires staff to go through multiple steps to verify their identity in order to access systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 days from discovery to filing)
Compliance flags: CA 60-day OK · 57d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: Dec 9, 2019
→ Notified: Feb 4, 2020
57d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Dec 9, 2019 → Notified: Feb 4, 2020	57d	60 days (analyst band, pre-2026 discoveries)	CA 60-day OK

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Illinois State AGJan 1 · first

HHS OCR+37d

Montana State AG+37d

Oregon State AG+37d

California State AG+37d · this page

Pattern: first filing Jan 1 (IL), last Feb 7 (CA) — a 37-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/sb24-187100
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 7, 2020
Raw hash: 80fcc836a4bc744e5b7d4f53c942eda508270ac1bb9542df255fddd803037c05

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityOVERLAKE MEDICAL CENTER & CLINICS

Victim entityOVERLAKE MEDICAL CENTER & CLINICS

Incidentdiscovered Dec 9, 2019

Stated responseSecured the accounts

ComplianceCA 60-day OK

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov