Social EngineeringHealthcareHealthcarePhishingStolen CredentialsCustomer Data InvolvedEmployee Data InvolvedData ExfiltratedIdentity (basic)Government IDFinancial accountHealth (basic)PHICredentialsHighContained

Jefferson Healthcare

bd_678cccb46681fc86 · schema v1 · pii pii-v1

Severity

High

Discovered

Nov 12, 2020

Filed

Jan 11, 2021

To disclose

9 weeks

Affected · nationwide

2,5432,496 in this filing

Linked

2 filings

Confidence

70%

Full breach record for Jefferson Healthcare →

Jefferson Healthcare, a public hospital district in Washington, disclosed a phishing incident where an employee's email credentials were compromised. Unauthorized access occurred from Nov 9-12, 2020. Data exposed included PHI, SSNs, names, DOBs, and financial info for ~2,543 individuals (2,496 WA residents). Notifications were sent Jan 11, 2021, offering credit monitoring.

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Washington clock⏱ WA AG >30d9 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 · 3 days

discovery → filing · 9 weeks / 60 days

Nov 9, 2020

Begins

Nov 12, 2020

Discovered

Jan 11, 2021

Filed

vs. sector median

4 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_c9796f25cf31fc432021-01-11Candidate

Name: Jefferson Healthcare
norm: jefferson healthcare
Domain: jeffersonhealthcare.org
Industry: Health

Name: Jefferson Healthcare
norm: jefferson healthcare
Domain: jeffersonhealthcare.org
Industry: Health
Industry: Healthcarellm

Discovered: Nov 12, 2020
Breach occurred: Nov 9, 2020 – Nov 12, 2020
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 11, 2021
Affected individuals: 2,543state + nationwide
Data types: Identity (basic)Government IDFinancial accountHealth (basic)PHICredentials
Data elements: NameSocial Security numberDriver's licence numberDate of birthHealth 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: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Regulator citations: Provided notice to the U.S. Secretary of Health and Human Services
Initial access: phishing_link

During the incident: Temporarily suspending access to all systems for the affected employee
Removing the affected computer from the network
Engaging a forensics team to scrub the PC
Requiring all employees to immediately change their email login passwords
Requiring multi-factor authentication to log in when outside of the Jefferson Healthcare network
Increasing cybersecurity training requirements for all employees
Increasing the number of sanctioned phishing attempts
Provided written notification of the data security incident to all affected individuals
Offered no-cost access to credit monitoring services
Issued a press release about the incident to prominent print media outlets
Posted a notice about the incident on its website
Provided notice to the U.S. Secretary of Health and Human Services
Changes made: Implementing additional technology safeguards
Conducting additional training for staff members on preventing phishing attacks and securing login credentials
Reviewing policies and procedures to ensure they sufficiently protect against further incidents
Planned implementation of identity management and Single Sign-On
Enhanced analytics to identify potential issues before they occur
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 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 · 2 filings

View merged incident ↗

HHS OCRJan 11 · first

Washington State AGJan 11 · first · this page

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/BreachM10387.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 11, 2021
Raw hash: 3f91c41957fedcccbbeeedaf6a6a3b1e44d98a318310cfa66aa3851cda2deaf9

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityJefferson Healthcare

Victim entityJefferson Healthcare

Incidentdiscovered Nov 12, 2020

Stated responseTemporarily suspending access to all systems for the affected employee

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com