MalwareHealthcareHealthcareRansomwareData ExfiltratedData EncryptedRansom DemandedPHIHealth (basic)Identity (basic)Government IDMediumContained

Crozer-Keystone Health System (Delaware County, PA)

bd_b9f11fdc5991ca6b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 14, 2020

Filed

Sep 30, 2020

To disclose

15 weeks

Affected

9state residents only

Linked

3 filings

Confidence

66%

Full breach record for Crozer-Keystone Health System (Delaware County, PA) →

Crozer-Keystone Health System notified Montana residents of a ransomware incident discovered on June 14, 2020. The attack involved a known ransomware group that exfiltrated and then returned patient data, including names, SSNs, DOBs, and health information related to COVID-19 testing. The incident is contained; the organization enhanced security controls and offered one year of credit monitoring.

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Incident timeline

discovery → filing · 15 weeks / 108 days

Jun 14, 2020

Discovered

Sep 30, 2020

Filed

vs. sector median

+3 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siterevilbd_345d0588be0850f82020-06-01 · +121dCandidate

Regulatory filings (1) · sorted by filing gap

Delaware State AGbd_e3b090b7ca2e27de2020-09-01 · +29dVerified

Name: Crozer-Keystone Health System (Delaware County, PA)
norm: crozer keystone health system delaware county

Name: Crozer-Keystone Health System (Delaware County, PA)
norm: crozer keystone health system delaware county
Industry: Healthcarellm

Discovered: Jun 14, 2020
Materiality determined: —
Notification sent: Sep 1, 2020
Affected individuals: 9state-resident count only
Data types: PHIHealth (basic)Identity (basic)Government ID
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial

During the incident: Engaged external security professionals to assist in conducting a full investigation
Isolated the malware
Repaired systems and brought them back to full functionality
Ensured that any impacted data was returned
Enhanced security detection and response processes
Implemented additional safeguards to enhance access controls to systems
Offered free credit monitoring and identity recovery services for one year
Changes made: Enhanced security detection and response processes
Implemented additional safeguards to enhance access controls to systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(108 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Delaware State AGSep 1 · first

Montana State AG+29d · this page

Pattern: first filing Sep 1 (DE), last Sep 30 (MT) — a 29-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://dojmt.gov/wp-content/uploads/CrozerSamp.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 30, 2020
Raw hash: d50e46d01324dfdb5b73cd435e5072212bafa4f1a2fe06f2a148666dc3e95644

Linked disclosures

Ransomware claims (1)

Regulatory filings (1) · sorted by filing gap

Reporting entityCrozer-Keystone Health System (Delaware County, PA)

Victim entityCrozer-Keystone Health System (Delaware County, PA)

Incidentdiscovered Jun 14, 2020

Stated responseEngaged external security professionals to assist in conducting a full investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov