MalwareHealthcareHealthcareRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDHealth (basic)Financial accountCriticalContained

CommonSpirit Health

bd_60ecfa2b342ef2d8 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Oct 2, 2022

Filed

Dec 1, 2022

To disclose

9 weeks

Affected · nationwide

582,285317 in this filing

Linked

2 filings

Confidence

69%

Full breach record for CommonSpirit Health →3 incidents on file

CommonSpirit Health filed a supplemental notice with the Washington AG regarding a ransomware attack detected on October 2, 2022. Unauthorized access occurred between September 16 and October 3, 2022, affecting patient and employee data including SSNs and health info. 317 Washington residents were notified on April 6, 2023. Total affected individuals estimated at 582,285.

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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 · 16 days

discovery → filing · 9 weeks / 60 days

Sep 16, 2022

Begins

Oct 2, 2022

Discovered

Dec 1, 2022

Filed

vs. sector median

2 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_f24a982543deed622022-12-01Verified

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: CommonSpirit Health
norm: commonspirit health
Industry: Healthcarellm

Discovered: Oct 2, 2022
Breach occurred: Sep 16, 2022 – Oct 3, 2022
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 6, 2023
Affected individuals: 582,285state + nationwide
Data types: Identity (basic)Government IDHealth (basic)Financial account
Data elements: NameDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified federal law enforcementProviding written notice of this incident to relevant state and federal regulatorsProviding written notice to the three major credit reporting agenciesNotified the U.S. Department of Health and Human Services

During the incident: Took some systems offline
Began an investigation with the assistance of an external leading cybersecurity specialist
Undertook a comprehensive manual review of files
Notified federal law enforcement
Systems were returned to the network with additional security and monitoring tools
Providing access to credit monitoring services for one (1) year, through Kroll
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant state and federal regulators
Providing written notice to the three major credit reporting agencies
Notified the U.S. Department of Health and Human Services
Changes made: Implementing additional safeguards and training to its employees
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 · 2 states

View merged incident ↗

HHS OCRDec 1 · first

Washington State AGDec 1 · 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/BreachA16622.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 1, 2022
Raw hash: 4051615efb154cc17841d277a41e37650a46965d70c4c7b6554f1d4689b8ffa6

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityCommonSpirit Health

Incidentdiscovered Oct 2, 2022

Stated responseTook some systems offline

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com