MalwareHealthcareHealthcareRansomwareData ExfiltratedData EncryptedTargetedPIIIdentity (basic)Health (basic)LowContained

CommonSpirit Health

bd_05d8658012852c75 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 2, 2022

Filed

Apr 6, 2023

To disclose

27 weeks

Affected

17state residents only

Linked

3 filings

Confidence

65%

Full breach record for CommonSpirit Health →3 incidents on file

CommonSpirit Health notified Montana residents of a ransomware attack detected on October 2, 2022. Unauthorized access occurred between September 16 and October 3, 2022. The attacker accessed file share servers containing patient information (names, addresses). SSNs and financial data were not compromised. CommonSpirit engaged forensic vendors, notified law enforcement, and enhanced security monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 16 days

discovery → filing · 27 weeks / 186 days

Sep 16, 2022

Begins

Oct 2, 2022

Discovered

Apr 6, 2023

Filed

vs. sector median

+16 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Indiana State AGbd_702133126061dd7b2023-04-06Verified
Massachusetts State AGbd_70df6ba39299c9582023-04-06Verified

Name: CommonSpirit Health
norm: commonspirit health

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: —
Affected individuals: 17state-resident count only
Data types: PIIIdentity (basic)Health (basic)
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified law enforcement

During the incident: Took some systems offline
Began an investigation with the assistance of an external forensics vendor
Notified law enforcement
Returned systems to the network with additional security and monitoring tools
Retained Kroll to manage a call center
Changes made: Implemented additional security and monitoring tools
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 27 weeks(186 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Indiana State AGApr 6 · first

Massachusetts State AGApr 6 · first

Montana State AGApr 6 · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-172.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 6, 2023
Raw hash: fdcb009e1a571b049ce3a31df99dc98b7c52f472e25ce2bd715e196f84fab966

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityCommonSpirit Health

Victim entityCommonSpirit Health

Incidentdiscovered Oct 2, 2022

Stated responseTook some systems offline

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov