MalwareHealthcareHealthcareRansomwareData EncryptedData ExfiltratedCustomer Data InvolvedPHIIdentity (basic)Government IDFinancial accountHealth (basic)MediumContained

Northern California Medical Associates, Inc.

bd_599039c6dce5ad88 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 3, 2021

Filed

May 3, 2021

To disclose

9 weeks

Affected

Not disclosed

Confidence

65%

Full breach record for Northern California Medical Associates, Inc. →

Northern California Medical Associates, Inc. (NCMA) experienced a ransomware incident where unauthorized access began on February 19, 2021, and resulted in encryption of servers and workstations on March 3, 2021. NCMA detected unusual activity on March 3, 2021, and confirmed data exfiltration on March 29, 2021. Affected data includes PHI, PII (SSN, driver's license), financial account info, and medical records. NCMA shut down network portions, reset passwords, engaged forensics, restored data, and notified law enforcement.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 12 days

discovery → filing · 9 weeks / 61 days

Feb 19, 2021

Begins

Mar 3, 2021

Discovered

May 3, 2021

Filed

vs. sector median

4 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: Northern California Medical Associates, Inc.
norm: northern california medical associates

Name: Northern California Medical Associates, Inc.
norm: northern california medical associates
Industry: Healthcarellm

Discovered: Mar 3, 2021
Breach occurred: Feb 19, 2021 – Mar 3, 2021
Undetected for: 12 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)Government IDFinancial accountHealth (basic)
Data elements: Medical information
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notifying regulators where necessary

During the incident: Shut down portions of our network
Reset passwords
Commenced an investigation
Working with computer forensic specialists
Restored the encrypted data
Deployed additional monitoring tools on our network
Notified law enforcement
Notifying regulators where necessary
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(61 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/sb24-540500
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 3, 2021
Raw hash: a3ba2784991ad9f44d36c494fec2cca97d5d0719bf84b494e3f6d0ca1a791b56

Reporting entityNorthern California Medical Associates, Inc.

Victim entityNorthern California Medical Associates, Inc.

Incidentdiscovered Mar 3, 2021

Stated responseShut down portions of our network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov