HackingTechnologyHealthcareInformationVulnerability ExploitCapture Stored DataData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDHealth (basic)PHIHighContained

Cohere Health

bd_9690dc598754ddee · schema v1 · pii pii-v1

Severity

High

Discovered

Jul 26, 2023

Filed

Dec 15, 2023

To disclose

18 weeks

Affected · nationwide

48,2572,299 in this filing

Linked

2 filings

Confidence

69%

Full breach record for Cohere Health →3 incidents on file

Welltok, Inc. issued a supplemental notice to the Washington AG regarding a MOVEit Transfer server compromise. An unknown actor exploited vulnerabilities to access the server on May 30, 2023, and exfiltrated PHI and PII. Welltok detected the issue on July 26, 2023, and confirmed the breach on August 11, 2023. Notices were sent to affected individuals starting December 13, 2023.

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Washington clock✗ WA AG >90d18 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 · 57 days

discovery → filing · 20 weeks / 142 days

May 30, 2023

Begins

Jul 26, 2023

Discovered

Dec 15, 2023

Filed

vs. sector median

1 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

Delaware State AGbd_d2536a540e50248e2023-12-14 · +1dCandidate

Name: Welltok, Inc.
norm: welltok

Name: Cohere Health
norm: cohere health
Industry: TechnologyllmHealthcarellm

Discovered: Jul 26, 2023
Breach occurred: May 30, 2023
Undetected for: 57 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 13, 2023
Affected individuals: 48,257state + nationwide
Data types: Identity (basic)Government IDHealth (basic)PHI
Data elements: NameDate of birthHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle Unknowndexposure Unknownd
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

During the incident: Launched an additional investigation with the assistance of third-party cybersecurity specialists
Conducted an examination of its systems and networks
Providing access to credit monitoring services for twelve (12) to twenty-four (24) months through Experian
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Changes made: Reviewing and enhancing its existing policies and procedures related to data privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(126 days from discovery to filing)
Compliance flags: WA AG >90d
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 ↗

Delaware State AGDec 14 · first

Washington State AG+1d · 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/BreachM16499.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 15, 2023
Raw hash: 596ce1a767910d65690b71a0faff06379e792d9fd5422514ef3aefe1de542d37

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityWelltok, Inc.

Victim entityCohere Health

Incidentdiscovered Jul 26, 2023

Stated responseLaunched an additional investigation with the assistance of third-party cybersecurity specialists

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com