HackingHealthcareTechnologyHealthcareVulnerability ExploitData ExfiltratedCustomer Data InvolvedDelayed DiscoveryHealth (basic)Identity (basic)PHIMediumContained

AETNA INC.

bd_76dd03d54af86806 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 26, 2023

Filed

Feb 28, 2024

To disclose

31 weeks

Affected

2,653state residents only

Confidence

68%

Full breach record for AETNA INC. →38 incidents on file

Welltok, Inc. reported a supplemental data event on behalf of Aetna ACE involving the MOVEit Transfer server. An unknown actor exploited software vulnerabilities to access the server on May 30, 2023, and exfiltrated data including names, diagnoses, and health insurance info. Welltok was alerted on July 26, 2023. Notices were sent to 2,653 Washington residents starting Feb 23, 2024.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d31 weeks discovery → filing

Incident timeline

undetected · 57 days

discovery → filing · 31 weeks / 217 days

May 30, 2023

Begins

Jul 26, 2023

Discovered

Feb 28, 2024

Filed

vs. sector median

+22 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed2,653 affectedView incident

Name: Welltok, Inc.
norm: welltok
Domain: aetna.com

Name: AETNA INC.
norm: aetna
Domain: aetna.com
Industry: HealthcarellmTechnologyllm

Discovered: Jul 26, 2023
Breach occurred: May 30, 2023
Undetected for: 57 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 23, 2024
Affected individuals: 2,653state-resident count only
Data types: Health (basic)Identity (basic)
Data elements: NameHealth insurance IDMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle Unknowndexposure Unknownd
WA-stated discovery: Found after the fact
Attack vector: Misconfiguration
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
Providing access to credit monitoring services for twelve (12) to twenty-four (24) months, depending on state law requirements, 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: 31 weeks(217 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM16516.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 28, 2024
Raw hash: fb95e8f4c40e5402ddf8d909ebca06fbfc580aec6dff78d9b667b18d5c660750

Reporting entityWelltok, Inc.

Victim entityAETNA INC.

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