HackingHealthcareTechnologyHealthcareStolen CredentialsCapture Stored DataData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Health (basic)PHIMediumContained

REGENERON PHARMACEUTICALS, INC.

bd_2b4ab18fae66401b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Feb 21, 2024

Filed

May 22, 2024

To disclose

13 weeks

Affected

13,958state residents only

Linked

3 filings

Confidence

68%

Full breach record for REGENERON PHARMACEUTICALS, INC. →2 incidents on file

Regeneron Pharmaceuticals, Inc. experienced a data breach via its third-party vendor, The Lash Group, LLC. Unauthorized access occurred on Feb 21, 2024, involving exfiltration of PII and PHI (names, DOB, addresses, health diagnoses, prescriptions) from ~13,958 individuals. Lash Group detected the breach on Feb 21, 2024, and Regeneron was notified on April 18, 2024. Notifications were sent in May 2024.

J jump to incidentP pin to compareR raw source

Washington clock⏱ WA AG >30d13 weeks discovery → filing

Incident timeline

discovery → filing · 13 weeks / 91 days

Feb 21, 2024

Discovered

May 22, 2024

Filed

vs. sector median

+2 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_d92873937e60898f2024-05-22Verified
Montana State AGbd_efc24d0a7cba3aff2024-05-22Verified

Name: The Lash Group, LLC
norm: lash group

Name: REGENERON PHARMACEUTICALS, INC.
norm: regeneron pharmaceuticals
Industry: HealthcarellmTechnologyllm

Discovered: Feb 21, 2024
Materiality determined: —
Notification sent: May 2, 2024
Affected individuals: 13,958state-resident count only
Data types: Identity (basic)Health (basic)PHI
Data elements: NameDate of birthMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 0d
WA-stated discovery: Found after the fact
Attack vector: Unknown
MITRE ATT&CK: T1041 Exfiltration Over C2 ChannelT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Attorney General
Initial access: valid_credentials

During the incident: Engaged third-party cyber experts to conduct an investigation
Launched an investigation with the assistance of cybersecurity experts, law enforcement, and outside lawyers
Taken steps to strengthen the security of its systems
Sent notifications by mail to affected individuals
Offered two years of credit monitoring through Experian IdentityWorks
Changes made: Strengthened the security of its systems
Working with cybersecurity experts to reinforce systems and information security protocols
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 weeks(91 days from discovery to filing)
Compliance flags: WA AG >30d
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.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Indiana State AGMay 22 · first

Montana State AGMay 22 · first

Washington State AGMay 22 · 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/BreachA29228.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 22, 2024
Raw hash: 60dcfaaca7b4d8c7f0c1bfa2da02b374a9777ce35f4b06a045f5c6e2ef5bec9f

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityThe Lash Group, LLC

Victim entityREGENERON PHARMACEUTICALS, INC.

Incidentdiscovered Feb 21, 2024

Stated responseEngaged third-party cyber experts to conduct an investigation

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com