HackingTechnologyHealthcareInformationVulnerability ExploitData ExfiltratedSupply Chain (3P Vendor)Identity (basic)Health (basic)MediumContained

Westat, Inc.

bd_2e1ea343e7bb4ee7 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 30, 2023

Filed

Oct 16, 2023

To disclose

20 weeks

Affected

10,282state residents only

Linked

11 records

Confidence

65%

Full breach record for Westat, Inc. →2 incidents on file

Westat, Inc. notified South Carolina residents of a data incident involving the MOVEit Transfer tool. Unauthorized access occurred May 28-29, 2023, resulting in the exfiltration of personal information including names and health-related data elements from DAWN surveillance files. Westat engaged forensic specialists, applied security patches, and offered 12 months of credit monitoring. No evidence of identity theft was found.

J jump to incidentP pin to compareR raw source

Leak gap clock⏱ Leak >90d20 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 2 days

discovery → filing · 20 weeks / 139 days

May 28, 2023

Begins

May 30, 2023

Discovered

Oct 16, 2023

Filed

vs. sector median

+9 wks slower

This filing is one of 11 records about the same incident.View merged incident

A leak claim by cl0p about this victim was first seen 98 days before this filing.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitecl0pbd_752092ce6faa5dd32023-07-10 · +98dVerified by operator

Regulatory filings (9) · sorted by filing gap

Indiana State AGbd_4027da82b6e67c622023-10-13 · +3dVerified
HHS OCRbd_5b63e0b82f445a712023-10-13 · +3dVerified
HHS OCRbd_0a5c6e5ef62bfc8d2023-11-03 · +18dCandidate
Vermont State AGbd_03476d52a3c7f6702023-07-21 · +87dVerified

Show 5 more filings ↓up to 87d gap

New Hampshire State AGbd_241c67cca32741002023-07-21 · +87dVerified by operator
Montana State AGbd_8839ed78d84140492023-07-21 · +87dCandidate
Indiana State AGbd_991dc2d92271be1c2023-07-21 · +87dVerified by operator
Maine State AGbd_be6506ff947b42aa2023-07-21 · +87dCandidate
Massachusetts State AGbd_f7f9fd512c2dec0d2023-07-21 · +87dVerified by operator

Name: Westat, Inc.
norm: westat
Domain: westat.com

Name: Westat, Inc.
norm: westat
Domain: westat.com
Industry: TechnologyllmHealthcarellm

Discovered: May 30, 2023
Breach occurred: May 28, 2023 – May 29, 2023
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 3, 2023
Affected individuals: 10,282state-resident count only
Data types: Identity (basic)Health (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

During the incident: Engaged with a third-party forensic specialist to assist in conducting a comprehensive investigation
Implemented all software security patches provided by MOVEit to date
Offering 12 months of credit monitoring and identity restoration services through IDX
Changes made: Implemented all software security patches provided by MOVEit to date
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 20 weeks(139 days from discovery to filing)
Compliance flags: Leak >90dSC CRA notice due
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 8 states

View merged incident ↗

Vermont State AGJul 21 · first

New Hampshire State AGJul 21 · first

Montana State AGJul 21 · first

Indiana State AGJul 21 · first

Maine State AGJul 21 · first

Massachusetts State AGJul 21 · first

Indiana State AG+84d

HHS OCR+84d

South Carolina State AG+87d · this page

HHS OCR+105d

Pattern: first filing Jul 21 (VT), last Nov 3 (MD) — a 105-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://consumer.sc.gov/sites/consumer/files/Documents/Security%20Breach%20Notices/WestatInc110323.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 16, 2023
Raw hash: 4dd05bb90fd00d5d371d945581c021ca2622965683b84b451e0781267f6e9ca9

Linked disclosures

Ransomware claims (1)

Regulatory filings (9) · sorted by filing gap

Reporting entityWestat, Inc.

Victim entityWestat, Inc.

Incidentdiscovered May 30, 2023

Stated responseEngaged with a third-party forensic specialist to assist in conducting a comprehensive investigation

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenanceconsumer.sc.gov