MalwareEducationEducationRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedEmployee Data InvolvedEducationFinancial accountHealth (basic)Identity (basic)Government IDPHIHighContained

Antioch University

bd_0d2f355cbd006364 · schema v1 · pii pii-v1

Severity

High

Discovered

Aug 11, 2023

Filed

Jul 10, 2024

To disclose

48 weeks

Affected

4,276state residents only

Linked

6 filings

Confidence

71%

Full breach record for Antioch University →2 incidents on file

Antioch University reported a ransomware attack affecting 4,276 Washington residents. The incident occurred between August 8-11, 2023, and was discovered on August 11, 2023. Affected data included names, SSNs, DOBs, driver's licenses, passport numbers, financial account numbers, and health information. Notifications were sent on July 10, 2024.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d48 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 · 3 days

discovery → filing · 48 weeks / 334 days

Aug 8, 2023

Begins

Aug 11, 2023

Discovered

Jul 10, 2024

Filed

vs. sector median

+38 wks slower

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Maine State AGbd_11e78d1f41e58ba32024-07-10Verified
Vermont State AGbd_5bac71a2b97f19c12024-07-10Verified
Indiana State AGbd_93b5291efc880dd02024-07-10Verified
Montana State AGbd_9a7047aeffedf6ef2024-07-10Verified

Show 1 more filing ↓

New Hampshire State AGbd_ba0e465e4d7cbb842024-07-10Verified

Name: Wilson Elser Moskowitz Edelman and Dicker LLP
norm: wilson elser Moskowitz Edelman and Dicker
Domain: antioch.edu

Name: Antioch University
norm: antioch university
Domain: antioch.edu
Also named: Coalition for the Common Gooddba oflegal entity
Antioch Universitydba oftrade name
Industry: Educationllm

Discovered: Aug 11, 2023
Breach occurred: Aug 8, 2023 – Aug 11, 2023
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 10, 2024
Affected individuals: 4,276state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)
Data elements: NameSocial Security numberDriver's licence numberFinancial account numberDate of birthStudent ID numberPassport numberMedical information
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Office of the Attorney General

During the incident: Disconnected all access to the network
Engaged legal counsel and specialized cybersecurity professionals to conduct a forensic investigation
Securely restore its network from backups
Changed administrative credentials
Installed a new firewall
Upgraded its intrusion detection software
Engaged a cybersecurity firm to monitor its network activity
Mailed personalized notification letters
Offered complimentary credit monitoring and identity theft protection services
Changes made: Installed a new firewall
Upgraded its intrusion detection software
Engaged a cybersecurity firm to monitor its network activity
Changed administrative credentials
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 48 weeks(334 days from discovery to filing)
Compliance flags: Leak >180dWA 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 · 6 filings · 6 states

View merged incident ↗

Maine State AGJul 10 · first

Vermont State AGJul 10 · first

Indiana State AGJul 10 · first

Montana State AGJul 10 · first

New Hampshire State AGJul 10 · first

Washington State AGJul 10 · 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/BreachA29794.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 10, 2024
Raw hash: 8b1565b05ef1f14607b74869235ac3e7e17d86f45cfdd1b45d93e48015dcbb70

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityWilson Elser Moskowitz Edelman and Dicker LLP

Victim entityAntioch University

Incidentdiscovered Aug 11, 2023

Stated responseDisconnected all access to the network

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com