HackingRetail & ConsumerRetailVulnerability ExploitData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)MediumContained

American Multi-Cinema, Inc

bd_558a19488c8436a0 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 1, 2023

Filed

Jul 13, 2023

To disclose

6 weeks

Affected

45state residents only

Linked

3 filings

Confidence

65%

Full breach record for American Multi-Cinema, Inc →3 incidents on file

AMC Theatres notified Montana residents of a data breach involving the MOVEit file-transfer application. Unauthorized access occurred May 28-June 1, 2023. Affected data included names, DOBs, SSNs, and medical information. AMC engaged forensic experts and offered one year of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 4 days

discovery → filing · 6 weeks / 42 days

May 28, 2023

Begins

Jun 1, 2023

Discovered

Jul 13, 2023

Filed

vs. sector median

2 wks faster

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_0fe0c6fd532af5c82023-07-13Verified
California State AGbd_8a184e59dafef69d2023-07-13Verified

Name: American Multi-Cinema, Inc
norm: american multi cinema

Name: American Multi-Cinema, Inc
norm: american multi cinema
Industry: Retail & Consumerllm

Discovered: Jun 1, 2023
Breach occurred: May 28, 2023 – Jun 1, 2023
Undetected for: 4 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 13, 2023
Affected individuals: 45state-resident count only
Data types: Identity (basic)Government IDHealth (basic)
Data elements: Social Security numberDate of birthMedical information
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: Hired third-party experts to address the situation
Investigated the unauthorized activity
Further secured AMC’s systems
Engaged a data-review firm to determine what information was in those files
Offered a complimentary one-year membership to Experian’s IdentityWorks
Changes made: Disconnected the affected network asset
Remediated the MOVEit vulnerability
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(42 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Indiana State AGJul 13 · first

California State AGJul 13 · first

Montana State AGJul 13 · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-421.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 13, 2023
Raw hash: c69fe62ae203ead1be5f5bf4afc37af0e59de00f7c031384ddf642e2378c7a9c

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityAmerican Multi-Cinema, Inc

Victim entityAmerican Multi-Cinema, Inc

Incidentdiscovered Jun 1, 2023

Stated responseHired third-party experts to address the situation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov