MalwareProfessional ServicesProfessional ServicesRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)LowContained

CHIPOTLE MEXICAN GRILL, INC.

bd_b87d7d2f605171e3 · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 5, 2023

Filed

May 24, 2024

To disclose

42 weeks

Affected

678state residents only

Linked

2 filings

Confidence

71%

Full breach record for CHIPOTLE MEXICAN GRILL, INC. →6 incidents on file

Messner Reeves LLP, on behalf of client Chipotle Mexican Grill, Inc., reported a ransomware incident. An unknown actor accessed systems between July 17 and August 5, 2023, copying files containing names and dates of birth. 678 Washington residents were notified on May 24, 2024. Messner Reeves engaged forensic investigators, notified law enforcement, and provided one year of credit monitoring.

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Washington clock✗ WA AG >90d42 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 · 19 days

discovery → filing · 42 weeks / 293 days

Jul 17, 2023

Begins

Aug 5, 2023

Discovered

May 24, 2024

Filed

vs. sector median

+23 wks slower

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Indiana State AGbd_39e16cd57a08a3802024-05-24Verified

Name: Messner Reeves LLP
norm: messner reeves
Domain: messner.com

Name: CHIPOTLE MEXICAN GRILL, INC.
norm: chipotle mexican grill
Industry: Professional Servicesllm

Discovered: Aug 5, 2023
Breach occurred: Jul 17, 2023 – Aug 5, 2023
Undetected for: 19 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 24, 2024
Affected individuals: 678state-resident count only
Data types: Identity (basic)
Data elements: NameDate of birth
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 ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notified federal law enforcement regarding the eventproviding written notice of this incident to relevant state and federal regulators, as necessary, and to the three major credit reporting agencies, Equifax, Experian, and TransUnion

During the incident: Investigated and responded to the incident
Assessed the security of Messner Reeves systems
Identified potentially affected individuals
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for one (1) year, through IDX, to individuals whose personal information was potentially affected by this incident, at no cost to these individuals
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this incident to relevant state and federal regulators, as necessary, and to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Implementing additional safeguards and training to its employees
Continue to review our existing policies and procedures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 42 weeks(293 days from discovery to filing)
Compliance flags: WA 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 · 2 filings · 2 states

View merged incident ↗

Indiana State AGMay 24 · first

Washington State AGMay 24 · 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/BreachA29246.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 24, 2024
Raw hash: d63531557bfcadddfa8a1db8956459614f12857da6af4b7008f60f6797b1b257

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMessner Reeves LLP

Victim entityCHIPOTLE MEXICAN GRILL, INC.

Incidentdiscovered Aug 5, 2023

Stated responseInvestigated and responded to the incident

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com