HackingRetail & ConsumerHospitalityRetailStolen CredentialsData ExfiltratedTargetedPCIFinancial accountIdentity (basic)LowContained

Grand Sierra Resort

bd_7cd434b55e71997e · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 29, 2015

Filed

Jun 6, 2016

To disclose

36 weeks

Affected

111state residents only

Linked

4 filings

Confidence

64%

Full breach record for Grand Sierra Resort →

Grand Sierra Resort notified Montana DOJ of a data breach affecting payment card information (names, card numbers, expiration, Track 1/2 data) from POS terminals at food and retail locations. Compromise window: Feb 2014–Mar 2014 and Mar 2015–Aug 2015. Discovered Sept 2015 via law enforcement. Forensic investigation confirmed compromise. No lodging payment cards affected. Count of affected individuals not disclosed.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 587 days

discovery → filing · 36 weeks / 251 days

Feb 19, 2014

Begins

Sep 29, 2015

Discovered

Jun 6, 2016

Filed

vs. sector median

+28 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Washington State AGbd_50d6ffaa95fd74fb2016-06-10 · +4dVerified
Massachusetts State AGbd_a2fead94c37f7a7c2016-06-13 · +7dVerified
New Hampshire State AGbd_2dfd5c9b2d3b25cf2016-06-20 · +14dVerified

Name: Grand Sierra Resort
norm: grand sierra resort

Name: Grand Sierra Resort
norm: grand sierra resort
Industry: Retail & ConsumerllmHospitalityllm

Discovered: Sep 29, 2015
Breach occurred: Feb 19, 2014 – Aug 6, 2015
Undetected for: 587 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 25, 2016
Affected individuals: 111state-resident count only
Data types: PCIFinancial accountIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1041 Exfiltration Over C2 ChannelT1052 Exfiltration Over Physical Medium
Threat actor: ExternalFinancial
Regulator citations: Contacted by law enforcement regarding investigation

During the incident: Cooperated with law enforcement
Retained third party forensics investigators
Enhanced existing security measures
Changes made: Enhanced existing security measures to prevent further unauthorized access
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 36 weeks(251 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Montana State AGJun 6 · first · this page

Washington State AG+4d

Massachusetts State AG+7d

New Hampshire State AG+14d

Pattern: first filing Jun 6 (MT), last Jun 20 (NH) — a 14-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://dojmt.gov/wp-content/uploads/MEI-GSR-Grand-Sierra-Resort.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 6, 2016
Raw hash: af2b8da23aa403b6984846085a05858a1d76a1313291569f30325e26602a0b73

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityGrand Sierra Resort

Victim entityGrand Sierra Resort

Incidentdiscovered Sep 29, 2015

Stated responseCooperated with law enforcement

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov