MalwareHospitalityTechnologyHospitalityRansomwareData ExfiltratedCustomer Data InvolvedPCIFinancial accountIdentity (basic)LowResolved

HYATT HOTELS CORPORATION

bd_02b089e878b47abd · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 24, 2015

Filed

Jan 14, 2016

To disclose

7 weeks

Affected

15state residents only

Linked

5 filings

Confidence

69%

Full breach record for HYATT HOTELS CORPORATION →3 incidents on file

Hyatt Hotels Corporation notified Washington AG of a malware incident targeting payment card data at select locations between Aug 13 and Dec 8, 2015. 15 Washington residents were identified with track 1 data exposure. Hyatt engaged third-party experts, notified law enforcement, and offered one year of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 103 days

discovery → filing · 7 weeks / 51 days

Aug 13, 2015

Begins

Nov 24, 2015

Discovered

Jan 14, 2016

Filed

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

California State AGbd_bc7429716d81c1022016-01-14Verified
Montana State AGbd_e41f481fb05b9df92016-01-14Verified
Massachusetts State AGbd_bd44d7ae4cd4995f2016-01-15 · +1dVerified
South Carolina State AGbd_c0076be75d1036662016-01-19 · +5dVerified

Name: HYATT HOTELS CORPORATION
norm: hyatt hotels
Domain: hyatt.com

Name: HYATT HOTELS CORPORATION
norm: hyatt hotels
Domain: hyatt.com
Industry: HospitalityllmTechnologyllm

Discovered: Nov 24, 2015
Breach occurred: Aug 13, 2015 – Dec 8, 2015
Undetected for: 103 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 19, 2016
Affected individuals: 15state-resident count only
Data types: PCIFinancial accountIdentity (basic)
Data elements: Financial account numberName
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 100-199dexposure 100-199d
WA-stated discovery: Found while ongoing
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1052 Exfiltration Over Physical Medium
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Office of the Attorney General
Initial access: external_remote_services

During the incident: Hired leading third-party security experts to examine its payment card network
Coordinating its efforts with law enforcement and the payment card networks
Notified law enforcement and the payment card networks
Changes made: Strengthen the security of its systems in order to help prevent this from happening in the future
Arranged for CSID to provide one year of CSID’s Protector services to affected customers at no cost
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(51 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

California State AGJan 14 · first

Montana State AGJan 14 · first

Washington State AGJan 14 · first · this page

Massachusetts State AG+1d

South Carolina State AG+5d

Pattern: first filing Jan 14 (CA), last Jan 19 (SC) — a 5-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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM9605.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 14, 2016
Raw hash: c94af4156c75a960491165357438ec1f760f3974473f7c8e100285073aceaa08

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityHYATT HOTELS CORPORATION

Victim entityHYATT HOTELS CORPORATION

Incidentdiscovered Nov 24, 2015

Stated responseHired leading third-party security experts to examine its payment card network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com