HackingOtherStolen CredentialsData ExfiltratedData PublishedRansom DemandedTargetedIdentity (basic)Government IDMediumContained

MGM RESORTS INTERNATIONAL

bd_387b35a450277505 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 10, 2019

Filed

Sep 4, 2019

To disclose

8 weeks

Affected

7state residents only

Linked

2 filings

Confidence

67%

Full breach record for MGM RESORTS INTERNATIONAL →4 incidents on file

MGM Resorts International notified the NH AG that an unauthorized individual accessed its internal system on July 7, 2019, using a compromised third-party integration account. The actor exfiltrated data including names, addresses, phone numbers, and NH driver's license numbers. Data was posted on a closed forum for sale and removed on July 24. 7 NH residents affected. MGM engaged forensic firms, notified law enforcement, and offered credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 3 days

discovery → filing · 8 weeks / 56 days

Jul 7, 2019

Begins

Jul 10, 2019

Discovered

Sep 4, 2019

Filed

vs. sector median

+2 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Montana State AGbd_51ff5bcc7bd9732e2019-09-05 · +1dCandidate

Name: MGM RESORTS INTERNATIONAL
norm: mgm resorts
Domain: mgmresorts.com

Name: MGM RESORTS INTERNATIONAL
norm: mgm resorts
Domain: mgmresorts.com
Industry: Otherllm

Discovered: Jul 10, 2019
Breach occurred: Jul 7, 2019
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 4, 2019
Affected individuals: 7state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Reported the incident to law enforcement
Initial access: valid_credentials

During the incident: Engaged two forensic investigation firms to conduct an analysis of the data
Reported the incident to law enforcement immediately once MGM discovered the matter
Offering twelve (12) months of complimentary credit monitoring and identity monitoring services and $1,000,000 of reimbursement insurance to the affected residents through ID Experts
Changes made: Implemented additional safeguards to improve further data security related to external software incidents
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(56 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

New Hampshire State AGSep 4 · first · this page

Montana State AG+1d

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://mm.nh.gov/files/uploads/doj/remote-docs/mgm-resorts-20190904.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 4, 2019
Raw hash: 46c05c340c7573356695e15e25099b961dd2c2970c7e25fb5d8e36955d81b6bb

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMGM RESORTS INTERNATIONAL

Victim entityMGM RESORTS INTERNATIONAL

Incidentdiscovered Jul 10, 2019

Stated responseEngaged two forensic investigation firms to conduct an analysis of the data

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov