HackingConstructionConstructionStolen CredentialsCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDFinancial accountHealth (basic)MediumContained

MX Holdings US, Inc.

bd_88562918134e7040 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 28, 2021

Filed

May 10, 2022

To disclose

28 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

65%

Full breach record for MX Holdings US, Inc. →

MX Holdings US, Inc. reported unauthorized access to several email accounts. Suspicious activity was observed on October 28, 2021. The breach date listed on the California AG form is August 17, 2021. Affected data may include names, dates of birth, Social Security numbers, driver's license numbers, passport numbers, financial account numbers, and limited medical information. The company engaged forensic investigators and offered one year of credit monitoring.

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Incident timeline

undetected · 72 days

discovery → filing · 28 weeks / 194 days

Aug 17, 2021

Begins

Oct 28, 2021

Discovered

May 10, 2022

Filed

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

Montana State AGbd_d16da87d3ed618ea2022-06-23 · +44dVerified by operator

Name: MX Holdings US, Inc.
norm: mx holdings us

Name: MX Holdings US, Inc.
norm: mx holdings us
Industry: Constructionllm

Discovered: Oct 28, 2021
Breach occurred: Aug 17, 2021
Undetected for: 72 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial accountHealth (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External

During the incident: Engaged a third-party forensic security firm to investigate the issue and confirm the security of our computer systems
Retained a specialized document review vendor to examine the email accounts to determine whether any personal information was contained in the accounts
Offering a complimentary one-year membership of myTrueIdentity online Credit Monitoring by TransUnion
Changes made: Enhancing our technical security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 weeks(194 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 ↗

California State AGMay 10 · first · this page

Montana State AG+44d

Pattern: first filing May 10 (CA), last Jun 23 (MT) — a 44-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://oag.ca.gov/ecrime/databreach/reports/sb24-553265
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 10, 2022
Raw hash: a30c967c19c23bae63cc78b5096fbf04a5ab8d43abcf5df4ce4edb0ca8dad0aa

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMX Holdings US, Inc.

Victim entityMX Holdings US, Inc.

Incidentdiscovered Oct 28, 2021

Stated responseEngaged a third-party forensic security firm to investigate the issue and confirm the security of our computer systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov