HackingFinancial ServicesFinanceStolen CredentialsCapture Stored DataData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

Nationstar Mortgage LLC

bd_834e3ffcf5af1c48 · schema v1 · pii pii-v1

Severity

High

Discovered

Oct 31, 2023

Filed

Dec 5, 2023

To disclose

5 weeks

Affected

55,958state residents only

Linked

5 filings

Confidence

63%

Nationstar Mortgage LLC (dba Mr. Cooper) disclosed a data breach where unauthorized access occurred between Oct 30 and Nov 1, 2023. Suspicious activity was detected on Oct 31, 2023. Personal information including names, SSNs, DOBs, and bank account numbers were accessed. The company shut down systems, engaged forensic experts, and notified law enforcement. Credit monitoring services were offered to affected individuals.

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Hawaii clock✓ HI CRA notice due5 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 1 days

discovery → filing · 5 weeks / 35 days

Oct 30, 2023

Begins

Oct 31, 2023

Discovered

Dec 5, 2023

Filed

vs. sector median

4 wks faster

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

SEC 8-Kbd_eb26991231ea68882023-12-15 · +10dVerified
SEC 8-Kbd_c2d404959f98c3892023-11-09 · +26dVerified
SEC 8-Kbd_d32ed619bafc52c52023-11-02 · +33dCandidate
Delaware State AGbd_b07179e304b6e55f2024-03-26 · +112dVerified

Name: NATIONSTAR MORTGAGE LLC
norm: nationstar mortgage

Name: Nationstar Mortgage LLC
norm: nationstar mortgage
Industry: Financial Servicesllm

Discovered: Oct 31, 2023
Breach occurred: Oct 30, 2023 – Nov 1, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Dec 1, 2023
Affected individuals: 55,958state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Date of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: contacted law enforcement
Initial access: valid_credentials

During the incident: Initiated response protocols
Launched an investigation with the assistance of cybersecurity experts
Contacted law enforcement
Shut down our systems to contain the incident
Locking down our systems
Changing account passwords
Restoring our systems
Monitoring the dark web
Changes made: Further enhancing the security of our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(35 days from discovery to filing)
Compliance flags: HI CRA notice due
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 2 states

View merged incident ↗

SEC 8-KNov 2 · first

SEC 8-K+7d

Hawaii State AG+33d · this page

SEC 8-K+43d

Delaware State AG+145d

Pattern: first filing Nov 2, last Mar 26 (DE) — a 145-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://cca.hawaii.gov/wp-content/uploads/2026/05/2024-0091.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 5, 2023
Raw hash: 75792c1b0b84ebf08271721e70dd6bff0aeac5734586fe13d1198bc939e12dcd

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityNATIONSTAR MORTGAGE LLC

Victim entityNationstar Mortgage LLC

Incidentdiscovered Oct 31, 2023

Stated responseInitiated response protocols

ComplianceHI CRA notice due

Extraction provenanceno artifact recorded

Source provenancecca.hawaii.gov