MalwareFinancial ServicesFinanceRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountCriticalContained

NATIONSTAR MORTGAGE LLC

bd_ec18ec8370ea5376 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Oct 31, 2023

Filed

Dec 15, 2023

To disclose

6 weeks

Affected

408,616state residents only

Linked

11 filings

Confidence

69%

Full breach record for NATIONSTAR MORTGAGE LLC →11 incidents on file

Nationstar Mortgage LLC (dba Mr. Cooper) reports a supplemental breach affecting 408,616 Washington residents. Unauthorized access occurred Oct 30-Nov 1, 2023, involving PII, SSNs, and bank details. Incident detected Oct 31, 2023. Ransomware attack led to data exfiltration. Credit monitoring provided.

J jump to incidentP pin to compareR raw source

Washington clock⏱ WA AG >30d6 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 1 days

discovery → filing · 6 weeks / 45 days

Oct 30, 2023

Begins

Oct 31, 2023

Discovered

Dec 15, 2023

Filed

vs. sector median

2 wks faster

This filing is one of 11 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Delaware State AGbd_1649a1b2c61961c42023-12-15Verified
California State AGbd_57eb457f3eb2112d2023-12-15Verified
Montana State AGbd_5d5578f4cbaaad522023-12-15Verified
Maine State AGbd_94029d67f539973d2023-12-15Verified

Show 6 more filings ↓up to 348d gap

Oregon State AGbd_bcd8a251801840a22023-12-15Verified
Massachusetts State AGbd_d73092edf21768402023-12-15Verified
South Carolina State AGbd_c8e492a4998540cc2023-12-18 · +3dVerified
New Hampshire State AGbd_66a3873bc3c9facf2023-12-19 · +4dVerified
California State AGbd_0b70ea800f8666122024-03-22 · +98dVerified
Illinois State AGbd_d9053568a4f8d29b2023-01-01 · +348dCandidate

Name: AKIN, GUMP, STRAUSS, HAUER, & FELD LLP
norm: akin gump strauss hauer feld

Name: NATIONSTAR MORTGAGE LLC
norm: nationstar mortgage
Also named: Nationstar Mortgage LLCdba oflegal entity
Mr. Cooperdba oftrade name
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: 408,616state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: NameFinancial account numberDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Previously reported to Washington Attorney General’s Office on December 15, 2023

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: 6 weeks(45 days from discovery to filing)
Compliance flags: WA AG >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 10 states

View merged incident ↗

Illinois State AGJan 1 · first

Delaware State AG+348d

California State AG+348d

Montana State AG+348d

Maine State AG+348d

Oregon State AG+348d

Massachusetts State AG+348d

Washington State AG+348d · this page

South Carolina State AG+351d

New Hampshire State AG+352d

California State AG+446d

Pattern: first filing Jan 1 (IL), last Mar 22 (CA) — a 446-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/BreachA27279.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 15, 2023
Raw hash: 28105efdb522ab4e9edb2755414b13b60fc6f05ddfcd6f6c3c62818b702ca3b6

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityAKIN, GUMP, STRAUSS, HAUER, & FELD LLP

Victim entityNATIONSTAR MORTGAGE LLC

Incidentdiscovered Oct 31, 2023

Stated responseInitiated response protocols

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com