HackingFinancial ServicesFinanceSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

OneWest Bank, FSB

bd_83a67c48f4e25596 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Apr 23, 2013

To disclose

—

Affected

Not disclosed

Confidence

65%

Full breach record for OneWest Bank, FSB →

OneWest Bank, FSB notified customers that a third-party service provider suffered a network intrusion during Q1 2011. Unauthorized access exposed customer names, addresses, birthdates, phone numbers, driver's license numbers, passport numbers, and Social Security Numbers. The bank states it does not believe data was copied or downloaded. The service provider cooperated with the US Secret Service and engaged forensic firms. OneWest offered 12 months of free credit monitoring.

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Incident timeline

Jan 1, 2011

Begins

Apr 23, 2013

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: OneWest Bank, FSB
norm: onewest bank fsb
Domain: onewestbank.com

Name: OneWest Bank, FSB
norm: onewest bank fsb
Domain: onewestbank.com
Industry: Financial Servicesllm

Discovered: —
Breach occurred: Jan 1, 2011 – Mar 31, 2011
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain Compromise
Threat actor: External
Regulator citations: Cooperated with law enforcement including the United States Secret Service
Third party: via service provider
Initial access: supply_chain

During the incident: Service provider enhanced the security of its network systems
Service provider cooperated with law enforcement including the United States Secret Service
Service provider investigated using leading outside security firms
OneWest Bank arranged for ID Protection Service to provide 12 months of credit monitoring services free of charge
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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/sb24-41287
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 23, 2013
Raw hash: 10481a7da6a92ecefd18e9b97d1763311c3abadc80e9df4dd7df5a58082f0631

Reporting entityOneWest Bank, FSB

Victim entityOneWest Bank, FSB

IncidentThird-Party / Supply Chain

Stated responseService provider enhanced the security of its network systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov