HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedCredentialsFinancial accountPIILowContained

MUFG Union Bank, National Association

bd_63fee85137cfc7c3 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Dec 7, 2018

To disclose

—

Affected

1state residents only

Linked

4 filings

Confidence

66%

Full breach record for MUFG Union Bank, National Association →2 incidents on file

MUFG Union Bank, NA notified Montana residents that an unauthorized third party used stolen login credentials to access Union Bank Online/Mobile Banking accounts in November 2018. Compromised data included credentials, names, partial/full bank account numbers, balances, and transaction info. The bank blocked access, reset passwords, and reported to law enforcement. Affected individuals were offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

Nov 1, 2018

Begins

Dec 7, 2018

Filed

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

California State AGbd_2a4c92a7314b5b1b2018-12-11 · +4dVerified
New Hampshire State AGbd_5d92c51a2bb560e82018-12-13 · +6dVerified
Massachusetts State AGbd_2c20dff790356fd52018-12-14 · +7dVerified

Name: MUFG Union Bank, National Association
norm: mufg union bank national

Name: MUFG Union Bank, National Association
norm: mufg union bank national
Industry: Financial Servicesllm

Discovered: —
Breach occurred: Nov 1, 2018 – Nov 30, 2018
Materiality determined: —
Notification sent: Dec 7, 2018
Affected individuals: 1state-resident count only
Data types: CredentialsFinancial accountPII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: reported this issue to law enforcement authorities
Initial access: valid_credentials

During the incident: Took measures to block unauthorized access to the affected Union Bank accounts
Reset the Password of affected individuals
Encouraged them to reset their Union Bank Online and Mobile Banking User ID
Reported this issue to law enforcement authorities
Changes made: Offering 12 months of complimentary credit monitoring through Cyberscout
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.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Montana State AGDec 7 · first · this page

California State AG+4d

New Hampshire State AG+6d

Massachusetts State AG+7d

Pattern: first filing Dec 7 (MT), last Dec 14 (MA) — a 7-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://dojmt.gov/wp-content/uploads/MUFG-Union-Bank.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 7, 2018
Raw hash: 0a00bae48f67550c12ae6cb18c6009d6c06ea53c2ad715579d2baccc9827952f

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityMUFG Union Bank, National Association

Victim entityMUFG Union Bank, National Association

IncidentUnauthorized Access

Stated responseTook measures to block unauthorized access to the affected Union Bank accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov