HackingFinancial ServicesFinanceStolen CredentialsTargetedPIIIdentity (basic)LowContained

WESTERN COOPERATIVE CREDIT UNION

bd_d8a209eaf72bd7f8 · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 14, 2024

Filed

Feb 10, 2025

To disclose

13 weeks

Affected

15state residents only

Confidence

65%

Full breach record for WESTERN COOPERATIVE CREDIT UNION →

Western Cooperative Credit Union notified Montana residents that an unauthorized third party accessed employee email accounts on November 14, 2024. The incident involved personal information contained in those emails. WCCU secured accounts, engaged forensic investigators, and is offering one year of Experian IdentityWorks credit monitoring.

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Incident timeline

discovery → filing · 13 weeks / 88 days

Nov 14, 2024

Begins

Nov 14, 2024

Discovered

Feb 10, 2025

Filed

vs. sector median

+4 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed15 affectedView incident

Name: WESTERN COOPERATIVE CREDIT UNION
norm: western cooperative credit union

Name: WESTERN COOPERATIVE CREDIT UNION
norm: western cooperative credit union
Industry: Financial Servicesllm

Discovered: Nov 14, 2024
Breach occurred: Nov 14, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 10, 2025
Affected individuals: 15state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Secured the email accounts
Began an internal investigation
Engaged a forensic security firm to further investigate and confirm the security of our email and computer systems
Offering you a complimentary one-year membership of Experian IdentityWorksSM Credit 3B
Changes made: Enhancing our technical security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 weeks(88 days from discovery to filing)
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://dojmt.gov/wp-content/uploads/2025/03/Consumer-notification-letter-192.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 10, 2025
Raw hash: 857732760149dfac42d9323801af87500e59f625aadf4111b325be6dd34ad19b

Reporting entityWESTERN COOPERATIVE CREDIT UNION

Victim entityWESTERN COOPERATIVE CREDIT UNION

Incidentdiscovered Nov 14, 2024

Stated responseSecured the email accounts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov