HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedIdentity (basic)CredentialsLowContained

WESTERRA CREDIT UNION

bd_e931d17b035e43b3 · schema v1 · pii pii-v1

Severity

Low

Discovered

Mar 2, 2022

Filed

Jul 19, 2022

To disclose

20 weeks

Affected

4state residents only

Linked

2 filings

Confidence

65%

Full breach record for WESTERRA CREDIT UNION →2 incidents on file

Westerra Credit Union notified Montana residents of a data breach involving unauthorized access to a single email account between Feb 25 and Mar 2, 2022. The incident exposed names and other personal data. Westerra secured the account, engaged forensic investigators, and offered one year of Experian IdentityWorks credit monitoring.

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Incident timeline

undetected · 5 days

discovery → filing · 20 weeks / 139 days

Feb 25, 2022

Begins

Mar 2, 2022

Discovered

Jul 19, 2022

Filed

vs. sector median

+12 wks slower

This filing is one of 2 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Maine State AGbd_895b15c5a4022a492022-07-19Candidate

Name: WESTERRA CREDIT UNION
norm: westerra credit union

Name: WESTERRA CREDIT UNION
norm: westerra credit union
Industry: Financial Servicesllm

Discovered: Mar 2, 2022
Breach occurred: Feb 25, 2022 – Mar 2, 2022
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 10, 2022
Affected individuals: 4state-resident count only
Data types: Identity (basic)Credentials
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Initial access: valid_credentials

During the incident: Secured the email account
Began an internal investigation
Engaged a forensic security firm to investigate and confirm the security of our email and computer systems
Offering 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: 20 weeks(139 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Maine State AGJul 19 · first

Montana State AGJul 19 · first · this page

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/OCP/Consumer-Notification-Letter-411.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 19, 2022
Raw hash: b67f830e8655fe40e2f138440a10699a01133d4ffcabb6de7508f2eaef7cb0ea

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityWESTERRA CREDIT UNION

Victim entityWESTERRA CREDIT UNION

Incidentdiscovered Mar 2, 2022

Stated responseSecured the email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov