Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)PIILowContained

MembersOwn Credit Union

bd_538822cb788c6f3e · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 13, 2024

Filed

Oct 14, 2024

To disclose

18 weeks

Affected

1state residents only

Confidence

65%

Full breach record for MembersOwn Credit Union →

MembersOwn Credit Union notified Montana residents of a data security incident where unauthorized access to an email account occurred between June 12-13, 2024. The breach was discovered on June 13, 2024, following suspicious activity. Personal information, including names, was present in the affected account. The credit union engaged forensic experts, secured the environment, and offered Experian identity protection services.

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Incident timeline

undetected · 1 days

discovery → filing · 18 weeks / 123 days

Jun 12, 2024

Begins

Jun 13, 2024

Discovered

Oct 14, 2024

Filed

vs. sector median

+9 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: MembersOwn Credit Union
norm: membersown credit union

Name: MembersOwn Credit Union
norm: membersown credit union
Industry: Financial Servicesllm

Discovered: Jun 13, 2024
Breach occurred: Jun 12, 2024 – Jun 13, 2024
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Oct 14, 2024
Affected individuals: 1state-resident count only
Data types: Identity (basic)PII
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Implemented incident response protocols
Took steps to secure the email environment
Engaged independent computer forensic experts to assist with an investigation
Changes made: Changing passwords to email accounts
Reinforcing multi-factor authentication in our email environment
Offering identity theft protection services through Experian
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(123 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/OCP/Consumer-notification-letter-1765.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 14, 2024
Raw hash: 8c051c270c79b029d4e35af01685d65d0f513156f6ab8ceb4b2365477b53afae

Reporting entityMembersOwn Credit Union

Victim entityMembersOwn Credit Union

Incidentdiscovered Jun 13, 2024

Stated responseImplemented incident response protocols

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov