Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedTargetedPIIIdentity (basic)CredentialsLowContained

Diamond Lakes Federal Credit Union

bd_744dc3f88c415e6f · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 6, 2022

Filed

Jun 1, 2023

To disclose

25 weeks

Affected

2state residents only

Linked

4 filings

Confidence

65%

Full breach record for Diamond Lakes Federal Credit Union →

Diamond Lakes Federal Credit Union notified Montana residents of a data breach involving unauthorized access to an employee email account and certain files from Dec 1-6, 2022. Discovered Dec 6, 2022. Affected data included names and other PII. The credit union engaged forensic specialists, reset passwords, and offered credit monitoring.

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Incident timeline

undetected · 5 days

discovery → filing · 25 weeks / 177 days

Dec 1, 2022

Begins

Dec 6, 2022

Discovered

Jun 1, 2023

Filed

vs. sector median

+17 wks slower

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

Maine State AGbd_3d0e610395e3c8522023-06-01Candidate
Massachusetts State AGbd_bcc9d549c0d2e9532023-06-01Verified
Indiana State AGbd_48f32dd6dc9b91802023-05-31 · +1dVerified

Name: Diamond Lakes Federal Credit Union
norm: diamond lakes federal credit union

Name: Diamond Lakes Federal Credit Union
norm: diamond lakes federal credit union
Industry: Financial Servicesllm

Discovered: Dec 6, 2022
Breach occurred: Dec 1, 2022 – Dec 6, 2022
Undetected for: 5 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 31, 2023
Affected individuals: 2state-resident count only
Data types: PIIIdentity (basic)Credentials
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Took swift action to secure our email system and network
Launched an internal investigation
Engaged leading, independent cybersecurity specialists to investigate the full scope of this incident
Performing password resets
Implemented additional technical safeguards
Changes made: Implemented additional technical safeguards to further enhance the security of information in our possession and prevent similar incidents from happening in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 25 weeks(177 days from discovery to filing)
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 ↗

Indiana State AGMay 31 · first

Maine State AG+1d

Massachusetts State AG+1d

Montana State AG+1d · 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-327.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 1, 2023
Raw hash: 3850601a1e15570730cb716cfce13e720a0109a6e01c5cef67342ea209c722e6

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityDiamond Lakes Federal Credit Union

Victim entityDiamond Lakes Federal Credit Union

Incidentdiscovered Dec 6, 2022

Stated responseTook swift action to secure our email system and network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov