Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedTargetedPIIIdentity (basic)LowContained

Bank of Eastern Oregon

bd_0ad975e39920fcd8 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 15, 2022

Filed

Jan 20, 2023

To disclose

18 weeks

Affected

3state residents only

Linked

3 filings

Confidence

65%

Full breach record for Bank of Eastern Oregon →

Bank of Eastern Oregon notified Montana residents of a data incident discovered on September 15, 2022. Unauthorized access occurred to employee email accounts between September 8-14, 2022, likely via phishing. Customer names and other personal information may have been accessed. The bank engaged forensic investigators and offered 12 months of credit monitoring.

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Incident timeline

undetected · 7 days

discovery → filing · 18 weeks / 127 days

Sep 8, 2022

Begins

Sep 15, 2022

Discovered

Jan 20, 2023

Filed

vs. sector median

+9 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Oregon State AGbd_18e688004f8a34d32023-01-20Verified by operator
Massachusetts State AGbd_a659cf7583fefef62023-01-20Verified

Name: Bank of Eastern Oregon
norm: bank of eastern oregon

Name: Bank of Eastern Oregon
norm: bank of eastern oregon
Industry: Financial Servicesllm

Discovered: Sep 15, 2022
Breach occurred: Sep 8, 2022 – Sep 14, 2022
Undetected for: 7 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 20, 2023
Affected individuals: 3state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Engaged a leading cybersecurity firm to assist with the investigation
Took steps to investigate the activity and secure the accounts
Offering complimentary credit monitoring and identity protection services
Changes made: Implemented additional security measures to further protect our email environment
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(127 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Oregon State AGJan 20 · first

Massachusetts State AGJan 20 · first

Montana State AGJan 20 · 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-46.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 20, 2023
Raw hash: 2f18773c37936a501404b00c6c4c620146604504486133e27f7f9444f63048f7

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityBank of Eastern Oregon

Victim entityBank of Eastern Oregon

Incidentdiscovered Sep 15, 2022

Stated responseEngaged a leading cybersecurity firm to assist with the investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov