Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedPIIIdentity (basic)LowContained

Bank Northwest

bd_2066b9bac2275739 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 21, 2020

Filed

Nov 9, 2020

To disclose

16 weeks

Affected

1state residents only

Confidence

66%

Full breach record for Bank Northwest →2 incidents on file

Northwest Bank notified Montana residents of a data security incident where unauthorized access to an employee email account occurred on July 20, 2020, discovered on July 21, 2020. Personal information may have been involved. The bank secured the account, engaged cybersecurity experts, enhanced email security, provided employee training, and offered 12 months of credit monitoring.

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Incident timeline

undetected · 1 days

discovery → filing · 16 weeks / 111 days

Jul 20, 2020

Begins

Jul 21, 2020

Discovered

Nov 9, 2020

Filed

vs. sector median

+7 wks slower

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

Name: Bank Northwest
norm: bank northwest

Name: Bank Northwest
norm: bank northwest
Industry: Financial Servicesllm

Discovered: Jul 21, 2020
Breach occurred: Jul 20, 2020
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Nov 9, 2020
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Secured the account
Began an investigation
Engaged cybersecurity experts to assist us with the investigation
Enhanced the security of our email environment
Completed additional security awareness training for all employees
Offering 12 months of credit and identity monitoring services at no cost
Changes made: Enhanced the security of our email environment
Completed additional security awareness training for all employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 weeks(111 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/northwSamp-1.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 9, 2020
Raw hash: 29c7e39ceb4fe15ea4539dbe85aed4399ef66258e9aa4562bcb019b980d9c4b9

Reporting entityBank Northwest

Victim entityBank Northwest

Incidentdiscovered Jul 21, 2020

Stated responseSecured the account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov