Social EngineeringFinancial ServicesFinancePhishingCustomer Data InvolvedIdentity (basic)Government IDPIIMediumContained

Community First Bank

bd_e7eb0742abb0c97e · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 2, 2018

Filed

Mar 20, 2018

To disclose

18 days

Affected

1state residents only

Confidence

66%

Full breach record for Community First Bank →2 incidents on file

Community First Bank notified Montana residents of an email account compromise discovered on March 2, 2018. The incident potentially exposed names, DOBs, addresses, SSNs, and driver's license numbers. The bank terminated credentials, engaged forensic investigators, and offered one year of Experian IdentityWorks.

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Incident timeline

discovery → filing · 18 days

Mar 2, 2018

Discovered

Mar 20, 2018

Filed

vs. sector median

6 wks faster

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

Name: Community First Bank
norm: community first bank

Name: Community First Bank
norm: community first bank
Industry: Financial Servicesllm

Discovered: Mar 2, 2018
Materiality determined: —
Notification sent: Mar 20, 2018
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDPII
Data elements: Social Security numberDate of birth
Attack vector: Phishing
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: External
Initial access: phishing_link

During the incident: Terminated the account credentials
Retained a leading forensic security firm to investigate and confirm the security of our email systems
Searched the account for personal information
Offering a complimentary one-year membership of Experian IdentityWorks Credit 3B
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 days(18 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/Community-First-Bank.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 20, 2018
Raw hash: a3d1aa78c29ef3f09f3ccf2ea74deba7e9cd3b10e40c9552d632097fadc4d95d

Reporting entityCommunity First Bank

Victim entityCommunity First Bank

Incidentdiscovered Mar 2, 2018

Stated responseTerminated the account credentials

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov