Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsTargetedPIIIdentity (basic)CredentialsLowContained

First Financial Bank

bd_9620f188802df1f0 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jul 10, 2018

Filed

Sep 21, 2018

To disclose

10 weeks

Affected

3state residents only

Linked

2 filings

Confidence

65%

Full breach record for First Financial Bank →

First Financial Bank notified Montana residents of a security incident where an employee's email account was compromised via phishing on July 10, 2018. Unauthorized access occurred for one hour. The bank secured the account, engaged forensic investigators, and implemented MFA and access restrictions. No financial fraud was detected.

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Incident timeline

discovery → filing · 10 weeks / 73 days

Jul 10, 2018

Begins

Jul 10, 2018

Discovered

Sep 21, 2018

Filed

vs. sector median

+2 wks slower

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_4f0f1a1ef41b3bb32018-09-21Verified

Name: First Financial Bank
norm: first financial bank

Name: First Financial Bank
norm: first financial bank
Industry: Financial Servicesllm

Discovered: Jul 10, 2018
Breach occurred: Jul 10, 2018 – Jul 10, 2018
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 19, 2018
Affected individuals: 3state-resident count only
Data types: PIIIdentity (basic)Credentials
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: External
Initial access: phishing_link

During the incident: Secured the email account
Engaged a leading cyber security firm to assist with the investigation
Changes made: Implementing multi-factor authentication
Restricting email access outside of FFB’s environment
Providing additional security training for employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(73 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGSep 21 · first

Montana State AGSep 21 · 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/First-Financial-Bank-N.A..pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 21, 2018
Raw hash: 83059679e59f03c198ebf222af47e73624087dde9a5f7f668a17d037ec41346d

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityFirst Financial Bank

Victim entityFirst Financial Bank

Incidentdiscovered Jul 10, 2018

Stated responseSecured the email account

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov