Social EngineeringFinancial ServicesFinancePhishingStolen CredentialsCustomer Data InvolvedPIIIdentity (basic)LowContained

Great Southern Bank (Mississippi)

bd_8b0f7f48865c8835 · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 1, 2020

Filed

Aug 7, 2020

To disclose

18 weeks

Affected

1state residents only

Confidence

66%

Full breach record for Great Southern Bank (Mississippi) →

Great Southern Bank notified Montana AG of a data breach in April 2020. An employee's email account was compromised via unauthorized access, likely through phishing. Customer PII, including names and contact info, was exposed. The bank reset passwords, engaged Kroll for forensics, and offered one year of credit monitoring.

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Incident timeline

discovery → filing · 18 weeks / 128 days

Apr 1, 2020

Discovered

Aug 7, 2020

Filed

vs. sector median

+10 wks slower

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

Name: Great Southern Bank (Mississippi)
norm: great southern bank mississippi

Name: Great Southern Bank (Mississippi)
norm: great southern bank mississippi
Industry: Financial Servicesllm

Discovered: Apr 1, 2020
Materiality determined: —
Notification sent: —
Affected individuals: 1state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified federal regulators regarding this incident
Initial access: phishing_link

During the incident: Engaged security experts to help determine what occurred
Reset the password to the account
Implemented additional security controls to prevent further unauthorized access to the email account
Notified federal regulators regarding this incident
Engaged Kroll, a global leader in risk mitigation and response
Arranged for identity monitoring services to be made available for one year at no cost
Changes made: Implemented additional security controls to prevent further unauthorized access to the email account
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(128 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/Great-Southern-Bank-Mississipp-Consumer-ltr.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 7, 2020
Raw hash: 6f491a5bbc03300fde9573fd6f0654e84fb0cf00be36b9c56279f45484ddce44

Reporting entityGreat Southern Bank (Mississippi)

Victim entityGreat Southern Bank (Mississippi)

Incidentdiscovered Apr 1, 2020

Stated responseEngaged security experts to help determine what occurred

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov