HackingFinancial ServicesFinanceStolen CredentialsCustomer Data InvolvedSupply Chain (3P Vendor)Identity (basic)Government IDMediumContained

First Bank & Trust Seymour (American Banking Systems)

bd_fce41d7504ec7ea2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 22, 2020

Filed

Jan 21, 2021

To disclose

13 weeks

Affected

8state residents only

Confidence

66%

Full breach record for First Bank & Trust Seymour (American Banking Systems) →

Third-party software provider American Bank Systems (ABS) notified First Bank & Trust customers in Montana that an unauthorized party accessed ABS's environment on October 22, 2020. The incident involved a backup database containing customer personal information (address, DOB, tax ID). ABS blocked access, implemented endpoint monitoring, and offered credit monitoring via TransUnion.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 13 weeks / 91 days

Oct 22, 2020

Discovered

Jan 21, 2021

Filed

vs. sector median

+5 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed8 affectedView incident

Name: American Bank Systems
norm: american bank

Name: First Bank & Trust Seymour (American Banking Systems)
norm: first bank trust seymour american banking
Industry: Financial Servicesllm

Discovered: Oct 22, 2020
Materiality determined: —
Notification sent: Nov 18, 2020
Affected individuals: 8state-resident count only
Data types: Identity (basic)Government ID
Data elements: Date of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Third party: via American Bank Systems
Initial access: valid_credentials

During the incident: Took steps to block the unauthorized access and mitigate the impact
Began working with impacted institutions to ensure data entrusted to us is adequately protected with rigorous security procedures
Reviewed existing security policies and implemented advanced endpoint monitoring
Offering you access to credit monitoring and identity theft protection services through TransUnion
Changes made: Implemented advanced endpoint monitoring
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 weeks(91 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/fbtSamp.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 21, 2021
Raw hash: f6903c2050e6f69b341302c8b3e95fa30bed60916b181741796fbd9b2ebe65ef

Reporting entityAmerican Bank Systems

Victim entityFirst Bank & Trust Seymour (American Banking Systems)

Incidentdiscovered Oct 22, 2020

Stated responseTook steps to block the unauthorized access and mitigate the impact

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov