MalwareFinancial ServicesTechnologyFinanceRansomwareData ExfiltratedData EncryptedIdentity (basic)Government IDFinancial accountMediumContained

American Bank Systems

bd_6ec00fc3ff605000 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 22, 2020

Filed

Dec 16, 2020

To disclose

8 weeks

Affected

13state residents only

Linked

2 filings

Confidence

67%

American Bank Systems (ABS) notified NexTier Bank customers of a cyber incident where ABS systems were infected with malware, leading to unauthorized acquisition of customer data including names, SSNs, and financial account details. ABS took systems offline, engaged forensic specialists, and offered credit monitoring.

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Incident timeline

discovery → filing · 8 weeks / 55 days

Oct 22, 2020

Discovered

Dec 16, 2020

Filed

vs. sector median

1 wks faster

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_3b0c47e1cec361e22020-12-16Verified

Name: American Bank Systems
norm: american bank systems

Name: American Bank Systems
norm: american bank systems
Industry: Financial ServicesllmTechnologyllm

Discovered: Oct 22, 2020
Materiality determined: —
Notification sent: —
Affected individuals: 13state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial

During the incident: Took systems offline
Launched an investigation
Engaged third-party computer forensic specialists
Resetting passwords of ABS users
Offering credit monitoring and identity theft protection services through TransUnion
Changes made: Reviewed existing security policies
Implemented additional measures including advanced endpoint monitoring
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(55 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 AGDec 16 · first

Montana State AGDec 16 · 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/Nextier-NOtif.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 16, 2020
Raw hash: e76201286a7c2e44f7c80de1794a15dc13ef520dc70e0c76dafc223d4de3c909

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityAmerican Bank Systems

Victim entityAmerican Bank Systems

Incidentdiscovered Oct 22, 2020

Stated responseTook systems offline

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov