MalwareFinancial ServicesFinanceRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountPIIHighContained

Centennial Bank

bd_8a0e93f532310496 · schema v1 · pii pii-v1

Severity

High

Discovered

Apr 7, 2023

Filed

Apr 19, 2024

To disclose

13 months

Affected

3,044state residents only

Linked

2 filings

Confidence

70%

Full breach record for Centennial Bank →2 incidents on file

Centennial Bank notified Washington residents of a ransomware incident occurring April 6-7, 2023. The breach exposed names, SSNs, DOBs, driver's licenses, and financial/payment card data. 3,044 Washington residents were notified on April 19, 2024. The bank engaged forensic specialists, notified law enforcement, and provided 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d13 months discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 1 days

discovery → filing · 13 months / 378 days

Apr 6, 2023

Begins

Apr 7, 2023

Discovered

Apr 19, 2024

Filed

vs. sector median

+46 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_8ace614aa38e29d92024-04-19Verified

Name: Centennial Bank
norm: centennial bank
Industry: Finance

Name: Centennial Bank
norm: centennial bank
Industry: Finance
Industry: Financial Servicesllm

Discovered: Apr 7, 2023
Breach occurred: Apr 6, 2023 – Apr 7, 2023
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: Apr 19, 2024
Affected individuals: 3,044state-resident count only
Data types: Identity (basic)Government IDFinancial accountPII
Data elements: NameSocial Security numberDriver's licence numberFinancial account numberDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notified federal law enforcement regarding the eventproviding written notice of this event to relevant state regulators

During the incident: Launched an investigation to understand what occurred
Methodically containing the network
Engaged third-party cybersecurity specialists to assist Centennial in determining the nature and scope of the activity
Completed a thorough programmatic and manual review of accessible files
Notified federal law enforcement regarding the event
Providing access to credit monitoring services for twelve (12) months, through CyEx
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this event to relevant state regulators
Providing written notice of this event to the three major credit reporting agencies
Changes made: Continually monitors and addresses technical security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 13 months(378 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGApr 19 · first

Washington State AGApr 19 · 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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA28750.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 19, 2024
Raw hash: 63107add360a027c35f8ff62317cd18cbf8c777d5ef2ea00fe6680ddaeea13c9

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityCentennial Bank

Victim entityCentennial Bank

Incidentdiscovered Apr 7, 2023

Stated responseLaunched an investigation to understand what occurred

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com