HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Financial accountLowContained

Bank of Colorado

bd_b21644c830ae1eaa · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 9, 2023

Filed

Dec 8, 2023

To disclose

9 weeks

Affected

5state residents only

Linked

2 filings

Confidence

65%

Full breach record for Bank of Colorado →

Bank of Colorado notified Montana residents of a data breach involving its third-party vendor's MOVEit Transfer software. Unauthorized actors accessed files containing names, bank account numbers, and routing numbers between May 27-31, 2023. The vendor was notified on October 9, 2023. Bank of Colorado offered two years of identity monitoring via Kroll.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 135 days

discovery → filing · 9 weeks / 60 days

May 27, 2023

Begins

Oct 9, 2023

Discovered

Dec 8, 2023

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_668fadacd2c3f1062023-12-08Verified

Name: Bank of Colorado
norm: bank of colorado

Name: Bank of Colorado
norm: bank of colorado
Industry: Financial Servicesllm

Discovered: Oct 9, 2023
Breach occurred: May 27, 2023 – May 31, 2023
Undetected for: 135 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 9, 2023
Affected individuals: 5state-resident count only
Data types: Identity (basic)Financial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notified regulatory bodies as required
Initial access: exploit_public_facing

During the incident: Launched a comprehensive investigation
Identified individuals affected
Notified regulatory bodies
Service provider remediated all technical vulnerabilities and patched systems
Service provider mobilized a technical response team to examine relevant MOVEit Transfer systems
Arranged for complimentary free identity monitoring service through Kroll for two years
Changes made: Service provider remediated all technical vulnerabilities and patched systems in accordance with the MOVEit software provider’s guidelines
Service provider mobilized a technical response team to examine the relevant MOVEit Transfer systems and ensure that there were no further vulnerabilities
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 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 8 · first

Montana State AGDec 8 · 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/OCP/Consumer-notification-letter-933.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 8, 2023
Raw hash: a82b3a392988027d580db540bcdfe8fb36ef6dcbf59acef3db6c053b6d8e486e

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityBank of Colorado

Victim entityBank of Colorado

Incidentdiscovered Oct 9, 2023

Stated responseLaunched a comprehensive investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov