MalwareRansomwareRansom DemandedData ExfiltratedSupply Chain (3P Vendor)Customer Data InvolvedPIIIDENTITY_BASICLowContained
Duo County Telephone Cooperative Corporation Inc and Cumberland Cellular LLC
bd_87fe4f1545c4e6e1 · schema v1 · pii pii-v1
Full breach record for Duo County Telephone Cooperative Corporation Inc and Cumberland Cellular LLC →Duo Broadband (Duo County Telephone Cooperative Corp. and Cumberland Cellular, LLC) notified the NH AG of a third-party billing vendor (Communications Data Group, Inc.) breach. A threat actor attempted ransomware deployment and gained unauthorized access to customer data (PII) on March 17, 2025. 3 NH residents affected. No evidence of misuse. Kroll engaged for credit monitoring.
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
- bd_1f4bbfe1afc888a5Indiana State AGfiled 2025-05-15Candidate
Source provenance
- Source URL
- https://mm.nh.gov/files/uploads/doj/remote-docs/duo-county-telephone-cooperative-cumberland-cellular-broadband-20250515.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- May 15, 2025
- Raw hash
- 68b891dbd49593bf261fdc3688ffefbec6eccaea3795337dfffdc5a4748547fa
Reporting entity
- Name
- Duo County Telephone Cooperative Corporation Inc and Cumberland Cellular LLCnorm: duo county telephone cooperative corporation inc and cumberland cellular
Victim entity
- Name
- Duo County Telephone Cooperative Corporation Inc and Cumberland Cellular LLCnorm: duo county telephone cooperative corporation inc and cumberland cellular
Incident
- Discovered
- Feb 13, 2025
- Materiality determined
- —
- Notification sent
- May 15, 2025
- Affected individuals
- 3
- Data types
- PIIIDENTITY_BASIC
- Attack vector
- Third-Party / Supply Chain
- MITRE ATT&CK
- T1486 Data Encrypted for ImpactT1078 Valid Accounts
- Threat actor
- ExternalFinancial
- Regulator citations
- Notified New Hampshire Department of Justice
- Initial access
- supply_chain
Compliance
- Time to disclose
- 13 weeks(91 days from discovery to filing)
- Compliance flags
- — (clock not assessable for this source)
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.