MalwareFinancial ServicesFinanceRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedGovernment IDIdentity (basic)Financial accountMediumContained

Appalachian Community Federal Credit Union

bd_5928e5e1e3fe7db0 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Oct 7, 2025

Filed

Dec 30, 2025

To disclose

—

Affected

5state residents only

Linked

4 filings

Confidence

66%

Full breach record for Appalachian Community Federal Credit Union →

Appalachian Community Federal Credit Union (ACFCU) reported a data event to the Nebraska Attorney General on December 30, 2025. ACFCU discovered a network disruption on October 7, 2025, and confirmed data exfiltration on October 10, 2025. The incident affected 5 Nebraska residents, involving names, Social Security numbers, and financial account information. ACFCI took the network offline, engaged forensic specialists, reset passwords, and reported the incident to federal law enforcement. Affected individuals received notification letters and were offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

Oct 7, 2025

Begins

Oct 7, 2025

Discovered

Dec 30, 2025

Filed

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Indiana State AGbd_5c231de9fb96a0402025-12-30Verified
Vermont State AGbd_87f56850debb236e2025-12-30Candidate
Massachusetts State AGbd_6db69dbddb9c6bb72025-12-31 · +1dVerified

Name: Kennedys CMK LLP
norm: kennedys cmk

Name: Appalachian Community Federal Credit Union
norm: appalachian community federal credit union
Industry: Financial Servicesllm

Discovered: Oct 7, 2025
Breach occurred: Oct 7, 2025 – Oct 10, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 30, 2025
Affected individuals: 5state-resident count only
Data types: Government IDIdentity (basic)Financial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Reported to Nebraska Office of Attorney GeneralReporting to other state regulators as required

During the incident: Took its network offline
Partnered with forensic specialists to investigate
Disconnected its network from the internet
Reset user passwords
Reported the incident to federal law enforcement
Changes made: Reviewing existing security controls, policies and procedures
Offering twelve (12) months of complimentary credit monitoring and identity protection services through TransUnion
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Indiana State AGDec 30 · first

Vermont State AGDec 30 · first

Nebraska State AGDec 30 · first · this page

Massachusetts State AG+1d

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://nebraska.gov/ago/data-breach/documents/094f8201-b90c-469c-85f6-e9622ba86ac3.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 30, 2025
Raw hash: 152820b44abc263c28076c5093d859c7d2347c5318961cd08c4bc56db99852e9

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityKennedys CMK LLP

Victim entityAppalachian Community Federal Credit Union

Incidentdiscovered Oct 7, 2025

Stated responseTook its network offline

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancenebraska.gov