HackingTelecom & MediaInformationStolen CredentialsCustomer Data InvolvedIdentity (basic)AuthenticationBehaviorLowContained

USCC Services, LLC

bd_ea0ecc160f5a5082 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 13, 2021

Filed

Dec 29, 2021

To disclose

16 days

Affected · nationwide

4055 in this filing

Linked

2 filings

Confidence

66%

Full breach record for USCC Services, LLC →6 incidents on file

USCC Services, LLC (d/b/a UScellular) detected unauthorized access to its billing system on December 13, 2021, occurring between December 13-19, 2021. Unauthorized individuals accessed wireless customer accounts containing names, addresses, PINs, and phone numbers to fraudulently port numbers. Approximately 405 customers were affected nationwide, including 5 New Hampshire residents. UScellular disconnected affected systems, reset employee credentials, changed customer PINs, and reported the incident to law enforcement and the FCC.

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Incident timeline

discovery → filing · 16 days

Dec 13, 2021

Begins

Dec 13, 2021

Discovered

Dec 29, 2021

Filed

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

Maine State AGbd_aa071c253657f1ff2021-12-23 · +6dCandidate

Name: USCC Services, LLC
norm: uscc services
Domain: uscellular.com

Name: USCC Services, LLC
norm: uscc services
Domain: uscellular.com
Also named: USCC Services, LLCdba oflegal entity
UScellulardba oftrade name
Industry: Telecom & Mediallm

Discovered: Dec 13, 2021
Breach occurred: Dec 13, 2021 – Dec 19, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 23, 2021
Affected individuals: 405state + nationwide
Data types: Identity (basic)AuthenticationBehavior
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Reported the incident to law enforcement in accordance with the requirements of the Federal Communications Commission as well as certain state agencies
Initial access: valid_credentials

During the incident: Disconnected the computer accessed by the unauthorized individuals from the internet
Requested immediate removal from the internet of the fraudulent websites used by the fraudsters
Reset the login credentials for every employee impacted in this incident at the retail stores
Changed the impacted customers’ PIN and security question/answer
Reported the incident to law enforcement in accordance with the requirements of the Federal Communications Commission as well as certain state agencies
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 days(16 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 ↗

Maine State AGDec 23 · first

New Hampshire State AG+6d · this page

Pattern: first filing Dec 23 (ME), last Dec 29 (NH) — a 6-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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://mm.nh.gov/files/uploads/doj/remote-docs/uscc-services-dba-uscellular-20211229.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 29, 2021
Raw hash: 4287f311e4abe755364155cb592b9376b90e09b10aa6d2789871138bac7ad58c

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityUSCC Services, LLC

Victim entityUSCC Services, LLC

Incidentdiscovered Dec 13, 2021

Stated responseDisconnected the computer accessed by the unauthorized individuals from the internet

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov