FEDERALMalwareTelecom & MediaInformationRansomwareData EncryptedLowResolved

Sinclair, Inc.

bd_6a6b896505d36362 · schema v1 · pii pii-v1

Severity

Low

Discovered

Oct 1, 2021

Filed

Feb 29, 2024

To disclose

29 months

Affected

Not disclosed

Confidence

83%

Full breach record for Sinclair, Inc. →

Sinclair's 10-K Item 1C cybersecurity disclosure references a ransomware attack in October 2021 that had a material adverse impact on the company's business strategy, results of operations, or financial condition. The filing describes the company's ongoing cyber risk management program but does not disclose affected-individual counts, threat-actor attribution, or financial impact figures for the 2021 incident.

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Incident timeline

discovery → filing · 29 months / 881 days

Oct 1, 2021

Begins

Oct 1, 2021

Discovered

Feb 29, 2024

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.No incident reportedView incident

Name: Sinclair Realty Inc.
norm: sinclair realty

Name: Sinclair, Inc.
norm: sinclair
Domain: sinclair.com
Industry: Telecom & Mediallm

Discovered: Oct 1, 2021
Breach occurred: Oct 1, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: —
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial

Changes made: Expanded investments in IT security, including additional end-user training
Using layered defenses
Identifying and protecting critical assets
Strengthening monitoring and alerting
Engaging experts
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 29 months(881 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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 filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/1971213/000197121324000011/sbgi-20231231.htm
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Feb 29, 2024
Raw hash: ad4afa5c0a33603e652089216d543a42c3ce0053d2b91758f8f9e1139284d9de

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Reporting entitySinclair Realty Inc.

Victim entitySinclair, Inc.

Incidentdiscovered Oct 1, 2021

Stated responseExpanded investments in IT security, including additional end-user training

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing