{"schema_version":"secwatch.filing_event.v1","accession":"0001537435-23-000036","form_type":"8-K","ticker":"TGEN","cik":"0001537435","company_name":"TECOGEN INC.","filed_at":"2023-05-03T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.318360+00:00","generated_at":"2026-06-16T01:03:04.769416+00:00","sec_items":["8.01"],"event_type":"cyber","sentiment":"negative","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Tecogen discloses ransomware attack on April 28; network restored by May 1","bullets":["Attack was a spear phishing attempt via the company's VPN; traces found on two workstations.","Hard disks of affected workstations permanently removed; files restored from prior evening's backup.","Network fully operational by May 1, 2023; all passwords changed and user accounts audited.","VPN access disabled pending implementation of multi-factor authentication for network and workstations.","Company reviewing improved cyber threat protection software and hardware solutions."],"urls":{"canonical":"https://secwatch.observer/filing/0001537435-23-000036","json":"https://secwatch.observer/filing/0001537435-23-000036.json","markdown":"https://secwatch.observer/filing/0001537435-23-000036.md","text":"https://secwatch.observer/filing/0001537435-23-000036.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1537435/000153743523000036/0001537435-23-000036-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1537435/000153743523000036/tgen-20230503.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T01:03:04.769416+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}