https://www.otsecurityletter.com/ 2026-05-19 https://www.otsecurityletter.com/archive 2025-11-05 https://www.otsecurityletter.com/subscribe 2025-11-05 https://www.otsecurityletter.com/authors 2026-05-21 https://www.otsecurityletter.com/authors/jake-nathan 2025-11-07 https://www.otsecurityletter.com/p/may-14-ransomware-reconsolidates-around-qilin-lockbit-5-0-and-the-gentlemen 2026-05-19 OT Security Letter en 2026-05-19T15:14:14Z May 14 - Ransomware reconsolidates around Qilin, LockBit 5.0, and "The Gentlemen"