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sentinelone.com · high

Weekly CTI roundup: Ryuk access broker sentenced, TraderTraitor FLATROOF/ROOFDECK macOS backdoors, AI-agent skimming of 600K cards

This SentinelOne weekly roundup (Week 39, 2026) covers one law enforcement success and two active threat campaigns. A US court sentenced Armenian national Karen Serobovich Vardanyan ("Maneeken"/"Karl Lagerfeld"), an initial access specialist for Ryuk ransomware, to two years in prison and over $1.2 million in restitution. SentinelLABS ide…

sentinelone.com · medium

BYOVD trust gap: Windows kernel still loads revoked-certificate drivers; ~36% of LOLDrivers samples absent from default blocklist

SentinelOne analysis argues that bring your own vulnerable driver (BYOVD) succeeds because of a signing-trust gap rather than an incomplete driver list. The Windows kernel loads drivers signed with expired or revoked certificates, and a 2026 intrusion reported by Help Net Security used a decade-old forensic driver whose certificate had lo…

sentinelone.com · medium

BYOVD and EDR-Killer Hunting: Four Distinct Techniques Detection Teams Should Cover Separately Before Ransomware Deployment

SentinelOne argues that "EDR killer" covers four different techniques, and a single driver-load rule leaves blind spots. The four are bring-your-own-vulnerable-driver (BYOVD), bring-your-own-installer, admin-to-kernel, and driverless suspension. The article gives hunt logic for each and recommends rolling them out in order of signal quali…

sentinelone.com · critical

Weekly CTI roundup: ShinyHunters-linked arrest, DPRK laptop farms raided, Ledger supply-chain implants, French refrigeration sabotage

This SentinelOne weekly roundup covers three developments. The FBI arrested Edward Dubrovsky, a former CYPFER executive, on conspiracy and extortion charges. Kash Patel described him as a suspected co-conspirator of ShinyHunters, though he has not been officially named as one. The FBI says the group breached more than 140 organizations an…

sentinelone.com · high

BYOVD EDR-killer tooling industrialized into a shared supply chain used by rival ransomware crews and RaaS affiliates

This SentinelOne analysis argues that EDR killing, mostly through bring your own vulnerable driver (BYOVD), has grown from one-off tooling into a maintained, shared and sold capability. Ransomware actors disabled security tools in about 48% of 2024 intrusions, and BYOVD is the fastest-growing method within that figure. The article traces …