Bypass Record
BYOVD (Vulnerable Driver) × SentinelOne Singularity
A publicly-reported instance of BYOVD (Vulnerable Driver) bypassing SentinelOne Singularity, recorded with its original source. Factual record; no assessment of any specific deployment.
Mechanism
HeartCrypt is delivered via droppers or trojanized utilities. It decodes and launches an obfuscated binary that loads a vulnerable signed driver (BYOVD) impersonating trusted security software (e.g., CrowdStrike Falcon). The kernel driver then terminates EDR/AV processes, disabling endpoint defenses. Multi-stage packing and resource encryption evade detection.
Detection & mitigation
Monitor for mass termination of security processes and services; alert on loading of drivers with revoked, expired, or untrusted certificates, especially those impersonating known security vendors. Enforce strict driver-signing policies and application allowlisting to block unauthorized binaries.
This is a record of a publicly-reported event, not an assessment of any specific organization's deployment. Detection and mitigation notes are drawn from the cited source. Where the source is silent, fields are omitted.