Fast16: Pre-Stuxnet malware that targeted precision engineering software

Fast16 is a 2005 sabotage malware analyzed by SentinelOne that used an embedded Lua virtual machine, a wormable modular loader (svcmgmt.exe), and a kernel driver (fast16.sys) to intercept filesystem operations and apply rule-based floating-point patches to precision engineering and simulation software; the report attributes the tooling to early U.S. cyber operations and highlights its strategic goal of silently corrupting scientific and engineering outputs rather than simple espionage.