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  "path": "/blog/archives/2026/04/fast16-malware.html",
  "publishedAt": "2026-04-30T10:22:02.000Z",
  "site": "https://www.schneier.com",
  "tags": [
    "Uncategorized",
    "cybersecurity",
    "hacking",
    "Iran",
    "malware",
    "reverse engineering",
    "deployed"
  ],
  "textContent": "Researchers have reverse-engineered a piece of malware named Fast16. It’s almost certainly state-sponsored, probably US in origin, and was deployed against Iran years before Stuxnet:\n\n> “…the Fast16 malware was designed to carry out the most subtle form of sabotage ever seen in an in-the-wild malware tool: By automatically spreading across networks and then silently manipulating computation processes in certain software applications that perform high-precision mathematical calculations and simulate physical phenomena, Fast16 can alter the results of those programs to cause failures that range from faulty research results to catastrophic damage to real-world equipment.”...",
  "title": "Fast16 Malware"
}