Malware "fast16" that makes people believe "the experiment failed" to disrupt Iran's nuclear weapons tests

Researchers found that the fast16 malware was designed to tamper with nuclear blast simulation data, making pressure readings look slightly lower and causing the run to appear to fail.

The analysis suggests fast16 was likely aimed at Iran’s nuclear weapons program and may have been created around 2005.

The case shows that state-backed cyber operations may have targeted not real-world systems, but the simulation tools used to judge nuclear design progress.

It also indicates that highly advanced sabotage techniques existed before Stuxnet became widely known.