One of the most dangerous malicious insider activities that were ever formed was the
Stuxnet computer virus. In June 2010 when an operations group of 5 individuals from a
software security firm discovered Stuxnet, it was the biggest uncovering of a 500-
kilobyte computer worm that infected the software of at least 14 industrial sites in Iran
Typically, a virus works by inserting or connecting itself to a legitimate program or
document that supports macros to execute its code. This virus Stuxnet was a masterful
and malicious piece of code that attacked in three phases. First, it targeted Microsoft
Windows machines and networks, repeatedly replicating itself. Then it sought out
Siemens Step7 software, which is also Windows-based and used to program industrial
