One week after WannaCry's attack, the analysis of the data collected shows that the most malicious software was Windows 7 and not Windows XP, according to Kaspersky security firm.
Specifically, over the 60% + 31% of the computers hit by WannaCry ran 64 or 32 bits (respectively) of the Windows 7 operating system.
Ironically, Windows 7 was supposed to be secure against WannaCry, as Microsoft had released patches security since March 2017. Also we must not forget that the operating system it is supposed to still be supported.
On the other hand, seeing Windows 7 as the most influenced operating system by WannaCry malware shows it makes sense. Because if you think it's the world's top PC operating system with a market share of almost 50% it seems to be the right percentage.
This means that almost 1 on 2 desktop systems run with Window 7.
It is also worth mentioning that Windows 7 is released in pirated versions copies in too many systems out there, especially in countries like the China and Russia, which are still using non-genuine copies of the operating system.
This has the effect of not being able to update them every month, while many users have completely blocked updates to avoid checking for genuine product keys.
Note that Windows 7 will continue to be supported by January of 2020, so genuine systems with this operating system will still receive updates for almost 3 years.
