Reuters:

A single activist helped turn the tide against NSO Group, one of the world’s most sophisticated spyware companies now facing a cascade of legal action and scrutiny in Washington over damaging new allegations that its software was used to hack government officials and dissidents around the world.

It all started with a software glitch on her iPhone.

And:

A mysterious fake image file within her phone, mistakenly left behind by the spyware, tipped off security researchers.

Interesting read. Were it not for that mysterious fake image, we still might not know about this.