Ukrainian “white hacker” Nikita Knysh posted on his Facebook page that a group of Ukrainian “mommy hackers” had disabled the Russian GLONASS radio navigation satellite system.
Study, read, and learn from others, and do not shy away from your own…
HackYouMom 
he wrote and attached copies of documents about the system.
Video of Mykyta Knysh’s lecture on cybersecurity for the InfoLight.UA project:
