On April 24, 2019, Fxmsp claimed to have accessed three leading antivirus companies' internal networks. 

Fxmsp extracted sensitive source code from antivirus software, AI, and security plugins belonging to the three companies. Fxmsp also commented on the capabilities of the different companies’ software and assessed their efficiency.

Fxmsp is a hacking collective that has operated in various top-tier Russian- and English-speaking underground communities since 2017. They are known for targeting corporate and government networks worldwide.