There is no evidence that Profexer worked, at least knowingly, for Russia’s intelligence services, but his malware apparently did.
That a hacking operation that Washington is convinced was orchestrated by Moscow would obtain malware from a source in Ukraine — perhaps the Kremlin’s most bitter enemy — sheds considerable light on the Russian security services’ modus operandi in what Western intelligence agencies say is their clandestine cyberwar against the United States and Europe:
http://link.coffee/ukrainianhackerprofexer