Russian forum for finding your question right answer, but without registration, user can not contribute in RuDark community. But the general thread can be read by anyone, and some mazor thread categories are document, hacking, finance, power action and etc.
LINK: http://rudarkznow3mhg6kdbwvvpkzsupjfgrt6id5hae53fdm5iikf77t4pid.onion
To access any onion link, you need to use the Tor browser