Vidence? I presume you mean "evidence"?
Depends on how credible the evidence is. If the source code has comments in Russian, the ransom notes are in Russian and English, the servers are tracked back to Russia, then that's fairly strong evidence.
Or if the broken English demonstrates typical mistakes a Russian speaker would make in translating Russian to English, then that's also quite strong evidence.
If you don't know what eschatology is then don't worry; it's not the end of the world.
I wanted to go to France and my wife wanted to go to Spain. So we compromised and went to Spain.
The sooner you start out on the road to nowhere, the sooner you'll get there.
Please do not send uninvited PMs requesting support; post into the appropriate forum instead and we'll all learn. See our Private messaging policy.