Cryptanalysis

I have done hours of research to know everything about hashes... I tried to use ******** to crack the NT-Hash (app to crack hashes).
I used both tables and brute force...
The result was : Not found
Please if you know what I did wrong tell me
Thanks

I blacked-off the name of the app so it doesn’t give any major clue to anybody

Hello,

Je t’invite à lire le sous titre du challenge pour avoir un indice :)