Identify hash

Hello everyone,

I'm having some troubles to identify an hash that follows this pattern (I redacted it as requested by the rules):
It seems that is made by A-z0-9 chars, plus the / one, it has a fixed length of 88 chars and it always end with ==
The position of the / seems random, so there's no separation between the salt and the "real" hash.

I'm 100% sure it's an hashed password, I checked my cheat sheet with known password but I can't identify it.
Do you have any clues?