I saw a movie and idk what language it was in but the vague recollection I have is the plot as follows:

a group of female friends go to a gig, I don't recall the genre of the band but metal or rock something grungy at least
they're invited home with the band to a pretty secluded area so they felt quite isolated
they go in with the band and there's a bunch of people doing drugs, not sure if it's heroin or something else that spooks the camera person but they don't have an escape
the friend(s) are fine with trying the drug(s) but the camera person isn't
I don't remember the rest but I think at some point the cameraperson wants to escape and they uncover some degree of satanic or occult ritual going on in the house but I don't remember the ending

I know it's a long shot but I think it might have been Romanian or polish but I can't remember much of it

I'm pretty sure it was filmed like a found footage movie though and the filming was similar to that in As Above So Below