Its very weird that they first send it to the media and then upload it on indymedia. That is very unusual because its just not a good idea.
Also it was published by a group most likely not active anymore. Vulkangruppe was last mentioned in the yearly report of the state protection I think 2019. Also they didnt do any social media work. That could mean nothing but it is very out of character.
It might just be a false flag.
That happended before and apperantly it was russia but i dont belive that for a second. i think it is a false flag of the BND acting out a "false flag from russia". Thats all conspiracy theory now though.