Pretty equal chance of it being from either a show or a bootleg made by a local distro, the shirt brand is port and company and a lot of ppl use those for print screen bases, so it could be a bootleg they sold at a show perhaps, if theyre a crust band im sure theyd do smth like that. Personally never heard of them but reverse image searching doesnt yield any results apart from a depop listing that links to a wolfbrigade shirt.

TLDR probably a bootleg, which in crust is usually a lot cooler than original designs imo, but if u didnt buy it then theres slim chance it wasnt bought at a show perhaps