It's PWN but in OSINT hmm...
Googled something like `"get-access" + ctf`and found writeup for [DefCampCTF](https://nytr0gen.github.io/writeups/ctf/2019/09/09/defcamp-ctf-quals-2019.html#get-access-101p-pwnrev). Flag from writeup is flag for task: `DCTF{BD8C664E74EB942225EFB74CFD76EC4B2FDA0C37A2D567B707AA1407781FF77F}`