NetWalker ransomware samples/source

Does anyone know when I could get my hands on a sample of netwalker ransomware. Pardon my ignorance but I do not know where to find samples online.

EDIT: since someone asked, I am doing a writeup on fileless powershell malware and I saw someone mention netwalker as a pretty notorious one. I would prefer wild samples so I can deobfuscate them myself as it will give more content but just the source code is cool as well

malware netwalker ransomware