So it took me a while to find this, but here you go, top botnet sources:
github.com
GitHub - R00tS3c/DDOS-RootSec: DDOS Archive by RootSec (Scanners, BotNets (Mirai and QBot Premium & Normal and more), Exploits, Methods, Sniffers)
DDOS Archive by RootSec (Scanners, BotNets (Mirai and QBot Premium & Normal and more), Exploits, Methods, Sniffers) - GitHub - R00tS3c/DDOS-RootSec: DDOS Archive by RootSec (Scanners, BotNets...