What kind of a payload
CONNECT [host_port] HTTP/1.1
Host: [host_port]
Proxy-Connection: keep-alive
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Linux; Android 9; Redmi Note 9 Pro Build/QKQ1.191215.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/93.0.4577.62 Mobile...