giao thuc ftp chay tren cong 21 hoac 23 ban thu dong cong nay vao xem sao ban khong su dung netstat -ano xem ket noi toi may chu cua web kia o cong nao
neu muon persistence ban can co vps ngoai ra ban khong len su dung cobalstrike de cai backdoor rat de phat hien toi khuyen ban nen su dung cac cong cu cai backdoor vao ram nhu koadic
