alert ip $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SHELLCODE Execve(/bin/sh) Shellcode"; content:"|31 c0 50 68 2f 2f 73 68 68 2f 62 69 6e 89 e3 50 53 89 e1 b0 0b cd 80|"; classtype:shellcode-detect; sid:2025695; rev:1; metadata:affected_product Linux, attack_target Server, created_at 2018_07_13, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_07_26;)