alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious GET Request (Likely Pentester CnC)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/pentest-macro?computer=c_"; fast_pattern; reference:md5,f7ddcef3607b41c593284dde397e35b8; classtype:command-and-control; sid:2034637; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_08, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_03;)