alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ConPtyShell Client Response"; flow:established,to_server; content:"|1b 5b 32 4a 1b 5b 6d 1b 5b 48 1b 5b 48 1b 5d 30 3b|"; startswith; fast_pattern; content:"|5b 32 33 58 1b 5b 32 33|"; distance:0; content:"|43 0d 0a 1b 5b 38 30 58 1b 5b 38 30 43 0d 0a 1b|"; distance:0; reference:url,github.com/antonioCoco/ConPtyShell; classtype:command-and-control; sid:2035565; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_23, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_14;)