alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Spyder CnC Checkin"; flow:established,to_server; flowbits:set,ET.Spyder2023.1; flowbits:noalert; http.header_names; to_lowercase; content:!"|0d 0a|connection|0d 0a|"; http.method; content:"POST"; http.uri; content:".php"; endswith; http.request_body; content:"data="; fast_pattern; startswith; base64_decode:offset 0,relative; base64_data; content:"|7b 22|hwid|22 3a 22|"; startswith; classtype:command-and-control; sid:2049698; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_15, deployment Perimeter, malware_family Spyder, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)