alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Powershell Empire Activity M1"; flow:established,to_server; urilen:18; http.uri; content:"/login/process.php"; fast_pattern; http.header_names; content:!"|0d 0a|referer|0d 0a|"; nocase; content:!"|0d 0a|accept|0d 0a|"; nocase; content:"|0d 0a|cookie|0d 0a|user-agent|0d 0a|"; startswith; nocase; reference:url,github.com/EmpireProject/Empire; classtype:trojan-activity; sid:2053781; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_06_20, deployment Perimeter, malware_family Empire, confidence Medium, signature_severity Major, tag c2, updated_at 2024_06_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)