alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE DefendNot Installer Script Inbound"; flow:established,to_client; http.response_body; content:"|24|InstallPath|20 3d 20 22 24|env|3a|ProgramFiles|5c|defendnot|22|"; fast_pattern; content:"|24|InstallPath|5c|defendnot|2d|loader|2e|exe"; classtype:trojan-activity; sid:2068059; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_03_06, deployment Perimeter, deployment SSLDecrypt, malware_family DefendNot, confidence High, signature_severity Major, updated_at 2026_03_06, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer; target:dest_ip;)