alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Request To Malicious Image Hosted on Archive .org"; flow:established,to_server; http.uri; content:"MSI_PRO"; pcre:"/\x2e(?:png|jpg|jpeg|svg|gif|tiff)$/i"; http.header_names; content:!"|0d 0a|user-agent|0d 0a|"; nocase; content:!"|0d 0a|referer|0d 0a|"; nocase; http.host; content:"archive.org"; endswith; fast_pattern; classtype:trojan-activity; sid:2065098; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_10_08, deployment Perimeter, deployment SSLDecrypt, malware_family ReverseLoader, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer; target:src_ip;)