alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Jasper URI Path Observed M4"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/"; startswith; content:"/mx_jscript.php"; distance:3; within:15; endswith; fast_pattern; reference:url,twitter.com/c_APT_ure/status/1458388621317246977; classtype:command-and-control; sid:2034428; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_11_11, deployment Perimeter, deployment SSLDecrypt, malware_family JasperLoader, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_11;)