alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Arid Viper APT Related Activity (POST)"; flow:established,to_server; urilen:40<>60; http.method; content:"POST"; http.uri; content:!".php"; content:!".htm"; content:!".asp"; http.header_names; content:"|0d 0a|Host|0d 0a|Accept|0d 0a|Content-Length|0d 0a|Content-Type|0d 0a 0d 0a|"; bsize:48; http.content_type; content:"multipart/form-data|3b 20|boundary="; startswith; http.request_body; content:"|0d 0a|V2luZG93cy"; fast_pattern; reference:md5,be1217071f0a3f4c552b56dff96dc11c; reference:url,twitter.com/Jup1a/status/1579751269828562945; classtype:trojan-activity; sid:2039171; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_10_12, deployment Perimeter, deployment SSLDecrypt, malware_family AridViper, malware_family TA401, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_12;)