alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA401 Arid Viper Related Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:57; pcre:"/^\/[a-z0-9]{16}\//i"; http.request_body; content:"pcUHJvZ3JhbURhdG"; fast_pattern; classtype:trojan-activity; sid:2036928; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_07, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_07;)