alert http $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE [ANY.RUN] RadX RAT Keep-Alive Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/check/-"; fast_pattern; startswith; http.content_len; byte_test:0,=,0,0,string,dec; http.header_names; content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a 0d 0a|"; startswith; threshold:type both,track by_src, count 5, seconds 20; reference:md5,f0bc8d8a0ecd2ff441c9a24f907bd9db; reference:url,app.any.run/tasks/4fdde064-e353-4325-81ef-d85b22ee0f90; classtype:trojan-activity; sid:2050420; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_01_24, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_24; target:src_ip;)