alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SLOTHFULMEDIA RAT CnC (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/v?m="; startswith; fast_pattern; content:"&i="; distance:0; http.accept; content:"application/octet-stream,application/xhtml"; bsize:42; reference:url,us-cert.cisa.gov/ncas/analysis-reports/ar20-275a; reference:md5,448838b2a60484ee78c2198f2c0c9c85; classtype:command-and-control; sid:2030960; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_10_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_01;)