alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Agent.ACBD CnC Activity"; flow:established,to_server; http.method; content:"POST"; http.content_len; bsize:3; content:"364"; http.request_body; content:"OE1utcJ1hOpXDXMMv7v6fEB0TE58D8zB2PFvgXLL"; startswith; reference:md5,26382278c3d185d750203d6a600f8ae9; classtype:command-and-control; sid:2030727; rev:1; metadata:attack_target Client_Endpoint, created_at 2020_08_24, deployment Perimeter, malware_family Win32_Agent_ACBD, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_24;)