alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible DACLS RAT CnC (Log Check)"; flow:established,to_server; content:"|0d 0a 0d 0a|log=check"; fast_pattern; isdataat:!1,relative; http.method; content:"POST"; http.content_len; content:"9"; bsize:1; http.protocol; content:"HTTP/1.0"; http.user_agent; content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win64|3b 20|x64)"; depth:41; reference:url,blog.netlab.360.com/dacls-the-dual-platform-rat-en/; classtype:command-and-control; sid:2029856; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_04_10, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_10;)