alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Fodcha Bot CnC Client Heartbeat"; flow:established,to_client; dsize:5; content:"|69 00 00 96 ff|"; fast_pattern; reference:url,blog.netlab.360.com/fodcha-a-new-ddos-botnet/; classtype:command-and-control; sid:2035940; rev:2; metadata:attack_target IoT, created_at 2022_04_13, deployment Perimeter, malware_family Fodcha, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_14;)