alert tcp any any -> $HOME_NET 2404 (msg:"ET SCADA IEC-104 Station Interrogation - Global ASDU Broadcast"; flow:established,to_server; content:"|68|"; startswith; content:"|64|"; distance:0; content:"|ff ff 00 00 00 14|"; fast_pattern; distance:3; reference:url,icsdefense.net/pcap; reference:url,github.com/automayt/ICS-pcap/tree/master/IEC 60870/iec104; classtype:protocol-command-decode; sid:2046164; rev:1; metadata:affected_product IoT, attack_target IoT, created_at 2023_06_06, deployment Perimeter, deployment Internal, deployment Datacenter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_07; target:dest_ip;)