alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET HUNTING Suspicious User-Agent String Observed (IOT)"; flow:established,to_server; http.user_agent; bsize:3; content:"iot"; nocase; fast_pattern; reference:url,blog.sekoia.io/a-glimpse-into-the-quad7-operators-next-moves-and-associated-botnets/; classtype:trojan-activity; sid:2064289; rev:1; metadata:affected_product IoT, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_09_04, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_09_04; target:src_ip;)