alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Possible IoT_reaper ELF Binary Download"; flow:established,from_server; flowbits:isset,ET.iotreaper; file_data; content:"|7f 45 4c 46|"; depth:4; reference:url,blog.netlab.360.com/iot_reaper-a-rappid-spreading-new-iot-botnet-en/; classtype:trojan-activity; sid:2024929; rev:1; metadata:attack_target IoT, created_at 2017_10_25, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)