alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MyKings Bootloader Variant Requesting Payload M1"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/ok/down.html"; startswith; fast_pattern; endswith; http.accept; content:"*/*"; startswith; endswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|user-agent|0d 0a|"; content:!"cache"; content:!"|0d 0a|accept-"; reference:url,blog.trendmicro.com/trendlabs-security-intelligence/uncovering-a-mykings-variant-with-bootloader-persistence-via-managed-detection-and-response/; classtype:trojan-activity; sid:2027900; rev:4; metadata:created_at 2019_08_21, malware_family Mirai, malware_family MyKings, confidence High, signature_severity Major, updated_at 2024_04_21;)