alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Earth Preta PUBLOAD Activity M1"; flow:established,to_server; urilen:1; http.method; content:"POST"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; http.request_body; content:"|17 03 03|"; startswith; fast_pattern; byte_jump:2,0,relative,post_offset -1; isdataat:!2,relative; reference:url,www.trendmicro.com/en_us/research/23/c/earth-preta-updated-stealthy-strategies.html; reference:url,url,www.trendmicro.com/en_us/research/22/k/earth-preta-spear-phishing-governments-worldwide.html; classtype:trojan-activity; sid:2047019; rev:3; metadata:attack_target Client_Endpoint, created_at 2023_08_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_04_27, reviewed_at 2024_03_29; target:src_ip;)