alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Emotet.C Variant Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/download.php?listfiles="; http.content_len; byte_test:0,=,0,0,string,dec; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|accept"; reference:md5,cd74438c04b09baa5c32ad0e5a0306e7; classtype:command-and-control; sid:2020157; rev:6; metadata:created_at 2015_01_08, malware_family Win32_Emotet_C, signature_severity Major, updated_at 2024_04_28;)