alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Emotet Style Request Activity (GET)"; flow:established,to_server; http.request_line; content:"GET / HTTP/1.1"; http.header_names; content:"|0d 0a|Connection|0d 0a|Cookie|0d 0a|Host|0d 0a 0d 0a|"; bsize:30; fast_pattern; http.host; pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/"; reference:md5,51b92609a92c5061ce7fb88193ee0f02; reference:md5,1f222a6957893015858f602024096910; reference:url,twitter.com/Cryptolaemus1/status/1587792659275448320; classtype:trojan-activity; sid:2039624; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_11_03, deployment Perimeter, deployment SSLDecrypt, malware_family Emotet, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_03; target:src_ip;)