alert http $HOME_NET any -> $EXTERNAL_NET [7080,8080,443] (msg:"ET MALWARE W32.Geodo/Emotet Checkin"; flow:established,to_server; urilen:1; flowbits:set,ETPRO.Emotet; http.method; content:"GET"; http.user_agent; bsize:76; content:"Mozilla|2f|5|2e|0|20 28|compatible|3b 20|MSIE|20|8|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|SLCC1|3b 20 2e|NET|20|CLR|20|1|2e|1|2e|4322|29|"; fast_pattern; startswith; http.cookie; pcre:"/[a-z0-9]{3,4}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})+$/i"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Accept"; content:"|0d 0a|Cookie|0d 0a|"; startswith; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|"; reference:md5,dacdcd451204265ad6f44ef99db1f371; classtype:command-and-control; sid:2024272; rev:7; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_01, deployment Perimeter, malware_family Geodo, malware_family Emotet, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_03_11;)