alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Smokeloader Activity (POST)"; flow:established,to_server; urilen:<15; http.method; content:"POST"; http.header_names; content:"|0d 0a|Connection|0d 0a|"; content:"Content-Type|0d 0a|Accept|0d 0a|Referer|0d 0a|User-Agent|0d 0a|Content-Length|0d 0a|Host|0d 0a 0d 0a|"; distance:0; fast_pattern; http.referer; pcre:"/^http|3a 2f 2f|[a-z]{5,16}.(com|org|net|de)\/$/"; http.content_type; content:"application/x-www-form-urlencoded"; bsize:33; reference:md5,d58078226c4066f05926c70be7cf64a7; classtype:trojan-activity; sid:2039103; rev:4; metadata:attack_target Client_Endpoint, created_at 2022_10_06, deployment Perimeter, deprecation_reason False_Positive, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_18, reviewed_at 2024_03_04; target:src_ip;)