alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Neptune Loader Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri.raw; content:"|2f 2f 2f 2f 2f 2f 2f 2f 2f 2f 2f 2f|"; startswith; fast_pattern; content:"|2f 2f 2f|tasks.php?bid="; distance:10; http.user_agent; content:"|2f 2f|"; bsize:2; http.header_names; content:!"Referer"; content:!"Accept"; reference:md5,b419a6ad40e2e123727dabfda97e29f5; reference:url,tufan-gungor.github.io/posts/neptune-loader-analysis/; classtype:trojan-activity; sid:2050109; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_01_17, deployment Perimeter, malware_family Win32_Neptune, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_17; target:src_ip;)