alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NORTHSTAR Client Data POST"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:13; content:"/getjuice.php"; fast_pattern; http.content_type; content:"multipart/form-data|3b| boundary=---------------------"; startswith; http.header; header_lowercase; content:"|0d 0a|expect|3a 20|100-continue|0d 0a|"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|user-agent|0d 0a|"; reference:url,github.com/EnginDemirbilek/NorthStarC2/; classtype:trojan-activity; sid:2030189; rev:3; metadata:attack_target Client_Endpoint, created_at 2020_05_19, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_29;)