alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MASSLOGGER Client Data Exfil (POST)"; flow:established,to_server; content:".zip|22 0d 0a|Content-Type: application/zip|0d 0a 0d 0a|PK"; http.method; content:"POST"; http.uri; content:".php"; endswith; http.content_type; content:"multipart/form-data|3b| boundary=---------------------"; depth:51; http.request_body; content:"Content-Disposition|3a| form-data|3b| name=|22|file|22 3b 20|"; fast_pattern; content:"Log.txt"; content:"PK"; reference:md5,8a1ba030a3bcfde60ad2e067fec8b773; classtype:trojan-activity; sid:2030154; rev:2; metadata:attack_target Client_Endpoint, created_at 2020_05_11, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_23;)