alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Dalexis CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; http.request_body; content:"name=|22|uploaded|22 3b 20|filename=|22|"; fast_pattern; content:".jpg"; http.content_type; content:"multipart/form-data|3b 20|boundary="; startswith; http.header_names; content:!"Referer|0d 0a|"; content:!"|0d 0a|Accept"; nocase; classtype:command-and-control; sid:2020933; rev:5; metadata:attack_target Client_Endpoint, created_at 2015_04_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_30, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)