alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Powershell Octopus Backdoor Activity (POST)";
flow:established,to_server;
http.request_line;
content:"POST /publish HTTP/1.1"; fast_pattern;
http.header_names;
content:!"Referer";
http.request_body;
content:"token="; startswith;
content:"&Category="; distance:0;
reference:url,app.any.run/tasks/0c991e38-b571-435c-a34b-281b2c9df1ef/;
classtype:trojan-activity;
sid:2034939; rev:1;
metadata:attack_target Client_Endpoint, created_at 2022_01_19, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_19;
)