alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE CryptoPatronum Ransomware CnC Checkin";
flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.request_body;
content:"id="; startswith;
content:"&username="; distance:0;
content:"&pname="; distance:0;
content:"&kid="; distance:0; fast_pattern;
content:"&ppath="; distance:0;
http.header_names;
content:!"Referer";
content:!"User-Agent";
reference:md5,429ba4a470eb2f3c0ce6678745bc8d8e;
classtype:command-and-control;
sid:2029349; rev:1;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_04, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_04, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)