alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Nuke Ransomware Checkin"; flow:to_server,established; http.method; content:"POST"; http.uri; content:".php"; endswith; http.header; content:"Expect|3a 20|100-continue"; http.request_body; content:"machine="; depth:8; fast_pattern; pcre:"/^machine=[^&]+$/Pi"; http.content_type; content:"application/x-www-form-urlencoded"; startswith; http.header_names; content:!"User-Agent|0d 0a|"; reference:url,www.spyware-techie.com/nuke-ransomware-removal-guide; reference:md5,ff0e42146794f0d080df0467337b2d01; classtype:command-and-control; sid:2023335; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_10_12, deployment Perimeter, malware_family Ransomware, malware_family Nuke, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_05, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)