alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/7ev3n Ransomware Initial Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?RIGHTS="; fast_pattern; nocase; content:"&WIN="; distance:0; nocase; http.user_agent; content:"Internet Explorer"; bsize:17; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; reference:md5,9f8bc96c96d43ecb69f883388d228754; classtype:command-and-control; sid:2022402; rev:3; metadata:attack_target Client_Endpoint, created_at 2016_01_22, deployment Perimeter, malware_family Win32_7ev3n, signature_severity Major, tag Ransomware, updated_at 2020_06_17, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)