alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FAKBEN Ransomware"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?btc="; nocase; fast_pattern; content:"&wid="; nocase; distance:0; content:"|3a|TWljcm9zb2Z0IFdpbmR"; distance:0; http.header_names; content:!"Accept"; content:!"Referer|0d 0a|"; content:!"User-Agent|0d 0a|"; reference:md5,c952a88edc0766adf819b30cd2683ac7; classtype:trojan-activity; sid:2022283; rev:2; metadata:attack_target Client_Endpoint, created_at 2015_12_18, deployment Perimeter, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_10, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)