alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Blackmagic Ransomware Checkin Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api/public/api/test?ip="; fast_pattern; startswith; content:"-&status="; distance:0; content:"&cnt="; distance:0; content:"&type="; distance:0; content:"&num="; distance:0; http.header_names; content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a 0d 0a|"; bsize:26; reference:md5,bf647a66de004ae56ece7f18a8dfa0ed; reference:md5,7b1fd05e9db5369c5b7ef82080fd0ca8; reference:url,twitter.com/siri_urz/status/1597952384709558272; classtype:trojan-activity; sid:2041453; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_12_01, deployment Perimeter, malware_family BlackMagic, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_01, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact; target:src_ip;)