alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Jaff Ransomware Checkin"; flow:established,to_server; http.method; content:"GET"; http.host; content:"fkksjobnn43.org"; fast_pattern; http.header_names; content:"|0d 0a|Host|0d 0a 0d 0a|"; endswith; reference:url,blogs.forcepoint.com/security-labs/jaff-enters-ransomware-scene-locky-style; reference:md5,942c6a039724ed5326c3c247bfce3461; classtype:command-and-control; sid:2024288; rev:7; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_05_11, deployment Perimeter, malware_family Jaff_Ransomware, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_06, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)