alert udp $HOME_NET any -> $EXTERNAL_NET [6892,6893] (msg:"ET MALWARE Ransomware/Cerber Checkin M3 (16)"; dsize:13<>32; content:"f"; nocase; depth:1; pcre:"/^[a-f0-9]{13,30}$/Ri"; threshold:type both, track by_src, count 1, seconds 60; reference:md5,42c677d6d8f42acd8736c4b8c75ce505; reference:md5,7f6290c02465625828cfce6a8014c34a; reference:md5,d8b2d2a5f6da2872e147011d2ea85d71; classtype:command-and-control; sid:2023627; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_12, deployment Perimeter, malware_family Ransomware_Cerber, confidence High, signature_severity Major, tag Ransomware, tag Ransomware_Cerber, updated_at 2024_07_02, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)