alert tcp $HOME_NET any -> $EXTERNAL_NET [25,2525,587] (msg:"ET MALWARE Executioner Ransomware Reporting Infection via SMTP"; flow:established,to_server; dsize:<40; content:"DECRYPT CODE|20 3a 20 20 20 20 20 20 20|"; fast_pattern; depth:21; reference:md5,eec4f84d12139add6d6ebf3b8c72fff7; classtype:trojan-activity; sid:2024351; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_06_06, deployment Perimeter, malware_family Ransomware, malware_family Executioner, confidence Medium, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)