alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Alphacrypt/TeslaCrypt Ransomware CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.header; content:!"driftmania"; http.user_agent; content:"Mozilla"; startswith; http.host; content:!"coreftp.com"; http.request_body; content:"data="; startswith; fast_pattern; pcre:"/^[A-F0-9]{100,}$/R"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,a3440b6117f3783989683753c9f394dd; classtype:command-and-control; sid:2022504; rev:10; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_02_11, deployment Perimeter, malware_family Ransomware, malware_family Alphacrypt, malware_family TeslaCrypt, signature_severity Major, tag Ransomware, tag c2, updated_at 2024_05_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)