alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Thanatos Ransomware Variant Pico User-Agent"; flow:established,to_server; http.user_agent; content:"Mozilla/5.0 (Windows NT 6.1) Pico/"; startswith; classtype:trojan-activity; sid:2029306; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_22, deployment Perimeter, deprecation_reason Age, malware_family Ransomware, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_27, reviewed_at 2023_12_27, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)