alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Blacklegion Ransomware CnC Response"; flow:established,to_client; http.response_body; content:"|22|first|5f|name|22 3a 22|Blacklegion|22 2c 22|username|22 3a 22|blacklegion|5f|support"; fast_pattern; content:"|22|text|22 3a 22|Unique|20|ID|3a|"; content:"Personal|20|ID|3a|"; reference:md5,9e37d89756eee8d24edecde880c2711a; reference:url,twitter.com/suyog41/status/1736713012747419681; classtype:trojan-activity; sid:2049719; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_18, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Blacklegion, performance_impact Significant, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_18;)