alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/0xtaRAT CnC Activity M2 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2e|php|3f|GUID|3d|"; fast_pattern; pcre:"/^(?P<guid>[a-z0-9]{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{12})(?P=guid)?\&/R"; content:"SYS="; distance:0; content:"|7c|"; content:"|7c|"; distance:0; reference:url,research.checkpoint.com/2023/operation-silent-watch-desktop-surveillance-in-azerbaijan-and-armenia; classtype:trojan-activity; sid:2044291; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_02_21, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_0xtaRAT, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_08, reviewed_at 2024_01_26; target:src_ip;)