alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT Related CR4T Backdoor Activity"; flow:established,to_server; http.user_agent; content:"TroubleShooter"; fast_pattern; bsize:14; reference:url,securelist.com/dunequixote/112425/; classtype:trojan-activity; sid:2052235; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, created_at 2024_04_23, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_23; target:src_ip;)