alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Allasenha/CarnavalHeist RAT CnC Checkin"; flow:established,to_server; content:"|3c 7c|Info|7c 3e|"; startswith; content:"|3c 7c 3e|Windows "; fast_pattern; within:150; content:"|3c 7c 3e 3c 3c 7c|"; endswith; reference:url,harfanglab.io/en/insidethelab/allasenha-allakore-variant-azure-c2-steal-banking-latin-america/; reference:url,blog.talosintelligence.com/new-banking-trojan-carnavalheist-targets-brazil/; classtype:trojan-activity; sid:2053207; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_05_31, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_31; target:src_ip;)