alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Crimson RAT CnC Activity (Inbound) M2"; flow:established,to_client; dsize:<30; content:"|00 00 00 00 63 6c 79|"; offset:1; depth:7; fast_pattern; content:"="; distance:8; within:1; reference:url,x.com/naumovax/status/1818646536600822231; reference:md5,f5380e7a6e15a0ef27e6f31fcc29ed4d; classtype:trojan-activity; sid:2054809; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_07_31, deployment Perimeter, malware_family CrimsonRAT, confidence High, signature_severity Critical, updated_at 2024_07_31;)