alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Gh0stRat C2 Response (X11 SelectionNotify)"; flow:established,to_client; content:"|1f 00 00 00 31 00 32 00 33 00 34 00 35 00 36 00 00 00|"; startswith; fast_pattern; content:"|78 9c|"; distance:4; within:2; reference:url,twitter.com/naumovax/status/1703765086014152778; classtype:command-and-control; sid:2048129; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_09_20, deployment Perimeter, malware_family Win32_Gh0stRat, confidence High, signature_severity Critical, tag c2, updated_at 2023_09_27, reviewed_at 2023_09_20;)