alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE GhostRat CnC Checkin"; flow:established,to_server; content:"|a1 a6 a0|"; startswith; content:"|bf 84 90 90 e8 0c|"; distance:8; within:16; fast_pattern; reference:md5,f126ebba071ecab70a832ca04aa06765; reference:url,twitter.com/naumovax/status/1787433507536384139; classtype:trojan-activity; sid:2052457; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_05_07, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_12;)