alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE DuckTail APT Payload Request"; flow:established,to_server; http.uri; content:"/stubs/nt/"; startswith; fast_pattern; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/"; http.user_agent; content:"WindowsPowerShell/"; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; nocase; reference:url,twitter.com/suyog41/status/1787452543687336087; reference:md5,6b18c0bff7be3ea36fa03eb0d52bd088; classtype:trojan-activity; sid:2052444; 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_05_06, deployment Perimeter, malware_family Ducktail, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_06;)