alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected APT42/TA453 TAMECAT Loader Related Activity (POST)"; flow:established,to_server; urilen:<10; http.method; content:"POST"; http.uri; content:!"|2e|"; http.user_agent; content:"curl/"; startswith; http.header_names; content:!"Referer|0d 0a|"; http.content_type; bsize:33; content:"application/x-www-form-urlencoded"; http.request_body; content:"1="; depth:3; fast_pattern; content:"&"; distance:0; content:"F1="; distance:1; within:3; content:"&"; distance:0; content:"F1="; distance:1; within:3; reference:md5,d7bf138d1aa2b70d6204a2f3c3bc72a7; reference:url,cloud.google.com/blog/topics/threat-intelligence/untangling-iran-apt42-operations; classtype:trojan-activity; sid:2052412; 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_06, deployment Perimeter, malware_family TA453, malware_family APT42, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_06; target:src_ip;)