alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Witch.3FA0!tr CnC Activity M3"; flow:established,to_server; http.request_line; content:"POST /?opt=put&type="; startswith; fast_pattern; http.header_names; content:!"|0d 0a|User-Agent|0d 0a|"; http.request_body; content:"|22|mac|22 3a 22|"; content:"|22|pcname|22 3a 22|"; distance:14; within:10; reference:md5,4e24d219ba1790b93347110fd1bfcb6b; classtype:trojan-activity; sid:2034959; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_01_24, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_24;)