alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/0xtaRAT CnC Activity M4 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?GUID="; content:"&come=1"; distance:25; within:7; endswith; fast_pattern; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; bsize:37; reference:md5,6ac414fad3d61ad5b23c2bcdd8ee797f; reference:url,research.checkpoint.com/2023/operation-silent-watch-desktop-surveillance-in-azerbaijan-and-armenia; classtype:trojan-activity; sid:2046185; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_06_09, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_0xtaRAT, performance_impact Low, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_09; target:src_ip;)