alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/0xtaRAT CnC Activity M5 (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri.raw; content:"//"; startswith; http.uri; content:".php?GUID="; isdataat:!37,relative; http.request_body; content:"name=|22|file|22 3b 20|filename=|22|_screenshot_"; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:md5,a1a39e458977aa512b7ff2ba1995b18d; reference:url,research.checkpoint.com/2023/operation-silent-watch-desktop-surveillance-in-azerbaijan-and-armenia; classtype:trojan-activity; sid:2046186; 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;)