alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TA457 Related Activity (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/GO/"; startswith; fast_pattern; content:".php"; endswith; http.header_names; content:"|0d 0a|Host|0d 0a|User-Agent|0d 0a|Content-Length|0d 0a|Accept-Encoding|0d 0a|Content-Type|0d 0a 0d 0a|"; http.content_len; byte_test:0,=,0,0,string,dec; reference:md5,f8c29040122cf892190bcf3665975d2f; reference:url,research.checkpoint.com/2022/state-sponsored-attack-groups-capitalise-on-russia-ukraine-war-for-cyber-espionage/; classtype:trojan-activity; sid:2036756; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_06_02, deployment Perimeter, malware_family TA457, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_02;)