alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ToddyCat APT Related CurCore Activity (POST)"; flow:established,to_server; urilen:1; http.method; content:"POST"; http.header_names; strip_pseudo_headers; to_lowercase; content:"|0d 0a|connection|0d 0a|user-agent|0d 0a|"; startswith; content:!"|0d 0a|referer|0d 0a|"; http.request_body; content:"sd="; startswith; content:"AAAAAAAAQwA6AFwAVQBzAGUAcgBzAFwA"; within:45; fast_pattern; content:"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=="; endswith; reference:md5,e282d63beeb78fc1ef6f954ab3296669; reference:url,research.checkpoint.com/2023/stayin-alive-targeted-attacks-against-telecoms-and-government-ministries-in-asia/; classtype:trojan-activity; sid:2049407; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_11_30, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_27, reviewed_at 2024_04_08; target:src_ip;)