alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Backdoor Sending Task Status (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/?id="; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; http.request_body; content:"UFVUVEFTSyUlJ"; startswith; fast_pattern; reference:md5,341610a5a0cc430f99f9f9bd694b04a9; classtype:command-and-control; sid:2035643; rev:4; metadata:attack_target Client_Endpoint, created_at 2022_03_29, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Backdoor, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_25;)