alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SideCopy APT Related Backdoor Sending System Information (POST)"; flow:established,to_server; urilen:13; http.method; content:"POST"; http.uri; content:"/user_details"; fast_pattern; http.content_type; content:"boundary=--cpp-httplib-multipart-"; http.user_agent; content:"cpp-httplib/"; startswith; http.header_names; content:!"Referer"; http.request_body; content:"name=|22|ID|22 0d 0a|"; content:"name=|22|Vesrion|22 0d 0a|"; distance:0; content:"name=|22|AV|22 0d 0a|"; distance:0; content:"name=|22|OS|22 0d 0a|"; distance:0; reference:url,twitter.com/suyog41/status/1633822870601363457; reference:md5,2e19b7a2bbdc8082024d259e27e86911; classtype:trojan-activity; sid:2044540; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_03_09, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_09; target:src_ip;)