alert http $HOME_NET any -> $EXTERNAL_NET 1024: (
msg:"ET MALWARE Win32/Atlantida Stealer Sending System Information (POST)";
flow:established,to_server;
urilen:1;
http.method;
content:"POST";
http.content_type;
content:"application/x-www-form-urlencoded"; bsize:33;
http.header_names;
content:"|0d 0a|Content-Type|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a|Connection|0d 0a 0d 0a|";
http.request_body;
content:"<Log>"; startswith; fast_pattern;
reference:url,twitter.com/crep1x/status/1626280164547076100;
reference:md5,4f8e6f6b2f467fd50baa4af93225142f;
reference:md5,4d654ec643ef50f03ee3599db0265602;
reference:md5,c6b5bbc3111f1d93c2d42b58948231c2;
classtype:trojan-activity;
sid:2044290; rev:1;
metadata:attack_target Client_Endpoint, created_at 2023_02_22, deployment Perimeter, malware_family Win32_Atlantida, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_22;
target:src_ip;
)