ET MALWARE LeakyStealer CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE LeakyStealer CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/beacon"; fast_pattern;
    http.user_agent; bsize:41;
    content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|0|3b 20|Win64|3b 20|x64|29|";
    http.request_body;
    content:"|00 00 00|"; startswith;
    content:"LOAD"; distance:1;
    content:"Windows|20|"; distance:0;
    content:"|28|Build"; within:50;
    content:"|29 00 00|"; endswith;
    byte_jump:4,0, post_offset -1;
    isdataat:!2,relative;
    reference:url,hybrid-analysis.blogspot.com/2025/11/leakyinjector-and-leakystealer-duo.html;
    reference:md5,6acc510b440225207a4738fbc0d3b967;
    classtype:trojan-activity;
    sid:2065696; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_11_07, deployment Perimeter, malware_family LeakyStealer, performance_impact Low, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1573, mitre_technique_name Encrypted_Channel;
    target:src_ip;
)