ET MALWARE Suspected TA451 Related FalseFont Backdoor Activity M3

Query · suricata

flow:established,to_server;
urilen:10;
http.method;
content:"POST";
http.uri;
content:"/api/Token";
http.request_body;
content:"|7b 22|username|22 3a 22|"; startswith;
content:"|22 2c 22|password|22 3a 22|";
content:"|22 2c 22|computerHostName|22 3a 22|"; fast_pattern;
content:"|22 2c 22|osName|22 3a 22|";
threshold:type limit, count 1, seconds 300, track by_src;
Raw source ET MALWARE Suspected TA451 Related FalseFont Backdoor Activity M3 · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected TA451 Related FalseFont Backdoor Activity M3";
    flow:established,to_server;
    urilen:10;
    http.method;
    content:"POST";
    http.uri;
    content:"/api/Token";
    http.request_body;
    content:"|7b 22|username|22 3a 22|"; startswith;
    content:"|22 2c 22|password|22 3a 22|";
    content:"|22 2c 22|computerHostName|22 3a 22|"; fast_pattern;
    content:"|22 2c 22|osName|22 3a 22|";
    threshold:type limit, count 1, seconds 300, track by_src;
    reference:md5,5b759c6db78de7587a9d201e8ea28c03;
    reference:md5,6fd5d31d607a212c6f7651c79e7655a3;
    reference:url,twitter.com/malwrhunterteam/status/1744660043574698176;
    classtype:trojan-activity;
    sid:2049963; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2024_01_10, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_05, reviewed_at 2024_01_10;
)

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