ET MALWARE DeerStealer CnC Activity M2

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.connection; bsize:10;
content:"Keep-Alive";
http.header_names;
content:!"|0d 0a|Referer|0d 0a|"; nocase;
http.accept; bsize:3;
content:"|2a 2f 2a|";
http.request_body;
content:"|03 00 00 00 00 00 00 00 00 00 00 00 fd ff ff ff|"; startswith; fast_pattern;
content:"|ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff|"; endswith;
Raw source ET MALWARE DeerStealer CnC Activity M2 · Suricata
Esc
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 DeerStealer CnC Activity M2";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.connection; bsize:10;
    content:"Keep-Alive";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|"; nocase;
    http.accept; bsize:3;
    content:"|2a 2f 2a|";
    http.request_body;
    content:"|03 00 00 00 00 00 00 00 00 00 00 00 fd ff ff ff|"; startswith; fast_pattern;
    content:"|ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff|"; endswith;
    reference:url,x.com/anyrun_app/status/1813940716839522596;
    classtype:trojan-activity;
    sid:2055004; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_07, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Critical, updated_at 2024_08_07;
)

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