ET MALWARE Win32/Unknown Stealer CnC Exfil (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.header_names;
content:!"User-Agent";
http.request_body;
content:"|50 4b|"; startswith;
pcre:"/(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})\x2etxt/R";
content:"/cookies.sqlite"; fast_pattern;
content:"logins.json";
content:"Login Data";
Raw source ET MALWARE Win32/Unknown Stealer CnC Exfil (POST) · 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 Win32/Unknown Stealer CnC Exfil (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.header_names;
    content:!"User-Agent";
    http.request_body;
    content:"|50 4b|"; startswith;
    pcre:"/(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})\x2etxt/R";
    content:"/cookies.sqlite"; fast_pattern;
    content:"logins.json";
    content:"Login Data";
    reference:md5,0004c1153084b2e808b65e7fd2788cb9;
    reference:url,twitter.com/g0njxa/status/1677297278371889153;
    classtype:trojan-activity;
    sid:2047615; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_08_10, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_10;
)

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