ET MALWARE Win32/LeftHook Stealer CnC Command - save_cookies (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.connection;
content:"keep-alive";
http.header;
content:"Origin: chrome-extension://";
pcre:"/^(?:[a-z]{32})\x0d\x0a/R";
http.request_body;
content:"action=save_cookies&cookies="; startswith; fast_pattern;
Raw source ET MALWARE Win32/LeftHook Stealer CnC Command - save_cookies (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/LeftHook Stealer CnC Command - save_cookies (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.connection;
    content:"keep-alive";
    http.header;
    content:"Origin: chrome-extension://";
    pcre:"/^(?:[a-z]{32})\x0d\x0a/R";
    http.request_body;
    content:"action=save_cookies&cookies="; startswith; fast_pattern;
    reference:md5,61bb691f0c875d3d82521a6fa878e402;
    reference:url,twitter.com/Jane_0sint/status/1648075834702413830;
    classtype:trojan-activity;
    sid:2045004; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_04_18, deployment Perimeter, malware_family Win32_LeftHook, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_18;
)

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