ET MALWARE Suspected Turla APT Kazuar Backdoor Related Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.cookie;
content:"AspNet.Cookies="; fast_pattern; startswith;
http.request_body;
content:"<"; startswith;
http.header_names;
content:"|0d 0a|Referer|0d 0a|Content-Type|0d 0a|"; startswith;
content:!"Accept";
target:src_ip;
Raw source ET MALWARE Suspected Turla APT Kazuar Backdoor Related Activity · 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 Suspected Turla APT Kazuar Backdoor Related Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.cookie;
    content:"AspNet.Cookies="; fast_pattern; startswith;
    http.request_body;
    content:"<"; startswith;
    http.header_names;
    content:"|0d 0a|Referer|0d 0a|Content-Type|0d 0a|"; startswith;
    content:!"Accept";
    reference:url,unit42.paloaltonetworks.com/pensive-ursa-uses-upgraded-kazuar-backdoor/;
    classtype:trojan-activity;
    sid:2049861; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_12_27, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_27;
    target:src_ip;
)

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