ET MALWARE Konni APT Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?q=";
content:".txt"; endswith;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57; fast_pattern;
http.header_names;
content:!"Referer";
target:src_ip;
Raw source ET MALWARE Konni APT Related Activity (GET) · 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 Konni APT Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?q=";
    content:".txt"; endswith;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)"; bsize:57; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:md5,00c85f0aa5f0c3ce51505cf807fd5af3;
    reference:url,twitter.com/ShadowChasing1/status/1636391606592094208;
    classtype:trojan-activity;
    sid:2044694; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_20, deployment Perimeter, malware_family KONNI, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_20;
    target:src_ip;
)

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