ET MALWARE Tortoiseshell/HMH Download Request

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".asmx/GetUpdate?val="; fast_pattern;
http.header_names;
content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; depth:22; endswith;
Raw source ET MALWARE Tortoiseshell/HMH Download Request · 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 Tortoiseshell/HMH Download Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".asmx/GetUpdate?val="; fast_pattern;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; depth:22; endswith;
    reference:md5,a194e3bf830104922295c37e6d19d9a2;
    reference:url,blog.talosintelligence.com/2019/09/tortoiseshell-fake-veterans.html;
    classtype:command-and-control;
    sid:2028617; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_09_24, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_17, reviewed_at 2024_02_20;
)

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