ET MALWARE Win32/Valak Variant CnC

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?hst="; fast_pattern;
http.user_agent;
content:"WindowsPowerShell/";
Raw source ET MALWARE Win32/Valak Variant CnC · 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 Win32/Valak Variant CnC";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?hst="; fast_pattern;
    http.user_agent;
    content:"WindowsPowerShell/";
    reference:url,unit42.paloaltonetworks.com/cortex-xdr-detects-netsupport-manager-rat-campaign/;
    reference:md5,dfd424684f3a5c44ff425c7fe425ca8b;
    classtype:command-and-control;
    sid:2030853; rev:1;
    metadata:created_at 2020_09_11, malware_family Win32_Valak, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_11;
)

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