ET ATTACK_RESPONSE PowerShell Internet Connectivity Check via Network GUID Inbound

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:!"<html";
content:"|3a 3a|GetTypeFromCLSID"; nocase;
content:"|5b|Guid|5d 27 7b|DCB00C01-570F-4A9B-8D69-199FDBA5723B|7d 27 29 29|.IsConnectedToInternet"; distance:0; nocase; fast_pattern;
Raw source ET ATTACK_RESPONSE PowerShell Internet Connectivity Check via Network GUID Inbound · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET ATTACK_RESPONSE PowerShell Internet Connectivity Check via Network GUID Inbound";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:!"<html";
    content:"|3a 3a|GetTypeFromCLSID"; nocase;
    content:"|5b|Guid|5d 27 7b|DCB00C01-570F-4A9B-8D69-199FDBA5723B|7d 27 29 29|.IsConnectedToInternet"; distance:0; nocase; fast_pattern;
    reference:md5,036180b14dce975a055e62902e5f3567;
    classtype:trojan-activity;
    sid:2027394; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_05_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag PowerShell, tag T1086, updated_at 2024_12_12;
)

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