ET MALWARE Unk Loader Host Profiling Data Exfiltration Attempt


Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
pcre:"/^\x2f[a-fA-F0-9]{32}$/";
http.request_body;
content:"|22|systemInfo|22 3a|";
content:"|22|HostName|22 3a|";
content:"|22|CurrentUser|22 3a|";
content:"|22|OSVersion|22 3a|";
content:"|22|OSName|22 3a|";
content:"|22|CPUModel|22 3a|";
content:"|22|TotalMemoryMB|22 3a|";
content:"|22|PowerShellVersion|22 3a|"; fast_pattern;
content:"|22|Architecture|22 3a|";
content:"|22|securityInfo|22 3a|";
content:"|22|AVProducts|22 3a|";
content:"|22|logData|22 3a|";
content:"|22|execPolicy|22 3a|";
target:src_ip;
Raw source ET MALWARE Unk Loader Host Profiling Data Exfiltration Attempt · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Unk Loader Host Profiling Data Exfiltration Attempt";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^\x2f[a-fA-F0-9]{32}$/";
    http.request_body;
    content:"|22|systemInfo|22 3a|";
    content:"|22|HostName|22 3a|";
    content:"|22|CurrentUser|22 3a|";
    content:"|22|OSVersion|22 3a|";
    content:"|22|OSName|22 3a|";
    content:"|22|CPUModel|22 3a|";
    content:"|22|TotalMemoryMB|22 3a|";
    content:"|22|PowerShellVersion|22 3a|"; fast_pattern;
    content:"|22|Architecture|22 3a|";
    content:"|22|securityInfo|22 3a|";
    content:"|22|AVProducts|22 3a|";
    content:"|22|logData|22 3a|";
    content:"|22|execPolicy|22 3a|";
    reference:md5,676341fd22b73e8836c09ead43d6fbc4;
    classtype:trojan-activity;
    sid:2061613; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, tls_state TLSDecrypt, created_at 2025_04_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Loader, updated_at 2025_04_15, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
    target:src_ip;
)

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