ET HUNTING Suspicious POST with Common Windows Process Names - Possible Process List Exfiltration

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"csrss.exe";
content:"explorer.exe"; fast_pattern;
content:"svchost.exe";
content:"lsass.exe";
Raw source ET HUNTING Suspicious POST with Common Windows Process Names - Possible Process List Exfiltration · 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 HUNTING Suspicious POST with Common Windows Process Names - Possible Process List Exfiltration";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"csrss.exe";
    content:"explorer.exe"; fast_pattern;
    content:"svchost.exe";
    content:"lsass.exe";
    classtype:trojan-activity;
    sid:2027117; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_03_26, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Suspicious_POST_body, updated_at 2020_08_28;
)

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