ET HUNTING WebDAV Retrieving .zip containing .exe

Query · suricata

flow:established,to_server;
http.method;
content:"PROPFIND";
http.uri;
content:".zip/";
content:".exe"; distance:0; endswith;
http.user_agent;
content:"Microsoft-WebDAV-MiniRedir/"; startswith;
http.header;
content:"|0d 0a|translate|3a 20|f|0d 0a|"; fast_pattern;
http.header_names;
content:!"Referer";
Raw source ET HUNTING WebDAV Retrieving .zip containing .exe · 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 WebDAV Retrieving .zip containing .exe";
    flow:established,to_server;
    http.method;
    content:"PROPFIND";
    http.uri;
    content:".zip/";
    content:".exe"; distance:0; endswith;
    http.user_agent;
    content:"Microsoft-WebDAV-MiniRedir/"; startswith;
    http.header;
    content:"|0d 0a|translate|3a 20|f|0d 0a|"; fast_pattern;
    http.header_names;
    content:!"Referer";
    classtype:bad-unknown;
    sid:2049439; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_01, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_13, reviewed_at 2024_10_14;
)

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