ET EXPLOIT MSXMLHTTP Download of HTA (Observed in CVE-2017-0199)

Query · suricata

flow:established,from_server;
flowbits:isset,et.IE7.NoRef.NoCookie;
http.content_type;
content:"application/hta"; fast_pattern; nocase; bsize:15;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET EXPLOIT MSXMLHTTP Download of HTA (Observed in CVE-2017-0199) · Suricata
Esc
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 EXPLOIT MSXMLHTTP Download of HTA (Observed in CVE-2017-0199)";
    flow:established,from_server;
    flowbits:isset,et.IE7.NoRef.NoCookie;
    http.content_type;
    content:"application/hta"; fast_pattern; nocase; bsize:15;
    classtype:trojan-activity;
    sid:2024197; rev:6;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_04_11, cve CVE_2017_0199, deployment Perimeter, performance_impact Low, signature_severity Major, tag CISA_KEV, updated_at 2020_11_19;
)

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