ET MALWARE Likely Malicious Windows SCT Download MSXMLHTTP M3

Query · suricata

flow:established,from_server;
flowbits:isset,et.IE7.NoRef.NoCookie;
http.header;
content:"Content-Disposition|3a 20|"; nocase;
content:".sct"; nocase; fast_pattern;
pcre:"/^Content-Disposition\x3a[^\r\n]*\.sct[\x22\x27\s\r\n]/mi";

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 MALWARE Likely Malicious Windows SCT Download MSXMLHTTP M3 · 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 MALWARE Likely Malicious Windows SCT Download MSXMLHTTP M3";
    flow:established,from_server;
    flowbits:isset,et.IE7.NoRef.NoCookie;
    http.header;
    content:"Content-Disposition|3a 20|"; nocase;
    content:".sct"; nocase; fast_pattern;
    pcre:"/^Content-Disposition\x3a[^\r\n]*\.sct[\x22\x27\s\r\n]/mi";
    classtype:trojan-activity;
    sid:2024552; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_15, deployment Perimeter, malware_family PowerShell, confidence Medium, signature_severity Major, tag PowerShell_Downloader, updated_at 2020_10_09;
)

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