ET MALWARE MirrorBlast KiXtart Downloader Client Request

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?data="; fast_pattern;
pcre:"/(?:fCxTeXN0ZW0gSWRsZS|wsU3lzdGVtIElkbGUg|8LFN5c3RlbSBJZGxlI)/R";
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
Raw source ET MALWARE MirrorBlast KiXtart Downloader Client Request · 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 MirrorBlast KiXtart Downloader Client Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?data="; fast_pattern;
    pcre:"/(?:fCxTeXN0ZW0gSWRsZS|wsU3lzdGVtIElkbGUg|8LFN5c3RlbSBJZGxlI)/R";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    reference:md5,254022730f51ee770452015b6987b939;
    reference:url,twitter.com/rcwht_/status/1443867650686439489;
    classtype:command-and-control;
    sid:2034091; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_01, deployment Perimeter, malware_family MirrorBlast, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_04;
)

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