ET MALWARE GCleaner Downloader Activity M1

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?pub=mix"; fast_pattern;
http.user_agent;
content:!"Mozilla/";
content:"-"; offset:4; depth:1;
content:"-"; distance:4; within:1;
content:"-"; distance:4; within:1; bsize:19;
Raw source ET MALWARE GCleaner Downloader Activity M1 · Suricata
Esc
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 GCleaner Downloader Activity M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?pub=mix"; fast_pattern;
    http.user_agent;
    content:!"Mozilla/";
    content:"-"; offset:4; depth:1;
    content:"-"; distance:4; within:1;
    content:"-"; distance:4; within:1; bsize:19;
    reference:md5,ff4ae9d00058d3e9d5034d043387c4be;
    reference:url,medium.com/csis-techblog/gcleaner-garbage-provider-since-2019-2708e7c87a8a;
    classtype:trojan-activity;
    sid:2032349; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_03_30, deployment Perimeter, malware_family GCleaner, performance_impact Low, confidence High, signature_severity Major, tag Downloader, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_30;
)

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