ET HUNTING SUSPICIOUS Crystalize Filter in Uncompressed Flash

Query · suricata

flow:from_server,established;
flowbits:isset,HTTP.UncompressedFlash;
file_data;
content:"Crystallize -filter";
content:"|41 41 41 41|"; distance:0;

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 HUNTING SUSPICIOUS Crystalize Filter in Uncompressed Flash · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING SUSPICIOUS Crystalize Filter in Uncompressed Flash";
    flow:from_server,established;
    flowbits:isset,HTTP.UncompressedFlash;
    file_data;
    content:"Crystallize -filter";
    content:"|41 41 41 41|"; distance:0;
    reference:url,www.securelist.com/en/blog/8212/New_Flash_Player_0_day_CVE_2014_0515_used_in_watering_hole_attacks;
    classtype:trojan-activity;
    sid:2018428; rev:2;
    metadata:created_at 2014_04_28, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

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