ET EXPLOIT Ghostscript setpattern type confusion attempt (SMTP)

Query · suricata

flow:to_server,established;
file_data;
content:"16#";
content:"setpattern"; distance:0;
pcre:"/16#[^s]\d+\s*\x3E\x3E\s*setpattern/smi";
Raw source ET EXPLOIT Ghostscript setpattern type confusion attempt (SMTP) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert smtp $EXTERNAL_NET any -> $SMTP_SERVERS any (
    msg:"ET EXPLOIT Ghostscript setpattern type confusion attempt (SMTP)";
    flow:to_server,established;
    file_data;
    content:"16#";
    content:"setpattern"; distance:0;
    pcre:"/16#[^s]\d+\s*\x3E\x3E\s*setpattern/smi";
    reference:url,seclists.org/oss-sec/2018/q3/142;
    classtype:attempted-user;
    sid:2026090; rev:2;
    metadata:attack_target SMTP_Server, created_at 2018_09_05, deployment Datacenter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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