ET SHELLCODE Possible Backslash Unicode Heap Spray Attempt

Query · suricata

flow:established,to_client;
content:"|5C|u0"; nocase;
content:"|5C|u0"; distance:1; within:4;
pcre:"/\x5Cu0[a-d](\x5Cu0|0)[a-d]/\x5Cu0[a-d](\x5Cu0|0)[a-d]/i";
Raw source ET SHELLCODE Possible Backslash Unicode Heap Spray Attempt · 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 SHELLCODE Possible Backslash Unicode Heap Spray Attempt";
    flow:established,to_client;
    content:"|5C|u0"; nocase;
    content:"|5C|u0"; distance:1; within:4;
    pcre:"/\x5Cu0[a-d](\x5Cu0|0)[a-d]/\x5Cu0[a-d](\x5Cu0|0)[a-d]/i";
    reference:url,www.darkreading.com/security/vulnerabilities/221901428/index.html;
    classtype:shellcode-detect;
    sid:2012970; rev:3;
    metadata:created_at 2011_06_09, performance_impact Significant, confidence Medium, signature_severity Major, updated_at 2024_04_09;
)

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