ET SHELLCODE Possible %u41%u41%u41%u41 UTF-8 Heap Spray Attempt

Query · suricata

flow:established,to_client;
content:"%u41%u41%u41%u41"; nocase; fast_pattern;
Raw source ET SHELLCODE Possible %u41%u41%u41%u41 UTF-8 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 %u41%u41%u41%u41 UTF-8 Heap Spray Attempt";
    flow:established,to_client;
    content:"%u41%u41%u41%u41"; nocase; fast_pattern;
    classtype:shellcode-detect;
    sid:2013146; rev:3;
    metadata:created_at 2011_06_30, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;
)

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