ET EXPLOIT Metasploit Random Base CharCode JS Encoded String

Query · suricata

flow:established,to_client;
file_data;
content:"String.fromCharCode(";
pcre:"/^(?=(?:(:?0x[a-f0-9]{2}|0+?\d{1,3})\s*?,\s*?)*?\d{1,3})(?=(?:(:?0x[a-f0-9]{2}|\d{1,3})\s*?,\s*?)*?0+?\d{1,3})(?=(?:(:?0+?\d{1,3}|\d{1,3})\s*?,\s*?)*?0x[a-f0-9]{2})(?:(:?0x[a-f0-9]{2}|0+?\d{1,3}|\d{1,3})\s*?,\s*?)+(:?0x[a-f0-9]{2}|0+?\d{1,3}|\d{1,3})\s*?\)/Rsi";
Raw source ET EXPLOIT Metasploit Random Base CharCode JS Encoded String · 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 [!443] -> $HOME_NET any (
    msg:"ET EXPLOIT Metasploit Random Base CharCode JS Encoded String";
    flow:established,to_client;
    file_data;
    content:"String.fromCharCode(";
    pcre:"/^(?=(?:(:?0x[a-f0-9]{2}|0+?\d{1,3})\s*?,\s*?)*?\d{1,3})(?=(?:(:?0x[a-f0-9]{2}|\d{1,3})\s*?,\s*?)*?0+?\d{1,3})(?=(?:(:?0+?\d{1,3}|\d{1,3})\s*?,\s*?)*?0x[a-f0-9]{2})(?:(:?0x[a-f0-9]{2}|0+?\d{1,3}|\d{1,3})\s*?,\s*?)+(:?0x[a-f0-9]{2}|0+?\d{1,3}|\d{1,3})\s*?\)/Rsi";
    classtype:trojan-activity;
    sid:2019091; rev:5;
    metadata:affected_product Any, attack_target Client_and_Server, created_at 2014_08_29, deployment Perimeter, deployment Internet, deployment Internal, deployment Datacenter, signature_severity Critical, tag Metasploit, updated_at 2023_06_01;
)

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