ET MALWARE Unattributed WebShell Access - Command Execution

Query · suricata

flow:established,to_server;
http.uri;
content:"exec_code=put"; fast_pattern;
content:"delimiter=";
content:!"dst=";
Raw source ET MALWARE Unattributed WebShell Access - Command Execution · 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 any any -> [$HOME_NET,$HTTP_SERVERS] any (
    msg:"ET MALWARE Unattributed WebShell Access - Command Execution";
    flow:established,to_server;
    http.uri;
    content:"exec_code=put"; fast_pattern;
    content:"delimiter=";
    content:!"dst=";
    reference:url,thedfirreport.com/2021/11/15/exchange-exploit-leads-to-domain-wide-ransomware/;
    classtype:attempted-admin;
    sid:2034501; rev:1;
    metadata:created_at 2021_11_18, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_18;
)

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