ET EXPLOIT Lexmark Malicious File Upload Detected

Query · suricata

flow:established,to_server;
http.method;
content:"POST"; bsize:4;
http.uri;
content:"/webglue/uploadfile/ImportFaxLogo"; bsize:33; fast_pattern;
http.request_body;
content:"Content-Disposition|3a 20|form-data|3b 20|name="; nocase;
content:"filename="; nocase; within:255;
pcre:"/(?:[\x7e\x60\x24\x26\x2a\x7c\x3b\x27\x22\x3c\x3e\x3f\x21])/Ri";
Raw source ET EXPLOIT Lexmark Malicious File Upload Detected · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET EXPLOIT Lexmark Malicious File Upload Detected";
    flow:established,to_server;
    http.method;
    content:"POST"; bsize:4;
    http.uri;
    content:"/webglue/uploadfile/ImportFaxLogo"; bsize:33; fast_pattern;
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name="; nocase;
    content:"filename="; nocase; within:255;
    pcre:"/(?:[\x7e\x60\x24\x26\x2a\x7c\x3b\x27\x22\x3c\x3e\x3f\x21])/Ri";
    reference:url,github.com/blasty/lexmark;
    classtype:trojan-activity;
    sid:2044002; rev:1;
    metadata:affected_product IoT, attack_target IoT, created_at 2023_01_26, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_06;
)

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