ET MALWARE Cylance Ransomware Sending System Information (POST)

Query · suricata

flow:established,to_server;
urilen:<10;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.user_agent;
content:"AppleWebKit/587.38 (KHTML, like Gecko)"; bsize:38;
http.header_names;
content:!"Referer|0d 0a|";
http.request_body;
content:"eyJpcCI6"; startswith; fast_pattern;
target:src_ip;
Raw source ET MALWARE Cylance Ransomware Sending System Information (POST) · Suricata
Esc
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 MALWARE Cylance Ransomware Sending System Information (POST)";
    flow:established,to_server;
    urilen:<10;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    content:"AppleWebKit/587.38 (KHTML, like Gecko)"; bsize:38;
    http.header_names;
    content:!"Referer|0d 0a|";
    http.request_body;
    content:"eyJpcCI6"; startswith; fast_pattern;
    reference:md5,31ed39e13ae9da7fa610f85b56838dde;
    reference:url,twitter.com/Unit42_Intel/status/1641588431221342208;
    classtype:trojan-activity;
    sid:2044917; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_04_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_10;
    target:src_ip;
)

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