ET PHISHING Client Cloaking Javascript Observed

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"|3c|html|3e 3c|head|3e 3c|script|20|src|3d 27|";
content:"Aes|2e|Ctr|2e|decrypt|28|"; nocase; fast_pattern;
pcre:"/^(?:[^0-9][a-zA-Z0-9_$]{1,254}),\s*(?:[^0-9][a-zA-Z0-9_$]{1,254}),\s*256\)\x3b/Ri";
content:"document|2e|write|28|output|29|"; distance:0;
Raw source ET PHISHING Client Cloaking Javascript Observed · 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 -> $HOME_NET any (
    msg:"ET PHISHING Client Cloaking Javascript Observed";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"|3c|html|3e 3c|head|3e 3c|script|20|src|3d 27|";
    content:"Aes|2e|Ctr|2e|decrypt|28|"; nocase; fast_pattern;
    pcre:"/^(?:[^0-9][a-zA-Z0-9_$]{1,254}),\s*(?:[^0-9][a-zA-Z0-9_$]{1,254}),\s*256\)\x3b/Ri";
    content:"document|2e|write|28|output|29|"; distance:0;
    reference:url,unit42.paloaltonetworks.com/javascript-based-phishing/;
    classtype:credential-theft;
    sid:2033947; rev:2;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2021_09_14, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_03;
)

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