ET PHISHING PerSwaysion Phishkit Javascript - Observed Repetitive Custom CSS Components

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"themes/css/"; fast_pattern;
pcre:"/^[a-f0-9]{42}\.css\x27\x29\.then\x28(?:.{1,1000}themes\/css\/[a-f0-9]{42}\.css\x27\x29\.then\x28){5,}/Rsi";
Raw source ET PHISHING PerSwaysion Phishkit Javascript - Observed Repetitive Custom CSS Components · 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 any -> $HOME_NET any (
    msg:"ET PHISHING PerSwaysion Phishkit Javascript - Observed Repetitive Custom CSS Components";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"themes/css/"; fast_pattern;
    pcre:"/^[a-f0-9]{42}\.css\x27\x29\.then\x28(?:.{1,1000}themes\/css\/[a-f0-9]{42}\.css\x27\x29\.then\x28){5,}/Rsi";
    reference:url,blog.group-ib.com/perswaysion;
    classtype:credential-theft;
    sid:2034001; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_21, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_05;
)

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