ET MALWARE CryptoWall Check-in M2

Query · suricata

flow:established,to_server;
urilen:<110;
http.uri;
pcre:"/[\/=][a-z0-9]{8,}$/";
http.header;
content:" rv|3a|11.0"; fast_pattern;
content:"Accept|3a 20|*/*|0d 0a|Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"; depth:62;
http.request_body;
content:"="; offset:1; depth:1;
pcre:"/^[a-z]=[a-f0-9]{80,}$/";
http.header_names;
content:!"|0d 0a|Accept-"; nocase;
content:!"Referer|0d 0a|";
Raw source ET MALWARE CryptoWall Check-in M2 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE CryptoWall Check-in M2";
    flow:established,to_server;
    urilen:<110;
    http.uri;
    pcre:"/[\/=][a-z0-9]{8,}$/";
    http.header;
    content:" rv|3a|11.0"; fast_pattern;
    content:"Accept|3a 20|*/*|0d 0a|Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"; depth:62;
    http.request_body;
    content:"="; offset:1; depth:1;
    pcre:"/^[a-z]=[a-f0-9]{80,}$/";
    http.header_names;
    content:!"|0d 0a|Accept-"; nocase;
    content:!"Referer|0d 0a|";
    reference:md5,3c53c9f7ab32a09de89bb44e5f91f9af;
    classtype:trojan-activity;
    sid:2020855; rev:6;
    metadata:created_at 2015_04_08, performance_impact Significant, signature_severity Major, updated_at 2024_04_15;
)

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