ET MALWARE Win32/Formgrabber Data Exfil

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php";
http.request_body;
content:"c="; depth:2;
content:"&v="; distance:0;
content:"&h="; distance:0;
content:"&t="; fast_pattern; distance:0;
pcre:"/^c=[A-F0-9]{10,}&v=[^&]+&h=[^&]+&t=[0-9]$/si";
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Win32/Formgrabber Data Exfil · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Formgrabber Data Exfil";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php";
    http.request_body;
    content:"c="; depth:2;
    content:"&v="; distance:0;
    content:"&h="; distance:0;
    content:"&t="; fast_pattern; distance:0;
    pcre:"/^c=[A-F0-9]{10,}&v=[^&]+&h=[^&]+&t=[0-9]$/si";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,cb066c5625aa85957d6b8d4caef4e497;
    reference:url,thisissecurity.stormshield.com/2017/09/28/analyzing-form-grabber-malware-targeting-browsers;
    classtype:trojan-activity;
    sid:2024781; rev:3;
    metadata:created_at 2017_09_28, malware_family Win32_Formgrabber, confidence High, signature_severity Major, updated_at 2020_08_12;
)

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