ET MALWARE Win32/Fareit Variant Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/otproc.asp"; bsize:11;
http.user_agent;
content:"Indy|20|Library|29|"; endswith;
http.request_body;
content:"sGbn="; startswith; fast_pattern;
content:"&sGbn1="; distance:0;
content:"&n5uid="; distance:0;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Win32/Fareit Variant Activity (POST) · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Fareit Variant Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/otproc.asp"; bsize:11;
    http.user_agent;
    content:"Indy|20|Library|29|"; endswith;
    http.request_body;
    content:"sGbn="; startswith; fast_pattern;
    content:"&sGbn1="; distance:0;
    content:"&n5uid="; distance:0;
    http.header_names;
    content:!"Referer";
    reference:md5,bf0c3851bd0cdd2bbdd3902326e37688;
    classtype:trojan-activity;
    sid:2033322; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_07_14, deployment Perimeter, malware_family Win32_Fareit, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_14;
)

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