ET MALWARE VenusLocker Activity

Query · suricata

flow:established,to_server;
http.uri;
content:"/dumbdumb?"; startswith; fast_pattern;
pcre:"/\=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
http.accept;
content:"text/*"; bsize:6;
http.header_names;
content:!"Referer";
content:!"Connect";
Raw source ET MALWARE VenusLocker Activity · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE VenusLocker Activity";
    flow:established,to_server;
    http.uri;
    content:"/dumbdumb?"; startswith; fast_pattern;
    pcre:"/\=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/R";
    http.accept;
    content:"text/*"; bsize:6;
    http.header_names;
    content:!"Referer";
    content:!"Connect";
    reference:md5,9aa3cc9d7c641ea22cfa3e5233e13c94;
    classtype:trojan-activity;
    sid:2032968; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_05_17, deployment Perimeter, malware_family VenusLocker, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_17;
)

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