ET MALWARE Suspected Malicious VBS Script Activity

Query · suricata

flow:established,to_server;
http.uri;
content:"/user/get/"; startswith; fast_pattern;
http.user_agent;
content:"Microsoft BITS/"; startswith;
http.host;
pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/";
http.header_names;
content:!"Referer";
Raw source ET MALWARE Suspected Malicious VBS Script 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected Malicious VBS Script Activity";
    flow:established,to_server;
    http.uri;
    content:"/user/get/"; startswith; fast_pattern;
    http.user_agent;
    content:"Microsoft BITS/"; startswith;
    http.host;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/";
    http.header_names;
    content:!"Referer";
    reference:url,blog.group-ib.com/prometheus-tds;
    classtype:trojan-activity;
    sid:2033704; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_08_10, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_10;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.