ET MALWARE Arkei/Vidar/Mars Stealer Variant DLL GET Request

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/";
pcre:"/^(?:sqlite|mozglue|nss3|freebl3|softokn3)/R";
content:".dll"; endswith;
http.user_agent;
content:"RT/1.0"; fast_pattern; bsize:6;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Arkei/Vidar/Mars Stealer Variant DLL GET Request · 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 Arkei/Vidar/Mars Stealer Variant DLL GET Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/";
    pcre:"/^(?:sqlite|mozglue|nss3|freebl3|softokn3)/R";
    content:".dll"; endswith;
    http.user_agent;
    content:"RT/1.0"; fast_pattern; bsize:6;
    http.header_names;
    content:!"Referer";
    reference:md5,844ab1b8a2db0242a20a6f3bbceedf6b;
    classtype:trojan-activity;
    sid:2038524; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_08_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_15, reviewed_at 2025_07_14;
)

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