ET MALWARE Arkei/Vidar/Mars Stealer Variant DLL GET Request M2

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/";
pcre:"/^(?:sqlite|mozglue|nss3|freebl3|softokn3)/R";
content:".dll"; within:4; endswith;
http.user_agent;
content:"|20 28|X11|3b 20|CrOS|20|x86_64|20|15329.59.0|29|"; fast_pattern;
http.header_names;
content:!"Referer";
target:src_ip;
Raw source ET MALWARE Arkei/Vidar/Mars Stealer Variant DLL GET Request M2 · 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 M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/";
    pcre:"/^(?:sqlite|mozglue|nss3|freebl3|softokn3)/R";
    content:".dll"; within:4; endswith;
    http.user_agent;
    content:"|20 28|X11|3b 20|CrOS|20|x86_64|20|15329.59.0|29|"; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:md5,7918013ae55de62f5e108342a464864c;
    classtype:trojan-activity;
    sid:2049203; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_11_15, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_15;
    target:src_ip;
)

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