ET MALWARE Win32/Mesquito Loader Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/CS/index.php?VS="; startswith;
content:"&PL=NAO"; endswith;
http.header.raw;
content:"User-Agent|3a 20 22|Mozilla/5.0|20 20|AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.108 Safari/537.36|22|"; fast_pattern;
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
Raw source ET MALWARE Win32/Mesquito Loader Related Activity (GET) · 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/Mesquito Loader Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/CS/index.php?VS="; startswith;
    content:"&PL=NAO"; endswith;
    http.header.raw;
    content:"User-Agent|3a 20 22|Mozilla/5.0|20 20|AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.108 Safari/537.36|22|"; fast_pattern;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    reference:md5,6d3d9667fce811c895b005dbce80cf24;
    reference:md5,3bef4091fcc587225cce05cd3b818459;
    reference:md5,5c5c0c34b86084c5ab799d28634f7503;
    reference:url,www.metabaseq.com/mosquito-the-new-infostealer-arrives-to-mexico/;
    classtype:trojan-activity;
    sid:2055906; rev:1;
    metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2024_09_17, deployment Perimeter, malware_family Win32_Mesquito, confidence High, signature_severity Major, tag Win32_Mesquito, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17;
)

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