ET MALWARE Win32/RM3Loader Activity (set)

Query · suricata

flow:established,to_server;
flowbits:set,ET.rm3loader;
flowbits:noalert;
http.method;
content:"POST";
http.uri;
content:".html"; endswith;
http.header_names;
content:"|0d 0a|Cache-Control|0d 0a|Connection|0d 0a|Pragma|0d 0a|"; fast_pattern; startswith;
content:!"Referer";
http.request_body;
content:"|0d 0a|Content-Disposition|3a 20|form-data|3b 20|name=|22|";

Rule dependencies

Feeds into

Raw source ET MALWARE Win32/RM3Loader Activity (set) · 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/RM3Loader Activity (set)";
    flow:established,to_server;
    flowbits:set,ET.rm3loader;
    flowbits:noalert;
    http.method;
    content:"POST";
    http.uri;
    content:".html"; endswith;
    http.header_names;
    content:"|0d 0a|Cache-Control|0d 0a|Connection|0d 0a|Pragma|0d 0a|"; fast_pattern; startswith;
    content:!"Referer";
    http.request_body;
    content:"|0d 0a|Content-Disposition|3a 20|form-data|3b 20|name=|22|";
    reference:md5,aaef17d68339c7f2f19fb780ab90e156;
    classtype:trojan-activity;
    sid:2039122; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_10_07, deployment Perimeter, deployment SSLDecrypt, malware_family ursnif, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_10_07;
)

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