ET MALWARE JS/Nemucod.M.gen downloading EXE payload

Query · suricata

flow:from_server,established;
flowbits:isset,ET.nemucod.exerequest;
file_data;
content:"MZ"; within:2;
byte_jump:4,58,relative,little;
content:"PE|00 00|"; fast_pattern; distance:-64; within:4;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE JS/Nemucod.M.gen downloading EXE payload · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE JS/Nemucod.M.gen downloading EXE payload";
    flow:from_server,established;
    flowbits:isset,ET.nemucod.exerequest;
    file_data;
    content:"MZ"; within:2;
    byte_jump:4,58,relative,little;
    content:"PE|00 00|"; fast_pattern; distance:-64; within:4;
    reference:url,www.certego.net/en/news/italian-spam-campaigns-using-js-nemucod-downloader/;
    reference:md5,0bc86ab7ead67e264531ccb16c3c529a;
    classtype:trojan-activity;
    sid:2021954; rev:2;
    metadata:created_at 2015_10_15, malware_family JS_Nemucod_M_gen, signature_severity Major, updated_at 2019_07_26;
)

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