ET MALWARE OSX/Mokes.A CnC Heartbeat

Query · suricata

flow:established,to_client;
dsize:<300;
content:"200"; offset:9; depth:3;
content:"Content-Type|3a 20|text/html";
content:"Connection|3a 20|close|0d 0a|";
content:"Content-Encoding|3a 20|gzip|0d 0a|";
flowbits:isset,ET.OSX.Mokes;

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 OSX/Mokes.A CnC Heartbeat · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE OSX/Mokes.A CnC Heartbeat";
    flow:established,to_client;
    dsize:<300;
    content:"200"; offset:9; depth:3;
    content:"Content-Type|3a 20|text/html";
    content:"Connection|3a 20|close|0d 0a|";
    content:"Content-Encoding|3a 20|gzip|0d 0a|";
    flowbits:isset,ET.OSX.Mokes;
    reference:url,securelist.com/blog/research/75990/the-missing-piece-sophisticated-os-x-backdoor-discovered;
    classtype:command-and-control;
    sid:2023183; rev:2;
    metadata:affected_product Mac_OSX, created_at 2016_09_08, deployment Perimeter, malware_family OSX_Mokes_A, confidence High, signature_severity Major, tag OSX_Malware, updated_at 2019_07_26;
)

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