ET MALWARE Backdoor.Linux.Turla Download

Query · suricata

flow:from_server,established;
flowbits:isset,ET.ELFDownload;
content:"__we_are_happy__";
content:"__TREX__STOP__STRING__"; distance:0;
content:"/dev/random"; distance:1; within:11;

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 Backdoor.Linux.Turla Download · 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 tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Backdoor.Linux.Turla Download";
    flow:from_server,established;
    flowbits:isset,ET.ELFDownload;
    content:"__we_are_happy__";
    content:"__TREX__STOP__STRING__"; distance:0;
    content:"/dev/random"; distance:1; within:11;
    reference:url,securelist.com/blog/research/67962/the-penquin-turla-2/;
    reference:md5,19fbd8cbfb12482e8020a887d6427315;
    classtype:targeted-activity;
    sid:2019896; rev:2;
    metadata:created_at 2014_12_09, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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