ET MALWARE Cybergate/Rebhip/Spyrat Backdoor Keepalive

Query · suricata

flow:from_server,established;
dsize:<100;
content:"ping|7c|"; depth:5;
content:!"|7c|"; within:1;
Raw source ET MALWARE Cybergate/Rebhip/Spyrat Backdoor Keepalive · 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 Cybergate/Rebhip/Spyrat Backdoor Keepalive";
    flow:from_server,established;
    dsize:<100;
    content:"ping|7c|"; depth:5;
    content:!"|7c|"; within:1;
    classtype:trojan-activity;
    sid:2017990; rev:12;
    metadata:created_at 2011_04_09, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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