ET MALWARE Possible Passthru/Kshell Port Redirection Initiation

Query · suricata

flow:to_server,established;
dsize:11;
content:"chkroot2007"; fast_pattern;
Raw source ET MALWARE Possible Passthru/Kshell Port Redirection Initiation · 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 -> $HTTP_SERVERS any (
    msg:"ET MALWARE Possible Passthru/Kshell Port Redirection Initiation";
    flow:to_server,established;
    dsize:11;
    content:"chkroot2007"; fast_pattern;
    reference:md5,f7146691adea573548fa040fb182f4fe;
    reference:url,trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-operation-iron-tiger.pdf;
    classtype:trojan-activity;
    sid:2021796; rev:2;
    metadata:created_at 2015_09_17, confidence Medium, signature_severity Major, updated_at 2019_10_08;
)

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