ET MALWARE Backdoor.Win32.Fynloski.A/DarkRat Checkin Outbound

Query · suricata

flow:to_server,established;
dsize:<16;
content:"KEEPALIVE"; depth:9;
pcre:"/^KEEPALIVE\x7c?\d/";
Raw source ET MALWARE Backdoor.Win32.Fynloski.A/DarkRat Checkin Outbound · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Backdoor.Win32.Fynloski.A/DarkRat Checkin Outbound";
    flow:to_server,established;
    dsize:<16;
    content:"KEEPALIVE"; depth:9;
    pcre:"/^KEEPALIVE\x7c?\d/";
    reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Backdoor%3aWin32%2fFynloski.A&ThreatID=-2147327112;
    reference:url,www.contextis.com/research/blog/darkcometrat/;
    reference:url,www.eff.org/deeplinks/2012/08/syrian-malware-post;
    reference:md5,a2f58a4215441276706f18519dae9102;
    classtype:command-and-control;
    sid:2013090; rev:10;
    metadata:created_at 2010_11_22, signature_severity Major, updated_at 2019_07_26;
)

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