ET MALWARE Backdoor.Win32.DarkComet Keepalive Inbound

Query · suricata

flow:from_server,established;
dsize:<30;
content:"KEEPALIVE"; nocase; depth:9;
pcre:"/^KEEPALIVE\x7c?\d/i";
Raw source ET MALWARE Backdoor.Win32.DarkComet Keepalive Inbound · 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 Backdoor.Win32.DarkComet Keepalive Inbound";
    flow:from_server,established;
    dsize:<30;
    content:"KEEPALIVE"; nocase; depth:9;
    pcre:"/^KEEPALIVE\x7c?\d/i";
    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/;
    classtype:trojan-activity;
    sid:2013091; rev:7;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2011_06_22, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2019_07_26;
)

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