ET MALWARE Backdoor family PCRat/Gh0st CnC traffic

Query · suricata

flow:established,to_server;
stream_size:server,<,5;
dsize:>11;
content:"|78 9c|"; offset:8;
byte_jump:4,-10,relative,little,from_beginning,post_offset -1;
isdataat:!2,relative;
content:!"PWHDR"; depth:5;
Raw source ET MALWARE Backdoor family PCRat/Gh0st CnC traffic · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $HOME_NET !80 -> $EXTERNAL_NET [!5721,!5938] (
    msg:"ET MALWARE Backdoor family PCRat/Gh0st CnC traffic";
    flow:established,to_server;
    stream_size:server,<,5;
    dsize:>11;
    content:"|78 9c|"; offset:8;
    byte_jump:4,-10,relative,little,from_beginning,post_offset -1;
    isdataat:!2,relative;
    content:!"PWHDR"; depth:5;
    reference:url,www.securelist.com/en/descriptions/10155706/Trojan-GameThief.Win32.Magania.eogz;
    reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Backdoor%3AWin32%2FPcClient.ZR&ThreatID=-2147325231;
    reference:url,labs.alienvault.com/labs/index.php/2012/new-macontrol-variant-targeting-uyghur-users-the-windows-version-using-gh0st-rat/;
    reference:url,blogs.rsa.com/will-gragido/lions-at-the-watering-hole-the-voho-affair/;
    reference:url,www.norman.com/about_norman/press_center/news_archive/2012/the_many_faces_of_gh0st_rat/en;
    classtype:command-and-control;
    sid:2016922; rev:15;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_04_23, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, confidence Medium, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2021_09_09;
)

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