ET MALWARE CoreDDRAT Screenshot Exfil

Query · suricata

flow:established,to_server;
content:"|40 2f 44 44 48 63 6b 2f 2e|"; startswith; fast_pattern;
content:"|2c 2f 44 44 48 63 6b 2f 2e|"; within:100;
content:"|4a 46 49 46|"; within:10;
threshold:type limit, track by_src, count 1, seconds 30;
Raw source ET MALWARE CoreDDRAT Screenshot Exfil · 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 1024: (
    msg:"ET MALWARE CoreDDRAT Screenshot Exfil";
    flow:established,to_server;
    content:"|40 2f 44 44 48 63 6b 2f 2e|"; startswith; fast_pattern;
    content:"|2c 2f 44 44 48 63 6b 2f 2e|"; within:100;
    content:"|4a 46 49 46|"; within:10;
    threshold:type limit, track by_src, count 1, seconds 30;
    reference:md5,f3b3013101e1ae9b0e0ec709f3341cb9;
    reference:url,twitter.com/pmelson/status/1241914864853008384;
    classtype:command-and-control;
    sid:2029727; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_23, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_03_23;
)

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