ET MALWARE CobianRAT Screenshot Exfil to CnC

Query · suricata

flow:to_server,established;
content:"|01 00 00 00 FF FF FF FF 01|"; depth:15;
content:"|02|Sc|7c 2d 7c|"; within:30; fast_pattern;
content:"JFIF"; within:10;
Raw source ET MALWARE CobianRAT Screenshot Exfil to CnC · 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 any -> $EXTERNAL_NET 1024: (
    msg:"ET MALWARE CobianRAT Screenshot Exfil to CnC";
    flow:to_server,established;
    content:"|01 00 00 00 FF FF FF FF 01|"; depth:15;
    content:"|02|Sc|7c 2d 7c|"; within:30; fast_pattern;
    content:"JFIF"; within:10;
    reference:md5,94911666a61beb59d2988c4fc7003e5a;
    reference:url,www.zscaler.com/blogs/research/cobian-rat-backdoored-rat;
    classtype:command-and-control;
    sid:2024655; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_01, deployment Perimeter, malware_family CobianRAT, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2019_07_26;
)

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