ET MALWARE Py/MechaFlounder CnC Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:!"|2f|"; depth:1;
content:"--";
content:"|5c|";
content:"-service.html"; fast_pattern; endswith;
http.header_names;
content:!"Referer";
content:!"User-Agent";
Raw source ET MALWARE Py/MechaFlounder CnC Checkin · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Py/MechaFlounder CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:!"|2f|"; depth:1;
    content:"--";
    content:"|5c|";
    content:"-service.html"; fast_pattern; endswith;
    http.header_names;
    content:!"Referer";
    content:!"User-Agent";
    reference:url,unit42.paloaltonetworks.com/new-python-based-payload-mechaflounder-used-by-chafer/;
    classtype:command-and-control;
    sid:2027047; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Python, attack_target Client_and_Server, created_at 2019_03_06, deployment Perimeter, malware_family MechaFlounder, performance_impact Low, confidence High, signature_severity Major, tag APT, tag Chafer, tag Python, updated_at 2020_09_16;
)

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