ET MALWARE Operation Mystery Baby syschk CnC Communication

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.content_type;
content:"multipart / form-data|3b 20|boundary = -------- 1650502037"; fast_pattern; endswith;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Operation Mystery Baby syschk CnC Communication · 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 Operation Mystery Baby syschk CnC Communication";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.content_type;
    content:"multipart / form-data|3b 20|boundary = -------- 1650502037"; fast_pattern; endswith;
    http.header_names;
    content:!"Referer";
    reference:url,blog.alyac.co.kr/m/1963;
    classtype:command-and-control;
    sid:2026614; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_11_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_16;
)

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