ET MALWARE Win32/BlackLotus CnC Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.user_agent;
content:"Mozilla/5.0"; bsize:11;
http.request_body;
content:"checkin="; depth:8; fast_pattern; nocase;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Win32/BlackLotus CnC Activity (POST) · 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 Win32/BlackLotus CnC Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    content:"Mozilla/5.0"; bsize:11;
    http.request_body;
    content:"checkin="; depth:8; fast_pattern; nocase;
    http.header_names;
    content:!"Referer";
    reference:url,welivesecurity.com/2023/03/01/blacklotus-uefi-bootkit-myth-confirmed;
    classtype:command-and-control;
    sid:2044419; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_01, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_BlackLotus, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_01;
)

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