ET MALWARE NSIS/TrojanDownloader.Agent.NZK CnC Activity M1

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/ntuser.txt"; bsize:11; fast_pattern;
http.user_agent;
content:"NSIS|5f|Inetc|20 28|Mozilla|29|"; bsize:20;
Raw source ET MALWARE NSIS/TrojanDownloader.Agent.NZK CnC Activity M1 · 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 NSIS/TrojanDownloader.Agent.NZK CnC Activity M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/ntuser.txt"; bsize:11; fast_pattern;
    http.user_agent;
    content:"NSIS|5f|Inetc|20 28|Mozilla|29|"; bsize:20;
    reference:md5,168feb87d7264b4ee2b39cffd7d3b5e3;
    classtype:command-and-control;
    sid:2033990; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_09_21, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_09_21;
)

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