ET MALWARE Suspected Stealth Soldier Backdoor Related Activity M2 (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/mkv/MV.txt"; bsize:11; fast_pattern;
http.header_names;
content:"|0d 0a|UA-CPU|0d 0a|";
content:!"Referer";
target:src_ip;
Raw source ET MALWARE Suspected Stealth Soldier Backdoor Related Activity M2 (GET) · 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 Suspected Stealth Soldier Backdoor Related Activity M2 (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/mkv/MV.txt"; bsize:11; fast_pattern;
    http.header_names;
    content:"|0d 0a|UA-CPU|0d 0a|";
    content:!"Referer";
    reference:md5,0db6239ad0755392c31a09e58773cd3b;
    reference:md5,a418886a31852be25064d3573f2bc87d;
    reference:md5,1ea8a827ad4c565b1c2ae43b0a020092;
    reference:url,research.checkpoint.com/2023/stealth-soldier-backdoor-used-in-targeted-espionage-attacks-in-north-africa/;
    classtype:trojan-activity;
    sid:2046201; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_06_12, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_06_12;
    target:src_ip;
)

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