ET MALWARE Yahoyah CnC Beacon

Query · suricata

flow:established,to_server;
http.user_agent;
content:"MSIE|28|"; startswith;
content:"|29 29 3b 20|NT|28|"; distance:0;
content:"|29 3b 20|AV|28|"; fast_pattern; distance:0;
content:"|29 3b 20|OV|28|"; distance:0;
content:"|29 3b 20|NA|28|"; distance:0;
content:"|29 20|VR|28|"; distance:0;
http.header_names;
content:!"|0d 0a|Accept";
content:!"|0d 0a|Referer|0d 0a|";
Raw source ET MALWARE Yahoyah CnC Beacon · 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 Yahoyah CnC Beacon";
    flow:established,to_server;
    http.user_agent;
    content:"MSIE|28|"; startswith;
    content:"|29 29 3b 20|NT|28|"; distance:0;
    content:"|29 3b 20|AV|28|"; fast_pattern; distance:0;
    content:"|29 3b 20|OV|28|"; distance:0;
    content:"|29 3b 20|NA|28|"; distance:0;
    content:"|29 20|VR|28|"; distance:0;
    http.header_names;
    content:!"|0d 0a|Accept";
    content:!"|0d 0a|Referer|0d 0a|";
    reference:url,trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp-operation-tropic-trooper.pdf;
    classtype:command-and-control;
    sid:2021114; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_05_18, deployment Perimeter, signature_severity Major, tag c2, updated_at 2024_03_10, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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