ET MALWARE Win32/Denisca.A CnC Beacon

Query · suricata

content:"|7c 2a 26|"; depth:3; fast_pattern;
content:"|7c|"; distance:0;
content:"|7c|"; distance:16; within:1;
content:"|7c|"; distance:0;
pcre:"/\x7c[a-f0-9]{16}\x7c\d+\x7c$/";
Raw source ET MALWARE Win32/Denisca.A CnC Beacon · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Denisca.A CnC Beacon";
    content:"|7c 2a 26|"; depth:3; fast_pattern;
    content:"|7c|"; distance:0;
    content:"|7c|"; distance:16; within:1;
    content:"|7c|"; distance:0;
    pcre:"/\x7c[a-f0-9]{16}\x7c\d+\x7c$/";
    reference:md5,0075c4d976984436443b30926ad818dd;
    classtype:command-and-control;
    sid:2021385; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2015_07_07, deployment Perimeter, malware_family Win32_Denisca_A, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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