ET MALWARE Hawkeye Keylogger SMTP Beacon

Query · suricata

flow:established,to_server;
content:"Subject|3a 20|";
content:"SGF3a0V5ZSBLZXlsb2dnZXIg"; within:45;
Raw source ET MALWARE Hawkeye Keylogger SMTP Beacon · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert smtp $HOME_NET any -> $EXTERNAL_NET [25,587] (
    msg:"ET MALWARE Hawkeye Keylogger SMTP Beacon";
    flow:established,to_server;
    content:"Subject|3a 20|";
    content:"SGF3a0V5ZSBLZXlsb2dnZXIg"; within:45;
    reference:md5,dfc2c23663122ac9fc25b708f278c147;
    classtype:trojan-activity;
    sid:2021871; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2015_09_30, deployment Perimeter, 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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