ET MALWARE Win32/MassLogger FTP Data Exfiltration

Query · suricata

flow:established,to_server;
content:"|3c 7c 7c 20 20|v"; startswith;
content:"|20 7c 7c 3e|"; distance:0;
content:"User Name|3a 20|";
content:"Windows OS|3a 20|";
content:"MassLogger Started|3a 20|";
content:"Interval|3a 20|";
content:"MassLogger Process|3a 20|"; fast_pattern;
Raw source ET MALWARE Win32/MassLogger FTP Data Exfiltration · 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 tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/MassLogger FTP Data Exfiltration";
    flow:established,to_server;
    content:"|3c 7c 7c 20 20|v"; startswith;
    content:"|20 7c 7c 3e|"; distance:0;
    content:"User Name|3a 20|";
    content:"Windows OS|3a 20|";
    content:"MassLogger Started|3a 20|";
    content:"Interval|3a 20|";
    content:"MassLogger Process|3a 20|"; fast_pattern;
    reference:md5,b044aefa2e42d7efadf53394442fcca6;
    classtype:trojan-activity;
    sid:2037021; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_06_16, deployment Perimeter, malware_family Win32_MassLogger, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_16;
)

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