ET ADWARE_PUP Win32/RemoteUtilities Checkin via SMTP M2

Query · suricata

flow:established,to_server;
content:"|0d 0a 0d 0a|UmVtb3RlIFV0aWxpdGllcy"; fast_pattern;
pcre:"/(?:DQpTZXJ2ZXI6I|0KU2VydmVyOi|NClNlcnZlcjog)/R";
Raw source ET ADWARE_PUP Win32/RemoteUtilities Checkin via SMTP M2 · 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 any (
    msg:"ET ADWARE_PUP Win32/RemoteUtilities Checkin via SMTP M2";
    flow:established,to_server;
    content:"|0d 0a 0d 0a|UmVtb3RlIFV0aWxpdGllcy"; fast_pattern;
    pcre:"/(?:DQpTZXJ2ZXI6I|0KU2VydmVyOi|NClNlcnZlcjog)/R";
    reference:md5,8574a1f23e4292f6d76857df1f70ff0e;
    classtype:pup-activity;
    sid:2034644; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_12_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_12;
)

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