ET MALWARE Possibly Malicious Base64 Unicode WebClient DownloadString M1

Query · suricata

flow:established,from_server;
file_data;
content:"VwBlAGIAQwBsAGkAZQBuAHQAKQAuAEQAbwB3AG4AbABvAGEAZABTAHQAcgBpAG4AZ";
Raw source ET MALWARE Possibly Malicious Base64 Unicode WebClient DownloadString M1 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Possibly Malicious Base64 Unicode WebClient DownloadString M1";
    flow:established,from_server;
    file_data;
    content:"VwBlAGIAQwBsAGkAZQBuAHQAKQAuAEQAbwB3AG4AbABvAGEAZABTAHQAcgBpAG4AZ";
    reference:md5,2a0df97277ddb361cecf8726df6d78ac;
    classtype:trojan-activity;
    sid:2023941; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_02_16, deployment Perimeter, confidence High, signature_severity Major, updated_at 2019_07_26;
)

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