ET MALWARE W32/VBS.SLoad.Backdoor Initial Base64 Encoded OK Server Response

Query · suricata

flow:established,to_client;
http.header;
content:"Authorization|3a 20|b2sgb2s=";
Raw source ET MALWARE W32/VBS.SLoad.Backdoor Initial Base64 Encoded OK Server Response · 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 http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE W32/VBS.SLoad.Backdoor Initial Base64 Encoded OK Server Response";
    flow:established,to_client;
    http.header;
    content:"Authorization|3a 20|b2sgb2s=";
    reference:url,www.fireeye.com/blog/threat-research/2019/03/winrar-zero-day-abused-in-multiple-campaigns.html;
    reference:md5,3aabc9767d02c75ef44df6305bc6a41f;
    classtype:trojan-activity;
    sid:2027118; rev:3;
    metadata:created_at 2019_03_27, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_28;
)

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