ET MALWARE ReverseLoader Reverse Base64 Encoded Executable In Image M1

Query · suricata

flow:established,to_client;
content:"AAAAEAAAAMAAQqVT|3c 3c|BASE64|5f|END|3e 3e|";
isdataat:!1,relative;
Raw source ET MALWARE ReverseLoader Reverse Base64 Encoded Executable In Image M1 · 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-pkt $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (
    msg:"ET MALWARE ReverseLoader Reverse Base64 Encoded Executable In Image M1";
    flow:established,to_client;
    content:"AAAAEAAAAMAAQqVT|3c 3c|BASE64|5f|END|3e 3e|";
    isdataat:!1,relative;
    reference:url,twitter.com/Jane_0sint/status/1694972207896699387;
    reference:url,cyble.com/blog/threat-actor-employs-powershell-backed-steganography-in-recent-spam-campaigns;
    classtype:trojan-activity;
    sid:2047749; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_08_25, deployment Perimeter, malware_family ReverseLoader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_25, reviewed_at 2023_08_25;
)

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