ET MALWARE ReverseLoader Reverse Base64 Encoded Executable In Image M2

alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE ReverseLoader Reverse Base64 Encoded Executable In Image M2";
    flow:established,to_client;
    content:"|3c 3c|BASE64|5f|END";
    reference:md5,6c97bdd98e5eb53bd85aafef890673d1;
    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:2049038; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_01, deployment Perimeter, deployment SSLDecrypt, malware_family ReverseLoader, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_08, reviewed_at 2023_11_01;
)