# Define the file path $file = "full\path\to\Dunia.dll" # Define the byte sequence to search for and the replacement byte $originalBytes = [byte[]](0x0A, 0x3B, 0xCA, 0x75, 0x0A) $replacementByte = [byte]0x14 $offset = 0x0074D865 try { # Read the file in binary mode $fileStream = [System.IO.File]::Open($file, 'Open', 'ReadWrite') $binaryReader = New-Object System.IO.BinaryReader($fileStream) $binaryWriter = New-Object System.IO.BinaryWriter($fileStream) # Go to the specified offset $fileStream.Seek($offset, [System.IO.SeekOrigin]::Begin) | Out-Null # Read bytes at the offset $bytesAtOffset = $binaryReader.ReadBytes($originalBytes.Length) # Compare the bytes if ($bytesAtOffset -join ',' -eq $originalBytes -join ',') { Write-Host "Sequence found at offset. Updating the byte..." # Write the replacement byte $fileStream.Seek($offset, [System.IO.SeekOrigin]::Begin) | Out-Null $binaryWriter.Write($replacementByte) Write-Host "First byte changed successfully." } else { Write-Host "The specified byte sequence was not found at the given offset." } } catch { Write-Host "An error occurred: $_" } finally { # Close the file streams $binaryReader.Close() $binaryWriter.Close() $fileStream.Close() } Write-Host "Operation completed."