def invoke_obfuscation(scriptString):

    # Add letters a-z with random case to $RandomDelimiters.
    alphabet = ''.join(choice([i.upper(), i]) for i in ascii_lowercase)

    # Create list of random dxelimiters called randomDelimiters.
    # Avoid using . * ' " [ ] ( ) etc. as delimiters as these will cause problems in the -Split command syntax.
    randomDelimiters = ['_','-',',','{','}','~','!','@','%','&','<','>',';',':']

    for i in alphabet:
        randomDelimiters.append(i)

    # Only use a subset of current delimiters to randomize what you see in every iteration of this script's output.
    randomDelimiters = [choice(randomDelimiters) for _ in range(int(len(randomDelimiters)/4))]

    # Convert $ScriptString to delimited ASCII values in [Char] array separated by random delimiter from defined list $RandomDelimiters.
    delimitedEncodedArray = ''
    for char in scriptString:
        delimitedEncodedArray += str(ord(char)) + choice(randomDelimiters)

    # Remove trailing delimiter from $DelimitedEncodedArray.
    delimitedEncodedArray = delimitedEncodedArray[:-1]
    # Create printable version of $RandomDelimiters in random order to be used by final command.
    test = sample(randomDelimiters, len(randomDelimiters))
    randomDelimitersToPrint = ''.join(i for i in test)

    # Generate random case versions for necessary operations.
    forEachObject = choice(['ForEach','ForEach-Object','%'])
    strJoin = ''.join(choice([i.upper(), i.lower()]) for i in '[String]::Join')
    strStr = ''.join(choice([i.upper(), i.lower()]) for i in '[String]')
    join = ''.join(choice([i.upper(), i.lower()]) for i in '-Join')
    charStr = ''.join(choice([i.upper(), i.lower()]) for i in 'Char')
    integer = ''.join(choice([i.upper(), i.lower()]) for i in 'Int')
    forEachObject = ''.join(choice([i.upper(), i.lower()]) for i in forEachObject)

    # Create printable version of $RandomDelimiters in random order to be used by final command specifically for -Split syntax.
    randomDelimitersToPrintForDashSplit = ''

    for delim in randomDelimiters:
        # Random case 'split' string.
        split = ''.join(choice([i.upper(), i.lower()]) for i in 'Split')

        randomDelimitersToPrintForDashSplit += '-' + split + choice(['', ' ']) + '\'' + delim + '\'' + choice(['', ' '])

    randomDelimitersToPrintForDashSplit = randomDelimitersToPrintForDashSplit.strip('\t\n\r')
    # Randomly select between various conversion syntax options.
    randomConversionSyntax = []
    randomConversionSyntax.append('[' + charStr + ']' + choice(['', ' ']) + '[' + integer + ']' + choice(['', ' ']) + '$_')
    randomConversionSyntax.append('[' + integer + ']' + choice(['', ' ']) + '$_' + choice(['', ' ']) + choice(['-as', '-As', '-aS', '-AS']) + choice(['', ' ']) + '[' + charStr + ']')
    randomConversionSyntax = choice(randomConversionSyntax)

    # Create array syntax for encoded scriptString as alternative to .Split/-Split syntax.
    encodedArray = ''
    for char in scriptString:
        encodedArray += str(ord(char)) + choice(['', ' ']) + ',' + choice(['', ' '])

    # Remove trailing comma from encodedArray
    encodedArray = '(' + choice(['', ' ']) + encodedArray.rstrip().rstrip(',') + ')'

    # Generate random syntax to create/set OFS variable ($OFS is the Output Field Separator automatic variable).
    # Using Set-Item and Set-Variable/SV/SET syntax. Not using New-Item in case OFS variable already exists.
    # If the OFS variable did exists then we could use even more syntax: $varname, Set-Variable/SV, Set-Item/SET, Get-Variable/GV/Variable, Get-ChildItem/GCI/ChildItem/Dir/Ls
    # For more info: https://msdn.microsoft.com/en-us/powershell/reference/5.1/microsoft.powershell.core/about/about_automatic_variables
    setOfsVarSyntax = []
    setOfsVarSyntax.append('Set-Item' + choice([' '*1, ' '*2]) + "'Variable:OFS'" + choice([' '*1, ' '*2]) + "''")
    setOfsVarSyntax.append(choice(['Set-Variable', 'SV', 'SET']) + choice([' '*1, ' '*2]) + "'OFS'" + choice([' '*1, ' '*2]) + "''")
    setOfsVar = choice(setOfsVarSyntax)

    setOfsVarBackSyntax = []
    setOfsVarBackSyntax.append('Set-Item' + choice([' '*1, ' '*2]) + "'Variable:OFS'" + choice([' '*1, ' '*2]) + "' '")
    setOfsVarBackSyntax.append('Set-Item' + choice([' '*1, ' '*2]) + "'Variable:OFS'" + choice([' '*1, ' '*2]) + "' '")
    setOfsVarBack = choice(setOfsVarBackSyntax)

    # Randomize case of $SetOfsVar and $SetOfsVarBack.
    setOfsVar = ''.join(choice([i.upper(), i.lower()]) for i in setOfsVar)
    setOfsVarBack = ''.join(choice([i.upper(), i.lower()]) for i in setOfsVarBack)

    # Generate the code that will decrypt and execute the payload and randomly select one.
    baseScriptArray = []
    baseScriptArray.append('[' + charStr + '[]' + ']' + choice(['', ' ']) + encodedArray)
    baseScriptArray.append('(' + choice(['', ' ']) + "'" + delimitedEncodedArray + "'." + split + "(" + choice(['', ' ']) + "'" + randomDelimitersToPrint + "'" + choice(['', ' ']) + ')' + choice(['', ' ']) + '|' + choice(['', ' ']) + forEachObject + choice(['', ' ']) + '{' + choice(['', ' ']) + '(' + choice(['', ' ']) + randomConversionSyntax + ')' + choice(['', ' ']) + '}' + choice(['', ' ']) + ')')
    baseScriptArray.append('(' + choice(['', ' ']) + "'" + delimitedEncodedArray + "'" + choice(['', ' ']) + randomDelimitersToPrintForDashSplit + choice(['', ' ']) + '|' + choice(['', ' ']) + forEachObject + choice(['', ' ']) + '{' + choice(['', ' ']) + '(' + choice(['', ' ']) + randomConversionSyntax + ')' + choice(['', ' ']) + '}' + choice(['', ' ']) + ')')
    baseScriptArray.append('(' + choice(['', ' ']) + encodedArray + choice(['', ' ']) + '|' + choice(['', ' ']) + forEachObject + choice(['', ' ']) + '{' + choice(['', ' ']) + '(' + choice(['', ' ']) + randomConversionSyntax + ')' + choice(['', ' ']) + '}' + choice(['', ' ']) + ')')
    # Generate random JOIN syntax for all above options
    newScriptArray = []
    newScriptArray.append(choice(baseScriptArray) + choice(['', ' ']) + join + choice(['', ' ']) + "''")
    newScriptArray.append(join + choice(['', ' ']) + choice(baseScriptArray))
    newScriptArray.append(strJoin + '(' + choice(['', ' ']) + "''" + choice(['', ' ']) + ',' + choice(['', ' ']) + choice(baseScriptArray) + choice(['', ' ']) + ')')
    newScriptArray.append('"' + choice(['', ' ']) + '$(' + choice(['', ' ']) + setOfsVar + choice(['', ' ']) + ')' + choice(['', ' ']) + '"' + choice(['', ' ']) + '+' + choice(['', ' ']) + strStr + choice(baseScriptArray) + choice(['', ' ']) + '+' + '"' + choice(['', ' ']) + '$(' + choice(['', ' ']) + setOfsVarBack + choice(['', ' ']) + ')' + choice(['', ' ']) + '"')

    # Randomly select one of the above commands.
    newScript = choice(newScriptArray)

    # Generate random invoke operation syntax.
    # Below code block is a copy from Out-ObfuscatedStringCommand.ps1. It is copied into this encoding function so that this will remain a standalone script without dependencies.
    invokeExpressionSyntax  = []
    invokeExpressionSyntax.append(choice(['IEX', 'Invoke-Expression']))
    # Added below slightly-randomized obfuscated ways to form the string 'iex' and then invoke it with . or &.
    # Though far from fully built out, these are included to highlight how IEX/Invoke-Expression is a great indicator but not a silver bullet.
    # These methods draw on common environment variable values and PowerShell Automatic Variable values/methods/members/properties/etc.
    invocationOperator = choice(['.','&']) + choice(['', ' '])
    invokeExpressionSyntax.append(invocationOperator + "( $ShellId[1]+$ShellId[13]+'x')")
    invokeExpressionSyntax.append(invocationOperator + "( $PSHome[" + choice(['4', '21']) + "]+$PSHOME[" + choice(['30', '34']) + "]+'x')")
    invokeExpressionSyntax.append(invocationOperator + "( $env:Public[13]+$env:Public[5]+'x')")
    invokeExpressionSyntax.append(invocationOperator + "( $env:ComSpec[4," + choice(['15', '24', '26']) + ",25]-Join'')")
    invokeExpressionSyntax.append(invocationOperator + "((" + choice(['Get-Variable','GV','Variable']) + " '*mdr*').Name[3,11,2]-Join'')")
    invokeExpressionSyntax.append(invocationOperator + "( " + choice(['$VerbosePreference.ToString()','([String]$VerbosePreference)']) + "[1,3]+'x'-Join'')")

    # Randomly choose from above invoke operation syntaxes.
    invokeExpression = choice(invokeExpressionSyntax)

     # Randomize the case of selected invoke operation.
    invokeExpression = ''.join(choice([i.upper(), i.lower()]) for i in invokeExpression)

    # Choose random Invoke-Expression/IEX syntax and ordering: IEX ($ScriptString) or ($ScriptString | IEX)
    invokeOptions = []
    invokeOptions.append(choice(['', ' ']) + invokeExpression + choice(['', ' ']) + '(' + choice(['', ' ']) + newScript + choice(['', ' ']) + ')' + choice(['', ' ']))
    invokeOptions.append(choice(['', ' ']) + newScript + choice(['', ' ']) + '|' + choice(['', ' ']) + invokeExpression)

    obfuscatedPayload = choice(invokeOptions)

    """
    # Array to store all selected PowerShell execution flags.
    powerShellFlags = []

    noProfile = '-nop'
    nonInteractive = '-noni'
    windowStyle = '-w'

    # Build the PowerShell execution flags by randomly selecting execution flags substrings and randomizing the order.
    # This is to prevent Blue Team from placing false hope in simple signatures for common substrings of these execution flags.
    commandlineOptions = []
    commandlineOptions.append(noProfile[0:randrange(4, len(noProfile) + 1, 1)])
    commandlineOptions.append(nonInteractive[0:randrange(5, len(nonInteractive) + 1, 1)])
    # Randomly decide to write WindowStyle value with flag substring or integer value.
    commandlineOptions.append(''.join(windowStyle[0:randrange(2, len(windowStyle) + 1, 1)] + choice([' '*1, ' '*2, ' '*3]) + choice(['1','h','hi','hid','hidd','hidde'])))

    # Randomize the case of all command-line arguments.
    for count, option in enumerate(commandlineOptions):
        commandlineOptions[count] = ''.join(choice([i.upper(), i.lower()]) for i in option)

    for count, option in enumerate(commandlineOptions):
        commandlineOptions[count] = ''.join(option)

    commandlineOptions = sample(commandlineOptions, len(commandlineOptions)) 
    commandlineOptions = ''.join(i + choice([' '*1, ' '*2, ' '*3]) for i in commandlineOptions)

    obfuscatedPayload = 'powershell.exe ' + commandlineOptions + newScript
    """

    return obfuscatedPayload