string_obfuscation.py

#Utku Sen

#Divides given string with given block sizes. Might be good for string obfuscation for AV bypass purposes.
#Example:string_divider("[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}",4)
#Output:""+"[Sys"+"tem."+"Net."+"Serv"+"iceP"+"oint"+"Mana"+"ger]"+"::Se"+"rver"+"Cert"+"ific"+"ateV"+"alid"+"atio"+"nCal"+"lbac"+"k = "+"{$tr"+"rue}"+"

def string_divider(string,block_size):
	a = ''
	str_dict = [ o for o in string ]
	parts = [ ''.join( str_dict[ (j * block_size) : ( ( j + 1 ) * block_size ) ]   ) for j in xrange(len(string)/block_size  )]
	parts.append(string[-(len(string)%5):])
	parts = ['"'] + parts
	for i in parts:
		a = a + i+'"+"'
	return a	


#Converts given string to ASCII values. Might be good for string obfuscation for AV bypass purposes.
#Example: string_to_ascii("example","csharp")
#Output: Convert.ToChar(101)+Convert.ToChar(120)+Convert.ToChar(97)+Convert.ToChar(109)+Convert.ToChar(112)+Convert.ToChar(108)+Convert.ToChar(101)
#Example2: string_to_ascii("example","python")
#Output2: chr(101)+chr(120)+chr(97)+chr(109)+chr(112)+chr(108)+chr(101)
def string_to_ascii(string,lang):
	parts = []
	a = ''
	if lang == "csharp":
		for i in string:
			parts.append("Convert.ToChar(" + str(ord(i)) + ")")
		for i in parts:
			a = a + i + '+'
		return a
	elif lang == "python":
		for i in string:
			parts.append("chr(" + str(ord(i)) + ")")
		for i in parts:
			a = a + i + '+'
		return a