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![Permalink for '[Video] News Key Recovery Attacks on RC4/WEP'](/themes/lilina/web//media/mark_off.gif)
14:48
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SecDocs
Authors:
Martin Vuagnoux Tags:
WiFi Event:
Chaos Communication Congress 27th (27C3) 2010 Abstract: In this paper, we present several weaknesses in the stream cipher RC4. First, we present a technique to automatically reveal linear correlations in the PRGA of RC4. With this method, 48 new exploitable correlations have been discovered. Then we bind these new biases in the PRGA with known KSA weaknesses to provide practical key recovery attacks. Henceforth, we apply a similar technique on RC4 as a black box, i.e. the secret key words as input and the keystream words as output. Our objective is to exhaustively find linear correlations between these elements. Thanks to this technique, 9 new exploitable correlations have been revealed. Finally, we exploit these weaknesses on RC4 to some practical examples, such as the WEP protocol. We show that these correlations lead to a key recovery attack on WEP with only 9,800 encrypted packets (less than 20 seconds), instead of 24,200 for the best previous attack.
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14:35
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SecDocs
Authors:
Martin Vuagnoux Tags:
WiFi Event:
Chaos Communication Congress 27th (27C3) 2010 Abstract: In this paper, we present several weaknesses in the stream cipher RC4. First, we present a technique to automatically reveal linear correlations in the PRGA of RC4. With this method, 48 new exploitable correlations have been discovered. Then we bind these new biases in the PRGA with known KSA weaknesses to provide practical key recovery attacks. Henceforth, we apply a similar technique on RC4 as a black box, i.e. the secret key words as input and the keystream words as output. Our objective is to exhaustively find linear correlations between these elements. Thanks to this technique, 9 new exploitable correlations have been revealed. Finally, we exploit these weaknesses on RC4 to some practical examples, such as the WEP protocol. We show that these correlations lead to a key recovery attack on WEP with only 9,800 encrypted packets (less than 20 seconds), instead of 24,200 for the best previous attack.
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14:34
»
SecDocs
Authors:
Martin Vuagnoux Tags:
WiFi Event:
Chaos Communication Congress 27th (27C3) 2010 Abstract: In this paper, we present several weaknesses in the stream cipher RC4. First, we present a technique to automatically reveal linear correlations in the PRGA of RC4. With this method, 48 new exploitable correlations have been discovered. Then we bind these new biases in the PRGA with known KSA weaknesses to provide practical key recovery attacks. Henceforth, we apply a similar technique on RC4 as a black box, i.e. the secret key words as input and the keystream words as output. Our objective is to exhaustively find linear correlations between these elements. Thanks to this technique, 9 new exploitable correlations have been revealed. Finally, we exploit these weaknesses on RC4 to some practical examples, such as the WEP protocol. We show that these correlations lead to a key recovery attack on WEP with only 9,800 encrypted packets (less than 20 seconds), instead of 24,200 for the best previous attack.
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22:43
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SecDocs
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13:53
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SecDocs
Authors:
Diego Sor Leandro Meiners Tags:
wireless WiFi Event:
Black Hat USA 2010 Abstract: Cisco access points support WPA migration mode, which enables both WPA and WEP clients to associate to an access point using the same Service Set Identifier (SSID). If WEP clients are still around, we can use the traditional WEP cracking arsenal against them. Therefore, we focused on analyzing the consequences of having this feature enabled when no WEP clients are present; for example after the migration to WPA has been carried out but this feature has been left enabled. We found that it is possible for an attacker to crack the WEP key under this scenario (i.e. no WEP clients). Once the key is recovered, it is possible to connect to the access point using this key (as it is operating in WPA migration mode) and access the network.
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13:53
»
SecDocs
Authors:
Diego Sor Leandro Meiners Tags:
wireless WiFi Event:
Black Hat USA 2010 Abstract: Cisco access points support WPA migration mode, which enables both WPA and WEP clients to associate to an access point using the same Service Set Identifier (SSID). If WEP clients are still around, we can use the traditional WEP cracking arsenal against them. Therefore, we focused on analyzing the consequences of having this feature enabled when no WEP clients are present; for example after the migration to WPA has been carried out but this feature has been left enabled. We found that it is possible for an attacker to crack the WEP key under this scenario (i.e. no WEP clients). Once the key is recovered, it is possible to connect to the access point using this key (as it is operating in WPA migration mode) and access the network.
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13:00
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Hack a Day
[Ben Kurtz] is doing a little WEP cracking but in a bit of a different way than we’re used to. WEP cracking makes us think of war driving; driving around with your laptop open, looking for WiFi access points, and stopping to run some software when you find them. [Ben's] way is similar but different [...]
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9:44
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remote-exploit & backtrack
Bonjour :)
Mon probléme est simple. Je veux cracké un wifi en WEP (numericable) et sa normalement sa me pose aucun probléme (surtout avec les numericable :p ) sauf certaines box qui s'obstine à ne jamais rien vouloir envoyé comme packet.
Je suis donc à la recherche d'une technique ou d'un logiciel ou quelque chose qui serai capable de forcer la box à se bouger le cul et à envoyer quelques petit mais précieux packet.
Merci d'avance pour votre aide
Bisous ;)
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23:27
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remote-exploit & backtrack
hi all
i have TP-link rt73 usb and D-link dwa-110 and D-link DWL-520+ and so many other adapters !
i tried to pentest my network with D-link 2640tl AP with wep encryption (my pass is 1234567890) !! the problem is none of this adapters are able to athenticate with Ap ( i installed drivers patch too)!! and the test option in aireplay-ng gives me 0% !! i read both rt73 and dwa 110 is capable of injecting and .. (even airecrack-ng's official web site advised to buy rt73 based adapter! ) can any one give me a tip !!
i used following commands:
$myAPmaC and $MyADapterMac are exported before!
Code:
aireplay-ng -1 50 -a $myAPmaC -h $MyADapterMac wlan0
thanks anyway and excuse my weak english!!
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14:08
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remote-exploit & backtrack
He all,
I have a problem, I run Backtrack 4 final in Vmware, on my laptop for crack wep and wpa it's great, but when I launche wireshark. It seems that it only capture reqeust from PC's like DHCP request etc. when filter out the POP I can't see a thing thoug I send and receive mails on my other pc(windows 7) now I run wireshark on windows 7 and send and receive it does see it.
So why is wireshark only looking in my laptop and not the other PC's. btw I use briged network in vmware
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5:56
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remote-exploit & backtrack
Dear All
i have a N150 netgear router and i am trying to break the wep code on it.
i have logged into it to apply the following settings:
enc:wep 64bit
key:1B9DDA483D
i have tried the usual packet injection method using aireplay to break into my bt business hub with no issue however when i do the same for the netgear the number of data packets captured does not go above 255!
i do not know why this is!
any ideas
cheers
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10:03
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remote-exploit & backtrack
salut,
est ce que on peut cracker un clé wep lorsque le routeur cible utilise un filtrage d'adresse MAC .
merci d'avance .
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10:57
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remote-exploit & backtrack
hi all
i have a little question!
we've setup a AP with wep shared key and i consumed that a hacker may have my wep !!
so we decided to limit the MAC address of the wireless cards !
is there any way that someone can fake this MACs or bypass this limitation anyway?
i read that if this limitation presents! with a tcpdump command it is possible to notice
this by getting deauth result, so i want to know can this limitation protect my AP?!
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9:29
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remote-exploit & backtrack
i am beginner ... i am trying to crack wep key of a wi fi network ....its my home network and its key is a mobile no .... i did everything and got the pcap file of handshaking signal using airoplay-ng
its a .cap file ....now how to get the wep key from it since dictionaty attack wont work .....so tell me a brute force method to get it
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9:29
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remote-exploit & backtrack
i am beginner ... i am trying to crack wep key of a wi fi network ....its my home network and its key is a mobile no .... i did everything and got the pcap file of handshaking signal using airoplay-ng
its a .cap file ....now how to get the wep key from it since dictionaty attack wont work .....so tell me a brute force method to get it
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8:46
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remote-exploit & backtrack
i have d-link dwl 2100 ap connected to biquied patch using low-loss coxial cable it works like charm can this be done to usb dongle so that i can put the antenna which comes with the dongle far to get better range or to extend it.if yes how long the coxial cable should be.the usb dongle gives 17dbm connected 2 dbi omni antenna.?
if that can't be done.i have d-link dwl-2100 ap it acts as repeater also but thing is that you should put the root wep. i need to crack the root acess point wep.using my acess point as repeater then seat near my acess point with dongle connected to laptop.i have permission from my uncle(the root acess point is for my uncle) to do that.i wanna do this for eductianal perpose only. not for illegeal activites so i'm wondering is there a way to do that?
and one thing since d-link is an wirless acess point can i use it instead of usb dongle to crack wep ?i have permisson like i said before. any info would be helpeful. thanks man
i gooogle that and search in fourms too much but can't find answers for those question.
i'm familiar with BT3,BT4 prefinal ,BT4 final,unbunte,ophcrack.
before i finish on bt3 i got pwr in airodump-ng and in bt4 pre final but in bt4 it's zero why?is there anything to do to fix that? i have driver zd1211rw.
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8:44
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remote-exploit & backtrack
i have d-link dwl 2100 ap connected to biquied patch using low-loss coxial cable it works like charm can this be done to usb dongle so that i can put the antenna which comes with the dongle far to get better range or to extend it.if yes how long the coxial cable should be.the usb dongle gives 17dbm connected 2 dbi omni antenna.?
if that can't be done.i have d-link dwl-2100 ap it acts as repeater also but thing is that you should put the root wep. i need to crack the root acess point wep.using my acess point as repeater then seat near my acess point with dongle connected to laptop.i have permission from my uncle(the root acess point is for my uncle) to do that.i wanna do this for eductianal perpose only. not for illegeal activites so i'm wondering is there a way to do that?
and one thing since d-link is an wirless acess point can i use it instead of usb dongle to crack wep ?i have permisson like i said before. any info would be helpeful. thanks man
i gooogle that and search in fourms too much but can't find answers for those question.
i'm familiar with BT3,BT4 prefinal ,BT4 final,unbunte,ophcrack.
before i finish on bt3 i got pwr in airodump-ng and in bt4 pre final but in bt4 it's zero why?is there anything to do to fix that? i have driver zd1211rw.
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9:11
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remote-exploit & backtrack
provato a recuperare la key in modo senza cliente ( dati non sono reali ma precisi nei vari comandi)
airodump-ng -c 11 -b 00:1A:C1:15:BE:34 -w cap mon0
CH 11 ][ Elapsed: 3 mins ][ 2010-02-26 13:34
BSSID PWR RXQ Beacons #Data, #/s CH MB ENC CIPHER AUTH E
00:1A:C1:15:BE:34 -74 100 1986 0 0 11 54 . WEP WEP OPN 3
BSSID STATION PWR Rate Lost Packets Probes
fin qua tutto ok nessun clinte attacco chopchop
aireplay-ng -1 0 -a 00:1A:C1:15:BE:34 -h 00:E0:4C:05:1A:32 mon0 comando per associare
13:31:11 Waiting for beacon frame (BSSID: 00:1A:C1:15:BE:34) on channel 11
13:31:11 Sending Authentication Request (Open System) [ACK]
13:31:11 Authentication successful
13:31:11 Sending Association Request [ACK]
13:31:11 Association successful :-) (AID: 1)
fin qua tutto ok almeno secondo il mio parere.
aireplay-ng -4 -b 00:1A:C1:15:BE:34 -h 00:E0:4C:05:1A:32 mon0
13:31:29 Waiting for beacon frame (BSSID: 00:1A:C1:15:BE:34) on channel 11
^Cad 1502 packets...
Qui penso che ci sia un problema non avrebbe dovuto crearmi un finestra differente e poi confermare con Y invece e partita senza domandarmi niente e girare cosi all'infinito ?
avrebbe dovuto risponder cosi :
Read 165 packets...
Size: 86, FromDS: 1, ToDS: 0 (WEP)
BSSID = 00:14:6C:7E:40:80
Dest. MAC = FF:FF:FF:FF:FF:FF
Source MAC = 00:40:F4:77:E5:C9
0x0000: 0842 0000 ffff ffff ffff 0014 6c7e 4080 .B..........l~@.
0x0010: 0040 f477 e5c9 603a d600 0000 5fed a222 .@.w..`:...._.."
0x0020: e2ee aa48 8312 f59d c8c0 af5f 3dd8 a543 ...H......._=..C
0x0030: d1ca 0c9b 6aeb fad6 f394 2591 5bf4 2873 ....j.....%.[.(s
0x0040: 16d4 43fb aebb 3ea1 7101 729e 65ca 6905 ..C...>.q.r.e.i.
0x0050: cfeb 4a72 be46 ..Jr.F
Use this packet ? y
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17:23
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remote-exploit & backtrack
Salve ,Il problema e questo, volendo recuperare la key Wep con Gerix in modo (Wep Attacks no-client ) ottengo un errore quando invio il comando :
( Create The ARP packet to be injected on the victim access point) che mi da l'errore
Error opening /root/.gerix-wifi-cracker/*.xor "packetforge-ng --help" for help. [Failure]
esiste una soluzione? grazie
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6:30
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remote-exploit & backtrack
Hello i have one question.How can i check length of password or encryption wpa/wep/64/128/256bit.Tnx:confused:
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3:41
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remote-exploit & backtrack
hey,
I try for a long time to break the wep key, but the iv's go so slow, and i try to folow the tutorial in aircrack-ng web site under this title:
"i_am_injecting_but_the_ivs_don_t_increase"
but it's not help me at all
i understand that i need to fake AP or something like that with wpa_supplicant (even that the netwok is wep key)
i'm using BT4 final from cd
my card it's iwl3945 (i saw that more people have this problem with this card)
please help me.
thanks.
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14:25
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remote-exploit & backtrack
I made a prog which solves the problem of typing and tping in order to hack a WEP.I've heard about spoonwep etc but I've heard about bugs in backtrack 4.Of course this prog is much less important than spoonwep but it becomes extremely useful sometimes.
rapidshare link:
rapidshare.com/files/345976934/hak.tar
Open a terminal,go into /hak directory and type "make" without the brackets as root.Type hak as root as well.
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13:50
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remote-exploit & backtrack
Hey Leute!
Bin Linux noob ^^
habe mich (zu grob) in die wardriving welt eingearbeitet und habe auch vor mich diesbezüglich weiter zu bilden..
Aber ersteinma hab ich nur rumgespielt.
Habe versucht meinen router(linksys mit original fw, also kein openwrt) mit WEP verschlüsselung zu cracken.
Das haperte allerdings beim Packet Injection test. (0/30)
(benutze die Gerix GUI)
Wüsstet ihr was der grund sein könnte? Zwangsläfig am Chipsatz?
MfG.
Goldi
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8:51
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remote-exploit & backtrack
Hi Guy's !
I have some problems . Yesterday , I succesfully connected to my WEP netwerk.
But because WEP isn't that safe , i've switches to WPA .
No I Can't connect anymore.
I've tried:
/etc/init.d/networking start , it does some things, and then I do:
/etc/init.d/wicd start , to start wicd , then I can find my network. I've changed the advanced configuration of the network, and entered my WPA key.
(I've tried both options of WPA there , preshared key, and the other one, passphrase I think.)
When I click connect, it says: Validation authentification, and then is says:
'NOT CONNECTED'
I've tried alot! I Also tried the tut here, with the wpa_supplicant.conf file, but when I need to start dhcp , it says that it's not installed.
And I need a connection to install..
Really don't know what to do anymore :/. An1 can help?
I've tried to search the forums, but I really didn't find a solution.. sorry guys.
Thx!
EDIT: Owyeah, I was using a Netgear Wg111v2 , but now i'm using an Alfa AWUS036H . still no luck :(
EDIT: Got a working , wired connection now. Wanted to try the wpa_supplicant tutorial again (xploitz) , but still no luck :( . That's an old old tut voor Backtrack 2 I think. Can't get it working..
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22:44
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remote-exploit & backtrack
Hello,
I see lots of videos on how to hack WEP. Actually thats basically what i see on here and on other videos sites. My question is. Whats next? After you hack the victims WEP. Then what do you do. Ok you have there password. So whats the big deal to get there password to access there internet?
I dont see any other videos for this next feture. All i see is how to hack wep. Can someone tell me whats next so i can start to do some research please.
I did see a video that someone took over there computer and i seen a video something about a social network hack ( not sure if thats correct way of saying it though ) But whats next after you hack there wep key
thanks
Big Mike
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22:44
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remote-exploit & backtrack
Hello,
I see lots of videos on how to hack WEP. Actually thats basically what i see on here and on other videos sites. My question is. Whats next? After you hack the victims WEP. Then what do you do. Ok you have there password. So whats the big deal to get there password to access there internet?
I dont see any other videos for this next feture. All i see is how to hack wep. Can someone tell me whats next so i can start to do some research please.
I did see a video that someone took over there computer and i seen a video something about a social network hack ( not sure if thats correct way of saying it though ) But whats next after you hack there wep key
thanks
Big Mike
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15:06
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remote-exploit & backtrack
so i cracked a wep with bt4 and is right and all but now i try to connect with my laptop ( the computer i cracked the wep key with ) and it doesn't ask me for the wep it just says troubleshoot etc BTW I'm using windows 7 ultimate 64-bit if that makes any difference.
I tried it on another computer and i can connect fine so I don't know what's going on it doesn't even asks me for the wep key... If anyone knows whats going on or you need more info I can provide.
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11:39
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remote-exploit & backtrack
I am trying to crack my own WEP enabled AP, it's only plugged in to the wall and has no clients connected and no internet connection.
I seem to be having some problems with cracking of wep with no clients as I keep getting deauthentication packets when trying the fragmentation attack. I am using an ALFA AWUS0368H with the patched r8187 driver.
Start Airmon in monitor mode
Lock on to target AP
Send fake auth
Quote:
11:11:52 Sending Authentication Request (Open System) [ACK]
11:11:52 Authentication successful
11:11:52 Sending Association Request [ACK]
11:11:52 Association successful :-) (AID: 1)
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Next I try the fragmentation attack
Quote:
Saving chosen packet in replay_src-0127-112629.cap
11:26:34 Data packet found!
11:26:34 Sending fragmented packet
11:26:35 No answer, repeating...
11:26:35 Trying a LLC NULL packet
11:26:35 Sending fragmented packet
11:26:37 No answer, repeating...
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Then I try another packet:
Quote:
Saving chosen packet in replay_src-0127-112923.cap
11:29:33 Data packet found!
11:29:33 Sending fragmented packet
11:29:35 No answer, repeating...
11:29:35 Trying a LLC NULL packet
11:29:35 Sending fragmented packet
11:29:35 Got a deauthentication packet!
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Then I try and reauth
Quote:
11:33:19 Sending Authentication Request (Open System) [ACK]
11:33:19 Authentication successful
11:33:19 Sending Association Request [ACK]
11:33:19 Got a deauthentication packet! (Waiting 3 seconds)
11:33:22 Sending Authentication Request (Open System)
11:33:24 Sending Authentication Request (Open System)
11:33:26 Sending Authentication Request (Open System) [ACK]
11:33:26 Authentication successful
11:33:26 Sending Association Request [ACK]
11:33:26 Got a deauthentication packet! (Waiting 5 seconds)
11:33:31 Sending Authentication Request (Open System)
11:33:33 Sending Authentication Request (Open System)
11:33:35 Sending Authentication Request (Open System) [ACK]
11:33:35 Authentication successful
11:33:35 Sending Association Request [ACK]
11:33:35 Association successful :-) (AID: 1)
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9:46
»
remote-exploit & backtrack
Bonjour,
Voila je vous explique j'aimerais savoir si il est possible a partir de la clé WEP d'une Neufbox de trouver la clé WPA sachant que la clé WEP est le début de la clé WPA chez neuf, serait-il possible de le faire par bruteforce ? Si oui auriez vous un tutoriel a me conseiller ?
Je vous remercie d'avance
Squall56
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20:03
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remote-exploit & backtrack
i have cracked wep key and i have the key. i was connected in this for 5 months but now i can't connect to router. when i try to connect it doesn't ask me for key is wep. i see other users connect from mac adresses. i try to connect from a laptop one friends but the same thing. the mobile too. what i can do.? the encryption is wep and the auth it was open but from the day i can't connect auth is empty as i see from linux. i'm taking datas and i cracked again and i found the key it's the same.tell me some ways to connect i have and the routers username and password. there is another way to connect? windows or linux??
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11:27
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remote-exploit & backtrack
Hi
I've only been using BT4 for a few days. I've managed to crack a few WEP keys and Ive managed to read around most subjects but I'm struggling with one aspect.
I'm using the simple WEP crack tut from aircrack-ng site
I dont have problem injecting the packets the problem seems to be capturing them then cracking them
OK the command I use is
airodump-ng -c 9 --bssid 00:14:6C:7E:40:80 -w output wlan0
I sometimes get this output
CH 9 ][ Elapsed: 8 mins ][ 2007-03-21 19:25
BSSID PWR RXQ Beacons #Data, #/s CH MB ENC CIPHER AUTH ESSID
00:14:6C:7E:40:80 42 100 5240 178307 338 9 54 WEP WEP teddy
BSSID STATION pew lost pac's
00:14:6C:7E:40:80 00:0F:B5:88:AC:82 42 0 183782
I dont have a problem when there is one station the problem's I have is when more than one station is attached to the BSSID. Sometimes six. I can inject packets to one station but not them all. Although I can see the packets on that station being injected above the station list the total does not climb.
Hoping someone can understand what I mean
Thanks in advance
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19:09
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remote-exploit & backtrack
I am trying to crack a wep and i did the first few steps..
My last command was "airmon-ng start wlan0" and it took a few seconds and the it says "monitor mode enabled on mon0"
What do i need to do?? im really confused, and i haven't seen anybody else with this outcome after this command. here is my setup.
Backtrack 4
IPW 3945abg wireless card.
Im not that great with this stuff yet, so it would be great if somebody would get me on my feet from here and a step by step tut.
Thanks in advance.
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15:04
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remote-exploit & backtrack
I´m stuck on cracking a wepkey on an AP.
I did this a lot of times..
but this time
fragmentation attack won´t work
chopchop attack won´t work
is there another way?
What can cause this?
