本帖最后由 smilebomb 于 2010-1-14 23:09 编辑 ; H7 g% R; m7 [) ?
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coWPAtty for Windows MAIN:, u" s* C- t j, w( @3 v" {
"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol." j3 ]8 o8 b* B5 w
- Joshua Wright.4 L! v9 U3 O5 G4 n! l
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Project Homepage: http://www.willhackforsushi.com/Cowpatty.html R4 J: `& r* s# B( H7 s
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8 k# W7 o( j2 ]( {; FLocal Mirror: Cowpatty-4.0-win32.zip
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coWPAtty Dictionary Attack 3 q- f; E! E4 N$ C( w g; R
+ S* S8 k# J1 vPrecomputing WPA PMK to crack WPA PSK + t6 t; S5 }$ y1 K% ]
( y0 Z$ C" ]9 |. r& s6 gcoWPAtty Precomputed WPA Attack
/ v4 g. S! w' R* m! M. J" VcoWPAtty Recomputed WPA2 Attack
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coWPAtty Tables w$ ?7 R5 x2 E! x! U
5 X( w/ t0 ^6 F5 i3 f9 p5 ocoWPAtty Usage:6 ~$
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4 H* y+ Q2 h5 E# ? coWPAtty Dictionary Attack:6 P7 U' `) b2 `2 c/ h
Toperform the coWPAtty dictionary attack we need to supply the tool witha capture file that includes the TKIP four-way handshake, a dictionaryfile of passphrases to guess with and the SSID for the network.
5 W/ B) q( g9 V3 U gIn orderto collect the four-way handshake you can either wait until a clientjoins the network or preferably you can force it to rejoin the networkusing tools like void11 or aireplay and capture the handshakes usingsomething like kismet, ethereal or airodump.
0 [# X! B' U9 C) J/ ccowpatty -f dict -r wpapsk-linksys.dump -s linksys
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As youcan see this simple dictionary attack took 51 seconds, we can speed upthis process by precomputing the WPA-PMK to crack the WPA-PSK (seebelow). 0 d4 E6 I Y, L7 |% n5 j6 Y3 w8 Q3 K2 _5 _3 B ^7 _- O
wpapsk-linksys.dumpis the capture containing the four-way handshake % e# b+ G" Z5 ?3 C: B1 n
dict is the password file
, g3 m9 E. n( A5 rlinksys is the network SSID
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; ?3 q+ x6 r: O9 G* kPrecomputing WPA PMK to crack WPA PSK:. T! b( Q+ N ]) k9 \0 g( _
genpmkis used to precompute the hash files in a similar way to Rainbow tablesis used to pre-hash passwords in Windows LANMan attacks. There is aslight difference however in WPA in that the SSID of the network isused as well as the WPA-PSK to "salt" the hash. This means that weneed a different set of hashes for each and every unique SSID i.e. aset for "linksys" a set for "tsunami" etc.
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So to generate some hash files for a network using the SSID cuckoo we use: 7 @) @# C* G* b6 c6 L X3 w) i4 ?- z$ R1 Q+ W: g% V* Q% L% \
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- Q, e% v0 [4 x4 B( e/ U" sgenpmk -f dict -d linksys.hashfile -s linksys
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dict is the password file ' E, R7 R i- f$ i' W$ S7 Y& e! X
& k% b3 L2 `% r1 A* ilinksys.hashfile is our output file ( E7 _$ F' x( g) W! a; `" o
0 z9 P9 U4 l# ^( Hlinksysis the network ESSID ' k+ l+ s+ ~# `7 u
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coWPAtty Precomputed WPA Attack:- z5 |# j1 r d% V7 K) d" B& a
Now wehave created our hash file we can use it against any WPA-PSK networkthat is utilising a network SSID of cuckoo. Remember the capture(wpa-test-01.cap) must contain the four-way handshake to be successful. 3 u1 d; w& R \; l0 n. N* {# \8 I
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% C! k+ C7 W& N5 s* \cowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys 1 W/ H. o" o) H3 J9 G
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9 v% ^% w4 \, q' X& I% i8 Z; U Dwpa-test-01.capis the capture containing the four-way handshake l2 k, \# @) G7 r6 \0 O
linksys.hashfile are our precomputed hashes : x" E Y. h; I: ?3 a) x
/ L- c" ]9 l4 L0 a0 D6 @linksys is the network ESSID
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0 o8 R: y/ }9 h, C/ INotice that cracking the WPA-PSK took 0.04 seconds with the pre-computed attacked as opposed to 200 secondswith standard dictionary attack mode, albeit you do need to pre-computethe hash files prior to the attack. However, precomputing large hashfiles for common SSIDS (e.g. linksys, tsunami) would be a sensible movefor most penetration testers.
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& d3 y2 e5 b( M& V# e4 OcoWPAtty Precomputed WPA2 Attack:4 T+ }4 n4 `0 M' X
coWPAtty4.0 is also capable of attacking WPA2 captures. Note: The same hashfile as was used with the WPA capture was also used with the WPA2capture. + d+ D0 i8 p% j4 I+ p
cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys 1 U8 `% X. z6 j# ?; h

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wpa2psk-linksys.dumpis the capture containing the four-way handshake $ R5 g* ~4 I% z- F
dict is the password file
/ O% s0 J9 D* P# Q# Slinksys is the network SSID
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coWPAtty Tables:" q# T+ c, n. p; [+ W
1 u w! Y' b7 a. G0 Q( B3 IThe Church of Wifi have produced some lookup tables for 1000 SSID's computed against a 170,000 word password file. The resultant table are approximately 7 Gigabytes in size and can be downloaded via Torrent:* M- U3 M$ l# g7 m2 j- i
\0 _9 \0 X$ d9 R8 y! M3 \" ~http://torrents.lostboxen.net/co ... atty-4.0_2006-10-19/ p+ G7 n" D4 e8 ]0 E. V
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+ ?/ c4 e+ Z, M! w% V. i$ rA 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/
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Or you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/ |