本帖最后由 smilebomb 于 2010-1-14 23:09 编辑
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2 M' i5 c! _ DcoWPAtty for Windows MAIN:
: S9 C: `% f/ G6 @1 ] "coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol."# \6 t( Z4 H9 |# t$ g% X% v# e
- Joshua Wright.
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Project Homepage: http://www.willhackforsushi.com/Cowpatty.html R4 J: `& r* s# B( H7 s; i4 T3 R8 P$ u- T+ K8 Y
5 P; F/ D6 w7 z) m3 x( T4 f6 x4 ?; kLocal Mirror: Cowpatty-4.0-win32.zip5 e7 {4 G' Z2 ~7 h) P0 c H8 S
MD5: aa9ead2aacfcc493da3684351425d4c6 / z# l- N' F' X" u0 Z/ Y
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coWPAtty Dictionary Attack 3 q- f; E! E4 N$ C( w g; R
; `4 }' X0 [) S% X0 tPrecomputing WPA PMK to crack WPA PSK + t6 t; S5 }$ y1 K% ]5 C2 O5 f$ x6 w0 C" w9 Q
coWPAtty Precomputed WPA Attack 6 f% b0 ?0 Z) Y* j% \$ X1 J+ G5 E; w
coWPAtty Recomputed WPA2 Attack + H+ d* V- T3 \
$ k- Y' U( J4 Y# IcoWPAtty Tables w$ ?7 R5 x2 E! x! U
( e# o( E4 J0 {' ]coWPAtty Usage:6 ~$
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- ~$ u' Z/ T. ^& k. h1 U0 }; g coWPAtty Dictionary Attack:
' R% j% \/ ]0 U, m. sToperform 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. p, I+ O: M+ |1 a. g1 b4 l
In 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.
9 N! `, G; @/ l* y# x2 Ocowpatty -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 Q
5 b+ O# R9 w2 G/ M7 W) F! o0 H: kwpapsk-linksys.dumpis the capture containing the four-way handshake 9 e# j' ~# X" w7 W0 g p
dict is the password file * o. k" |: ]# p' _/ s
linksys is the network SSID 4 L' m5 N+ I( f+ ]" k) q
; f: v/ u+ i; h! CPrecomputing WPA PMK to crack WPA PSK:
% j" }3 o2 ?7 r" }! Z/ d! Cgenpmkis 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. - e/ ]0 O6 r( ?8 q
7 ` d! V& Z6 K: `( }6 [So to generate some hash files for a network using the SSID cuckoo we use: 7 @) @# C* G* b6 c6 L X3 w) i4 ?
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genpmk -f dict -d linksys.hashfile -s linksys 5 z% `0 }) L& Y& t2 u
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0 |) G5 {/ S$ D" M% V! e+ { dict is the password file ' E, R7 R i- f$ i' W$ S7 Y& e! X
& ]* Q8 N7 L' A- _, @linksys.hashfile is our output file ( E7 _$ F' x( g) W! a; `" o. p6 J8 d, o" M% `* I4 _
linksysis the network ESSID I- a. l2 U# c( p
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, ]1 p$ \( F, @3 q9 {coWPAtty Precomputed WPA Attack:- z5 |# j1 r d
! y: a3 h" L! c3 _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, l2 N: i: ?( ~% ?1 `% K
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cowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys 6 H4 x _5 W, A }2 d
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- ?7 Z6 z" r( s' N" ]) x, qwpa-test-01.capis the capture containing the four-way handshake 1 f1 N+ j- F3 Z2 }9 a. v- }5 K4 E% n
linksys.hashfile are our precomputed hashes : x" E Y. h; I: ?3 a) x$ J, W- r' x* \7 A& |8 Q" u
linksys is the network ESSID Y9 @- c; f8 V
( A) m" X/ m7 O3 ZNotice 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. 5 M- ]" Z9 e* d& w( L
* [2 Y* M1 Q1 J" A" g3 T2 ^coWPAtty Precomputed WPA2 Attack:2 ^) o; S6 ~) n0 O
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.
8 }8 T/ E- n0 j7 e. Vcowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys
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wpa2psk-linksys.dumpis the capture containing the four-way handshake ( B7 ^0 z$ {9 s6 w9 h
dict is the password file ) ?4 H& C" ]5 n$ E3 A V
linksys is the network SSID # [8 l& Y$ V( f$ ?4 v0 ]/ d9 z4 d- P2 |
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4 }- B* [8 T/ N6 C% H+ XcoWPAtty Tables:" q# T+ c, n. p; [+ W6 q+ i% y' H# t8 g* x3 S* e8 R) S K
The 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:( n# y& k2 ^5 O3 ~% y
2 p0 [/ N" _# Ahttp://torrents.lostboxen.net/co ... atty-4.0_2006-10-19/ p+ G7 n" D4 e8 ]0 E. V
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A 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/7 t; X% F# T5 x8 I
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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/ | 
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发表于 2010-1-10 01:59
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