本帖最后由 smilebomb 于 2010-1-14 23:09 编辑 3 i7 ~0 P, x# I6 J
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7 \% i' N* H/ q; _* W9 d2 ycoWPAtty for Windows MAIN:8 g `% y/ {2 d" z8 w5 q
"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol."$ F- h0 f/ Z; i0 t4 @
- Joshua Wright.+ i& D7 Z2 q2 o* e% T9 n
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Project Homepage: http://www.willhackforsushi.com/Cowpatty.html R4 J: `& r* s# B( H7 s
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Local Mirror: Cowpatty-4.0-win32.zip+ G3 H0 n( `0 ^
MD5: aa9ead2aacfcc493da3684351425d4c6 5 u- c j2 z8 u# L/ q- ^0 x
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; U6 f/ t. t( H, d' RcoWPAtty Dictionary Attack 3 q- f; E! E4 N$ C( w g; R( T$ k( d/ E2 e& }
Precomputing WPA PMK to crack WPA PSK + t6 t; S5 }$ y1 K% ]2 T+ G' O, {8 r, E0 O$ W# o- {
coWPAtty Precomputed WPA Attack ' m% S+ U( k1 R) Z
coWPAtty Recomputed WPA2 Attack + H+ d* V- T3 \7 P: {5 ^- ]# ~2 N7 B
coWPAtty Tables w$ ?7 R5 x2 E! x! U
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, S) N& n; f3 h9 p/ X9 V2 \2 q coWPAtty Dictionary Attack:: v0 F/ ]1 U0 J3 Q6 Z1 x5 n, ?9 U2 f) g+ G
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.
+ s7 q5 `5 ]7 e. E6 A3 wIn 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.
# a7 B4 m Q; ]7 N0 Ccowpatty -f dict -r wpapsk-linksys.dump -s linksys
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6 ~' r% ~) n( f: B$ B7 D) KAs 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
: [, [0 ^* t: T# fwpapsk-linksys.dumpis the capture containing the four-way handshake
: D0 O/ F5 c! j H2 O' @+ sdict is the password file
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linksys is the network SSID ! |0 I0 S2 r/ X3 \9 ?" Y
; U3 X! H/ m5 {+ sPrecomputing WPA PMK to crack WPA PSK:
T7 ]2 G: N& B3 o* ^1 ]+ qgenpmkis 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$ p2 n7 J% |( A a: P# l, H
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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 ?
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$ H$ O( r# f5 h. K) Ogenpmk -f dict -d linksys.hashfile -s linksys . b! C3 D6 L+ t$ \' t! e1 ?1 a
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* [0 @; ?, z, E5 l0 p- u dict is the password file ' E, R7 R i- f$ i' W$ S7 Y& e! X3 g3 p( L: b' }& A$ ]1 {# z$ O
linksys.hashfile is our output file ( E7 _$ F' x( g) W! a; `" o3 V& X @0 O6 g& ~+ M8 I( L1 I
linksysis the network ESSID . O0 N4 y; {. P( _* ^; j
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coWPAtty Precomputed WPA Attack:- z5 |# j1 r d. P+ C- q! F2 F0 B8 C- j
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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1 G- }4 o+ Z& i' U3 X0 @2 tcowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys
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wpa-test-01.capis the capture containing the four-way handshake $ U5 L9 g: Q8 }) Z/ f# j- f
linksys.hashfile are our precomputed hashes : x" E Y. h; I: ?3 a) x E8 q* p1 \/ m. ~) j, [" B) Z e4 a
linksys is the network ESSID / r8 G" Q( _+ M/ N( x% R Y1 t
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Notice 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. 6 F& P: [1 b/ q+ b6 c$ x
8 P6 O2 u8 l8 r8 x6 Q5 ?coWPAtty Precomputed WPA2 Attack:
1 S# ^+ J0 W+ O& ~2 ?) f% \# J+ ~* ncoWPAtty4.0 is also capable of attacking WPA2 captures. Note: The same hashfile as was used with the WPA capture was also used with the WPA2capture. 9 a) V8 P0 h0 C+ P
cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys
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wpa2psk-linksys.dumpis the capture containing the four-way handshake % ^8 N- ?1 W$ J+ {- Z
dict is the password file
; l' i( i2 m+ X+ Hlinksys is the network SSID
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coWPAtty Tables:" q# T+ c, n. p; [+ W
- ?) Z2 Y* l4 R0 h# u+ ^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:
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* a: @/ T/ x! M, q! F; uhttp://torrents.lostboxen.net/co ... atty-4.0_2006-10-19/ p+ G7 n" D4 e8 ]0 E. V; @# L: j$ ^# A8 V: U. E- i
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% T' H7 F" Q/ T; H& T6 cA 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/
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7 X+ T7 t& X O) x) ?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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