本帖最后由 smilebomb 于 2010-1-14 23:09 编辑 9 k* s) D8 b. b* C( ~0 u
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coWPAtty for Windows MAIN:8 E4 d' J% h# \+ q5 |! F4 E
"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol."
) p; `: h: B' @0 o8 T: F/ K- Joshua Wright.
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Project Homepage: http://www.willhackforsushi.com/Cowpatty.html R4 J: `& r* s# B( H7 s$ J9 A3 n3 f* G, n
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Local Mirror: Cowpatty-4.0-win32.zip
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coWPAtty Dictionary Attack
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& Q9 _1 ]6 }' G. z: f* P) EPrecomputing WPA PMK to crack WPA PSK + t6 t; S5 }$ y1 K% ]5 `7 c' w" K7 x u4 e2 Q
coWPAtty Precomputed WPA Attack
" f7 |& a! r# p( j0 PcoWPAtty Recomputed WPA2 Attack
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) { Z$ F- P" ?; x& l8 i, mcoWPAtty Tables w$ ?7 R5 x2 E! x! U
; g- U# V2 s3 m5 VcoWPAtty Usage:6 ~$
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* x( U q$ G# F2 P coWPAtty Dictionary Attack:6 e* L0 [; Y/ {- D$ J2 `' C
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. 8 T- H1 ?% ~9 |2 O) R' f. ^' F
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.
[' c! l6 c: F5 ` Scowpatty -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# \" o R6 }" S7 x e
wpapsk-linksys.dumpis the capture containing the four-way handshake & X, L9 D# Y# s7 o
dict is the password file 0 ~# M+ J/ L! `( N) v. R! N
linksys is the network SSID
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Precomputing WPA PMK to crack WPA PSK:8 M b! K2 r/ H( [* X+ |
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:
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2 p. _7 V+ i' ^6 N$ Mgenpmk -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
]6 Q% M5 n: \' g2 Alinksys.hashfile is our output file ( E7 _$ F' x( g) W! a; `" o9 d, \* D' X; \; v. @ y L& W' y& z
linksysis the network ESSID 8 x3 d, A7 H6 ]$ T/ v+ w) d
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' r8 V' Q8 H- w# |+ c+ ^, C( zcoWPAtty Precomputed WPA Attack:- z5 |# j1 r d# Q+ V* f, }. X) i
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 I3 G) l i# K1 Z
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cowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys ; p) T/ i1 l+ \8 c( i0 O; @" \
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wpa-test-01.capis the capture containing the four-way handshake . g. F! t9 g/ P% a0 }4 C2 k; n: s
linksys.hashfile are our precomputed hashes : x" E Y. h; I: ?3 a) x
! N) ?' [; E: G$ a" vlinksys is the network ESSID
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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.
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coWPAtty Precomputed WPA2 Attack:
& A7 o% s$ M- l! A j: H; FcoWPAtty4.0 is also capable of attacking WPA2 captures. Note: The same hashfile as was used with the WPA capture was also used with the WPA2capture.
% r: _2 [1 V/ j8 d: G; zcowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys
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wpa2psk-linksys.dumpis the capture containing the four-way handshake % L5 o5 z' R% W+ d2 G2 f. F/ t# |
dict is the password file & o( z. Y0 v! X
linksys is the network SSID # [8 l& Y$ V( f$ ?4 v ?. s& [0 Z3 T' ?8 e- Z. A
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" E! t2 N6 Y' K UcoWPAtty Tables:" q# T+ c, n. p; [+ W
2 _7 V O' I% Z/ _" F1 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:' o2 e$ ~5 _8 _6 o
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5 _# }$ ~, @* o, h, }9 CA 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/ | 
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