本帖最后由 smilebomb 于 2010-1-14 23:09 编辑 / f7 p. b7 ~; n$ ]0 b# g1 A
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5 W0 j0 B0 U6 e& Q0 I# U# s" ecoWPAtty for Windows MAIN:
0 ^% A6 k9 V2 @7 ` "coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol."
! H5 T, ^5 p& V5 W, e) y- Joshua Wright.
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! p& g, [; f% N: O8 h Project Homepage: http://www.willhackforsushi.com/Cowpatty.html R4 J: `& r* s# B( H7 s
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% @0 d6 I# F' F+ }Local Mirror: Cowpatty-4.0-win32.zip
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/ O4 ^1 {. s+ M! i; PcoWPAtty Dictionary Attack
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6 }8 H1 O8 r" ?# fPrecomputing WPA PMK to crack WPA PSK + t6 t; S5 }$ y1 K% ]' z. [& L) \6 n7 h. l) f
coWPAtty Precomputed WPA Attack
" H/ A3 _) S. g! ~: _0 i: U+ L7 AcoWPAtty Recomputed WPA2 Attack
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coWPAtty Tables w$ ?7 R5 x2 E! x! U
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coWPAtty Dictionary Attack:, W1 [2 D& ^5 |# |" W; F; s- x2 d
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. : h9 [1 M$ \ E3 c% a' [5 D3 v: H
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. 4 D7 b2 U& g! {, e4 o
cowpatty -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
; g5 W: x+ b$ f- ]" Cwpapsk-linksys.dumpis the capture containing the four-way handshake 2 [# T& X% f. i0 m2 ~! `
dict is the password file
3 R X1 @6 D- L8 ylinksys is the network SSID
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# A( ~* n& i; ~9 n; N- x* uPrecomputing WPA PMK to crack WPA PSK:
8 G4 C- {4 U& \- v8 _: Hgenpmkis 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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5 e/ o) B5 k8 \6 ~6 {% T3 YSo to generate some hash files for a network using the SSID cuckoo we use: 7 @) @# C* G* b6 c6 L X3 w) i4 ?6 E; Y( Y3 p: e$ N- U
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genpmk -f dict -d linksys.hashfile -s linksys
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2 B( Z6 d5 C# @8 z9 | dict is the password file ' E, R7 R i- f$ i' W$ S7 Y& e! X
# S5 z+ ^% S6 f0 I2 Mlinksys.hashfile is our output file ( E7 _$ F' x( g) W! a; `" o
$ e" p. K* y9 w4 tlinksysis the network ESSID
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coWPAtty Precomputed WPA Attack:- z5 |# j1 r d
( y+ l$ S& i/ ~6 P, n0 s, C( R, QNow 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.
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; e% ~$ U# P) Gcowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys 3 m( L, m5 l( s7 J8 K( Q$ g& B- k
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wpa-test-01.capis the capture containing the four-way handshake
+ }$ u! ?) h4 o* V2 R7 P+ Glinksys.hashfile are our precomputed hashes
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/ e! g2 Q/ M; plinksys is the network ESSID 3 \, T$ z; Y' @! ?
) P# o- _0 Y! R$ ^ d& hNotice 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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. [3 {& M1 | |8 u# f+ acoWPAtty Precomputed WPA2 Attack:0 D ~0 v% k( d* C0 @
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.
; V6 e4 g3 h: l' p: Q; f& w+ `cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys
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wpa2psk-linksys.dumpis the capture containing the four-way handshake : V2 ?- _% M9 ]8 G" @ t4 d
dict is the password file
+ w' a6 j# w+ b* Klinksys is the network SSID
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coWPAtty Tables:" q# T+ c, n. p; [+ W; \3 f* c$ f* [$ M
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:! Z K+ V) \5 |& z7 G& p2 H- I
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A 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/. R( @& B0 h* k" C
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1 e2 d" E+ @( f; p$ p+ UOr you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/ |