本帖最后由 smilebomb 于 2010-1-14 23:09 编辑
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coWPAtty for Windows MAIN:7 S! K1 o B9 u7 w' L
"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol."
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9 \5 t5 a, z- D8 K 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) N2 C9 o, a; `3 k8 x6 u
MD5: aa9ead2aacfcc493da3684351425d4c6 ' O/ ?9 r( w' v5 ?
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coWPAtty Dictionary Attack 3 q- f; E! E4 N$ C( w g; R+ F- S6 a j4 Y' D. } P
Precomputing WPA PMK to crack WPA PSK + t6 t; S5 }$ y1 K% ]! v. `8 P, y3 J6 v
coWPAtty Precomputed WPA Attack
+ |: z$ N& i% u0 D( [6 CcoWPAtty Recomputed WPA2 Attack
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coWPAtty Tables w$ ?7 R5 x2 E! x! U
9 _+ y) S* `2 n/ S+ O! JcoWPAtty Usage:6 ~$
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coWPAtty Dictionary Attack:: U; t1 r$ n, B* i
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.
6 w9 D, Q! r4 X( v ^, @5 B |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.
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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
( T6 u+ }. L1 H9 W O9 Twpapsk-linksys.dumpis the capture containing the four-way handshake & G9 H7 q8 ^# Z" w; t- V
dict is the password file
+ _5 F6 y- t/ V% nlinksys is the network SSID
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Precomputing WPA PMK to crack WPA PSK:
- J4 F D+ j2 l) H, B% Agenpmkis 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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3 H, w; e5 c2 l8 j# ~) MSo to generate some hash files for a network using the SSID cuckoo we use:
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genpmk -f dict -d linksys.hashfile -s linksys 8 i6 r, K8 X* @7 L
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dict is the password file ' E, R7 R i- f$ i' W$ S7 Y& e! X* B3 Z3 m- }! _3 Y) b! D0 k8 |
linksys.hashfile is our output file ( E7 _$ F' x( g) W! a; `" o. {2 \9 D/ y$ Y+ j
linksysis the network ESSID / d# F- K% Q4 B: j/ ?: f
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% V/ s) ^$ t' q$ _& w9 t7 }coWPAtty Precomputed WPA Attack:- z5 |# j1 r d/ t" n" r0 r& x: J. S
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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8 ?& t9 q5 x+ i* x" y; o1 B6 H1 G1 Ncowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys # C, C3 X; s) H$ J6 W: k
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! u$ S2 d0 ^: {. qwpa-test-01.capis the capture containing the four-way handshake ) q3 W1 h6 r0 e8 y( B
linksys.hashfile are our precomputed hashes : x" E Y. h; I: ?3 a) x% a2 a0 d4 m: b: E+ ]9 A
linksys is the network ESSID 3 L h2 {9 [6 t1 v, k2 T
: ^" k5 u/ B: {* I& cNotice 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. 7 Q) g. P0 @" E( V0 N: ] D8 W
7 ~3 v5 b |; E: JcoWPAtty Precomputed WPA2 Attack:
+ ^- ^2 g8 g9 @1 m2 d4 LcoWPAtty4.0 is also capable of attacking WPA2 captures. Note: The same hashfile as was used with the WPA capture was also used with the WPA2capture.
! O8 l7 {$ R) bcowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys
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wpa2psk-linksys.dumpis the capture containing the four-way handshake / I. ]+ j$ {, f( T
dict is the password file
! e8 `9 y) i+ B3 X' M: Ilinksys is the network SSID
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5 E7 r. ^+ s* `4 f6 CcoWPAtty Tables:" q# T+ c, n. p; [+ W- o+ [2 ~2 u2 b0 r4 f6 m# t; R
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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( J" ~1 Z2 m4 i; g' |http://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:6969/8 M5 a- J' P4 ^( }% W0 {% o: M% s
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2 r( H# c& x" V6 ~: i# zOr you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/ | 
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