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coWPAtty for Windows MAIN:
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"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol." - Joshua Wright.
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$ `2 q3 n& z0 i! A" _8 R8 ]3 tProject Homepage: http://www.willhackforsushi.com/Cowpatty.html
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Local Mirror: Cowpatty-4.0-win32.zip MD5: aa9ead2aacfcc493da3684351425d4c6
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coWPAtty Dictionary Attack, _ O- U0 _4 e: S) s
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Precomputing WPA PMK to crack WPA PSK
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coWPAtty Precomputed WPA Attack) D0 r4 S% q4 Q6 k( Q5 g# `
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coWPAtty Recomputed WPA2 Attack) k) D' D n5 _! u
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coWPAtty Tables- c( Y8 q+ f1 j; y' w
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# p6 L3 @) m2 ]+ N/ a D* @6 vcoWPAtty Usage:
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/ J& `) x" t1 z% jcoWPAtty Dictionary Attack:: u, g: R' Q( j- T5 Y i1 O1 g2 T
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, n2 f, Z1 |; R' u; ]6 H9 G, Y' EToperform 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.5 P& @% ]; I: }! D
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- R) h% Q! ]. v0 V/ D; zIn 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.; I$ E8 U3 [* F1 ~& K, q I2 {
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cowpatty -f dict -r wpapsk-linksys.dump -s linksys
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; G B. e: W& O ZAs 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)." K9 C9 U5 s7 ^3 O4 X9 ^
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wpapsk-linksys.dump is the capture containing the four-way handshake
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5 }, W# E% y9 h& G8 D8 Edict is the password file! E) i6 w0 ?% |+ U/ N8 Z' p
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' d- o; |& h- ^1 ?- ] f* Llinksys is the network SSID& k, v6 U" ^( O/ P! m: G k
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Precomputing WPA PMK to crack WPA PSK:
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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.( x- T; m6 \: @3 H( c; i
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So 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 E+ m# ?8 _5 _$ `/ ~0 ^
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3 r$ ^( a3 }2 f. \, I6 Cdict is the password file
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: u' n$ R, }/ U8 _; e+ ~ Jlinksys.hashfile is our output file
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linksys is the network ESSID9 i. N6 P' ` ^# M- Q- d; }
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, s3 Z% U3 k0 P& }# u3 S( P8 a% S% `0 r5 r( XcoWPAtty Precomputed WPA Attack:# ?/ x) d2 _& C+ W/ i) a: D* N; m G$ M
5 ?) F; e! H: BNow 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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% f% w9 a" ~) F' @2 \* K) c9 _cowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys
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wpa-test-01.cap is the capture containing the four-way handshake
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linksys.hashfile are our precomputed hashes# z# c/ g+ k7 n( c' o3 v
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linksys is the network ESSID# F3 f$ y, {. O
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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.9 ?+ a" |, d8 M; T% Q
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( d; t$ i: c& I, l7 c8 bcoWPAtty Precomputed WPA2 Attack:5 ~5 W& Q c; c0 B/ z6 c# X
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$ j3 y, b" Z; L8 i% VcoWPAtty4.0 is also capable of attacking WPA2 captures. Note: The same hashfile as was used with the WPA capture was also used with the WPA2capture.0 n K' T2 v' H5 g0 g5 E) u- Q
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cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys3 l) Q# `, E% W6 [- c
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& y# D5 O# z+ X% ^3 B! t; t) F5 owpa2psk-linksys.dump is the capture containing the four-way handshake3 D3 z8 }; b' ~" q/ X9 u# f/ T& S0 Y1 Z
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; r+ [& z2 m l! w5 j3 D& _0 Sdict is the password file: ]6 D7 x. e* ]3 B5 \# G
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linksys is the network SSID9 d ~5 C3 T% ]5 t6 R3 c/ k S
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7 ]+ @' c! `/ @4 IcoWPAtty Tables: + u6 c" {2 \4 G( b$ s0 }2 \, t, A
2 I; ], f: ~. u& `4 t, P8 gThe 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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& b$ N) ~/ X1 o- Ghttp://torrents.lostboxen.net/co ... atty-4.0_2006-10-19
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6 K$ G( h- F& z3 ~ w, u4 l% Y- E. {3 Z5 w9 B$ PA 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/1 P" V6 G( J9 W( d5 J# _3 q1 l) o/ ^
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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/. J% }2 r' B; I6 C+ ~; ` |
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