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coWPAtty for Windows MAIN:; S; m, t( [/ `. e, Z# r! I3 T) S
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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. - Q$ o0 J9 H* H+ W) V0 r
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! ]$ S5 U- r# H- r) n# CProject Homepage: http://www.willhackforsushi.com/Cowpatty.html
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9 m! D9 _0 b# a: sLocal Mirror: Cowpatty-4.0-win32.zip MD5: aa9ead2aacfcc493da3684351425d4c6( g0 G; [; P3 b; a
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7 b1 l5 n* v4 R N R. j0 j% K2 l. ~/ mcoWPAtty Dictionary Attack; s2 j. M. r! M3 p0 c
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5 C/ j/ o! A, H; z6 OPrecomputing WPA PMK to crack WPA PSK! P# \: e9 S0 {! \' d n( N
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coWPAtty Precomputed WPA Attack
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coWPAtty Recomputed WPA2 Attack
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coWPAtty Tables
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coWPAtty Usage:7 b, W( \( k$ \! _2 B \" [! a6 T
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% D% I8 m5 g( P6 W- [( _( acoWPAtty Dictionary Attack: ?6 s5 J5 `5 C
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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.4 e+ a+ D T' h5 D
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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.: D8 _/ V( L( {
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) k u8 T( x% d2 ^- T# L# acowpatty -f dict -r wpapsk-linksys.dump -s linksys
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& v7 q/ L0 O, X% @) yAs 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).: g8 i& m! @4 a7 O1 n8 D9 w
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& D' k9 C1 ^- A8 n% wwpapsk-linksys.dump is the capture containing the four-way handshake
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i+ v, u1 W- I8 P+ `: Kdict is the password file
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" O3 e5 v/ W& n5 @; t/ oPrecomputing WPA PMK to crack WPA PSK:3 n( L3 r5 q8 h9 V; w0 _& N
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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.
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- i, {5 n. S: o; U1 tSo to generate some hash files for a network using the SSID cuckoo we use:2 }1 X0 y# c `4 N! G- ?
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( @ Z# ?. y9 f* k) L4 h' O4 Z. _genpmk -f dict -d linksys.hashfile -s linksys " }; ^) W7 b# Y- z$ ? {
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l, }% z, s6 x V. y: `1 }linksys.hashfile is our output file
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- b- m+ Y& Z9 J' a7 HcoWPAtty Precomputed WPA Attack:
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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.. k: M& j. V. T5 ]6 X! a; a
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cowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys / w. l+ [5 ]- ^2 |7 a6 r( v
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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# ^5 @ I/ Q1 Z' X: R
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' b8 m0 k9 e8 b7 p Q6 Qlinksys is the network ESSID
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% P5 ^# a- [ P6 M& {2 o' M) _, j) bNotice 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.* ]! R+ ^ t# |- ~* ?1 ]
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coWPAtty Precomputed WPA2 Attack:
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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.
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cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys( |+ ?7 r% @- f! c
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wpa2psk-linksys.dump is the capture containing the four-way handshake
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dict is the password file4 I6 E! A9 U( f
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linksys is the network SSID
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( y2 G, h m; E' H: ]5 L/ v- h( F. x5 [coWPAtty Tables: ) ^4 o }: \& d" u& k
& q8 Y" N' L. i( XThe 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:. d g$ F0 Y. U `5 ^/ o5 z
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$ c3 J* J! t% A- D0 B. k qhttp://torrents.lostboxen.net/co ... atty-4.0_2006-10-19$ x- v6 z* \, R2 Z0 M4 L, ] x, l2 {: F
9 `7 C+ E" }4 l# }$ g/ V1 g( @2 _ H% I, BA 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/5 J G# p0 f8 p4 `$ g8 L1 H8 c; ?; O9 e$ |5 O9 p% s
0 Q; f+ o- S% l& D6 z% R! @; `) {5 [Or you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/, n0 k" `: w- q/ u
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