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coWPAtty for Windows MAIN:; S; m, t( [/ `. e, Z# r! I3 T) S% y. o+ u* o1 s$ n5 h' P
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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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Project Homepage: http://www.willhackforsushi.com/Cowpatty.html 2 f" W. D( C0 T5 I) W) S
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3 o0 A+ ~* P" y; wLocal Mirror: Cowpatty-4.0-win32.zip MD5: aa9ead2aacfcc493da3684351425d4c65 P; N; S8 n; i) M
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coWPAtty Dictionary Attack" s; k+ u$ K8 H8 a3 S4 [
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& Q$ i. \% Z: Y+ c5 [$ A* @Precomputing WPA PMK to crack WPA PSK
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coWPAtty Precomputed WPA Attack* K* n+ q, C0 j' V' n8 q' [
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" s& D& U0 C. g+ |% M0 D( wcoWPAtty Recomputed WPA2 Attack* a3 T! R/ O; [% h4 A$ z5 K
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coWPAtty Tables9 O7 M5 [8 u' l6 p w( |: q
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coWPAtty Usage:7 b, W( \( k$ \! _3 T; d" u1 r/ U3 O
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% D% I8 m5 g( P6 W- [( _( acoWPAtty Dictionary Attack:
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; F8 o, q. l2 p7 ~7 cToperform 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.
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" a6 @" ?* ] C' }8 ~6 S* W g! D7 iIn 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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4 o: T* s) n: h( c+ }1 |cowpatty -f dict -r wpapsk-linksys.dump -s linksys
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A- ~6 |6 I2 v* n# J0 o0 {- J4 RAs 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).
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! n2 b1 M- f; P% M& P* J$ r; d6 H" iwpapsk-linksys.dump is the capture containing the four-way handshake
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dict is the password file/ m) d# a. p4 q; h Y+ H. x2 c
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& N/ v$ \% o1 @( V9 t% ulinksys is the network SSID
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Precomputing WPA PMK to crack WPA PSK:
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2 T8 |; I* |; A% v, Wgenpmkis 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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$ n6 h: d4 U8 J, x3 l' P8 gSo to generate some hash files for a network using the SSID cuckoo we use:
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8 x/ b+ a" b4 i1 k' h) j- ]genpmk -f dict -d linksys.hashfile -s linksys ; H4 m* S: O7 v: F( Q
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dict is the password file
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linksys.hashfile is our output file
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linksys is the network ESSID/ c% w( m8 h9 }+ b9 T* n5 n
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. w+ W i9 p! x+ O5 P; Q7 f; w- 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.1 D8 C7 ~2 y+ h5 N* v, v
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5 F' |4 Z4 C" v5 fcowpatty -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- u7 O( H9 R% [* @3 G# \: R! z, H
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$ M4 S6 T: J7 Flinksys.hashfile are our precomputed hashes! {7 Y9 S$ Z% b9 |9 S4 |
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/ A& C/ ?% l& zlinksys is the network ESSID6 W0 Y% B5 x. M+ a/ }
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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:
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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.+ Q! L. u" M/ f) ~8 Y! X+ o
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cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys1 s4 x X- {, \% @& ~) w
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wpa2psk-linksys.dump is the capture containing the four-way handshake; c3 z, q6 O% e2 k0 e
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dict is the password file
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linksys is the network SSID- G' p; Z6 j L! L
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' H: ]5 L/ v- h( F. x5 [coWPAtty Tables: ) ^4 o }: \& d" u& k. q/ m7 Y+ ]$ K
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:- T2 C) p- G9 n) U3 s0 Q8 C: y+ R' i& e
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http://torrents.lostboxen.net/co ... atty-4.0_2006-10-19$ x- v6 z* \, R2 Z) s3 ~+ W$ b+ i1 j7 w
4 x$ }! D' o0 l7 P3 J. ~2 w/ A6 ~- o# }$ 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 H
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( r) |, O. w o' v4 l6 z% R! @; `) {5 [Or you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/8 D7 }6 B% Q$ n/ I8 ?
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