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coWPAtty for Windows MAIN:; S; m, t( [/ `. e, Z# r! I3 T) S/ e7 x0 B& q& H( |/ V& z2 M
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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. 9 H! o* C* O' e5 \5 V4 u' Y
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$ a( W8 Q+ ]* S& Y, VProject Homepage: http://www.willhackforsushi.com/Cowpatty.html
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5 U7 {5 t8 z9 V. C8 JLocal Mirror: Cowpatty-4.0-win32.zip MD5: aa9ead2aacfcc493da3684351425d4c6
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coWPAtty Dictionary Attack1 G3 |+ I: s! l5 s- v
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Precomputing WPA PMK to crack WPA PSK
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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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4 B, t$ u$ t" i% D% I8 m5 g( P6 W- [( _( acoWPAtty Dictionary Attack:# [* L( ]4 s3 Q) k
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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. E6 E6 q2 r( M
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9 }' |2 c" H9 E; i+ [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.) |: {+ p/ U! }
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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).
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wpapsk-linksys.dump is the capture containing the four-way handshake2 h; f8 [# ]* [% W! P; ~
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, V: m6 W; D7 f. T" Z% x- [dict is the password file) w$ D& n0 u7 Z
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linksys is the network SSID
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Precomputing WPA PMK to crack WPA PSK:6 W3 s. w/ V3 z
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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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So to generate some hash files for a network using the SSID cuckoo we use:
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8 y1 b8 }: v7 Dgenpmk -f dict -d linksys.hashfile -s linksys ! V0 p- j1 D3 u3 V* k; b% a6 C/ A1 ^
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( ~; W% x% c; ldict is the password file) h6 z; i ^ ~- D2 _$ L' [/ p
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linksys.hashfile is our output file
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% q) Q, j2 D+ w5 U/ Mlinksys is the network ESSID B9 ^ s4 Y0 Y8 B( V
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8 o7 s4 s! Y( t& _7 _8 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.
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cowpatty -d linksys.hashfile -r wpapsk-linksys.dump -s linksys 2 y8 D' Z9 C4 u
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wpa-test-01.cap is the capture containing the four-way handshake" a1 E! v! k6 p( t& K) ]- L w, p/ z7 V
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linksys.hashfile are our precomputed hashes
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linksys is the network ESSID
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% w9 i2 Q& p M5 jNotice 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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/ ?7 R( i1 D2 J$ i9 P9 gcoWPAtty4.0 is also capable of attacking WPA2 captures. Note: The same hashfile as was used with the WPA capture was also used with the WPA2capture.$ p5 H0 t) d) F4 j/ H
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cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys* q* s3 |6 J! F3 b6 h& n
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wpa2psk-linksys.dump is the capture containing the four-way handshake; X+ x/ A6 B7 V6 z) H
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8 }6 n/ B& j/ x* u5 Mdict is the password file
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! M/ U% T D2 E$ ~' A: ?! ilinksys is the network SSID
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: M( v! d) W+ o' H: ]5 L/ v- h( F. x5 [coWPAtty Tables: ) ^4 o }: \& d" u& k
$ Z* I$ |. g; l0 |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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9 p7 P. v0 Q* {. Uhttp://torrents.lostboxen.net/co ... atty-4.0_2006-10-19$ x- v6 z* \, R2 Z
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( ^, M: N. R# R0 {# }$ 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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. m, J" m, Q1 A1 a) W) R/ a/ @6 z% R! @; `) {5 [Or you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/ |( F% e$ B+ U
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