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coWPAtty for Windows MAIN:4 _ G% L, J7 y* [* }& D
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. n6 L1 D+ e" u"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol." –1 ]! K# b! j, {+ s, c' q! ]
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Joshua Wright., f, @6 R0 V- w/ t* z
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Project Homepage: http://www.willhackforsushi.com/Cowpatty.html7 C0 s% J- s; g; ]9 |/ s
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8 V6 o2 B$ n" N+ B7 G) OLocal Mirror: Cowpatty-4.0-win32.zip; B1 t9 C4 Z; ?
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coWPAtty Dictionary Attack: s& F' q9 {$ {- U* @4 r. O
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Precomputing WPA PMK to crack WPA PSK
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coWPAtty Precomputed WPA Attack6 |- {* @% J% A* F) \% L
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coWPAtty Recomputed WPA2 Attack5 t- U8 ~; }1 M6 K( B$ g% j- D/ k6 z
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# _9 r9 s3 Y+ o! C2 B& G2 e5 r) lcoWPAtty& f6 }; K! B- c) @
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) X8 c/ T% L0 h" q5 WcoWPAtty Dictionary Attack:
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, Y, r) z" b0 v2 p S8 l- ~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.5 u: Q2 K. |6 S; J; t
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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.
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cowpatty -f dict -r wpapsk-linksys.dump. Z4 w; l6 K& b |7 i+ }; f- Y' S
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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 handshake
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dict is the password file 8 n$ X/ D. A) o/ }; y" U: V( r
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& S& d0 t0 `1 s H# |linksys is the network SSID
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# `: C- n5 ]) B/ ~: c3 }/ u6 E' d1 ^Precomputing WPA PMK to crack WPA PSK:
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: }! ]1 d- S" H9 a6 B: Ggenpmkis used to precompute the hash files in a similar way to Rainbow tablesis used to pre-hash passwords in Windows LANMan attacks.
, b+ S; v7 q5 K/ ?8 UThere is aslight difference however in WPA in that the SSID of the network isused as well as the WPA-PSK to "salt" the hash.; U7 D4 ] h8 O+ O9 Q8 [ B/ K1 ~
* z' ~/ B+ w" _1 `% O# c7 j$ h3 ZThis 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:& \ }! G/ R, Z+ a6 v3 F
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dict
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8 j. `) \. k# a3 wdict is the password file
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linksys.hashfile is our output file
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5 C( Z3 m0 P, b6 alinksys is the network ESSID3 i" M# K; O: w" e
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5 B' i9 p% p; V# TcoWPAtty Precomputed WPA Attack:: l2 V6 w, Z2 {) \# k1 v! w
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# L/ n# j3 l/ G' x LNow wehave created our hash file we can use it against any WPA-PSK networkthat is utilising a network SSID of cuckoo.
2 e7 i& o& X8 B- N4 v. XRemember the capture(wpa-test-01.cap) must contain the four-way handshake to be successful.( h* C ^4 Q" L# `4 j
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-d linksys.hashfile -r wpapsk-linksys.dump
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wpa-test-01.cap is the capture containing the four-way handshake/ j* |. ?4 G$ E' u
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/ G+ C" h B% \3 Hlinksys.hashfile are our precomputed hashes7 F7 m$ ~/ X5 C1 V5 c
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linksys is the network ESSID
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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.( ^7 f/ I# ? k6 ^/ K. k$ d
; N% k" R: S8 zHowever, precomputing large hashfiles for common SSIDS (e.g. linksys, tsunami) would be a sensible movefor most penetration testers.2 ?4 [9 |- ~7 c3 q% n) {
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coWPAtty Precomputed WPA2 Attack:
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% O# u5 J/ _9 Y% ^coWPAtty4.0 is also capable of attacking WPA2 captures.- m; `$ v( Q8 s' m: p
6 T- l; e0 m0 z: zNote: The same hashfile as was used with the WPA capture was also used with the WPA2capture.
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cowpatty/ L; y3 e6 `( t5 [4 m; k S3 h5 v2 p$ N9 t( Q( {, g
-d linksys.hashfile -r wpa2psk-linksys.dump& w3 j2 E0 s/ r' f. ~+ g
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9 e. y8 E3 E2 w. j- Wwpa2psk-linksys.dump is the capture containing the four-way handshake
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: c/ R) L' v) Q( r* j' vdict is the password file
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linksys is the network SSID# R- R4 P( C/ I' D" J b
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+ N- s" M7 M% j3 H8 r9 w' {! c4 ?0 ]coWPAtty Tables: , n# M7 q1 k9 t- l( J0 w4 N; m
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The Church of Wifi have produced some lookup tables for 1000 SSID's computed against a 170,000 word password file.) N i1 ?" r# e& l: m9 }. W) B
The resultant table are approximately 7 Gigabytes in size and can be downloaded via Torrent:
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http://torrents.lostboxen.net/co ... atty-4.0_2006-10-19* p" [- X/ [- y" }/ d7 r
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, Q& K3 ?7 _& @, p. ^9 D1 jA 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/
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Or you can buy them via DVD, direct from Renderman (initiator of the project):9 ^ ~. ^" g" p4 H# N: N
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http://www.renderlab.net/projects/WPA-tables/ |
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