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coWPAtty for Windows MAIN:
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" @& q6 D0 c% m"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol." - Joshua Wright. & \4 h; g. W% d3 v6 M
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7 G( w/ M' q+ z$ Z" B, q( b& FProject Homepage: http://www.willhackforsushi.com/Cowpatty.html ) \! q1 W; l+ V$ m2 w! D4 t
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Local Mirror: Cowpatty-4.0-win32.zip MD5: aa9ead2aacfcc493da3684351425d4c68 T2 d. f3 J- X* J# n- Q7 z) T
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coWPAtty Dictionary Attack) y7 Q. m2 j1 \; S7 m2 c4 [$ W; ?
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Precomputing WPA PMK to crack WPA PSK: P3 V. ~3 s& @4 z( K# M* v
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coWPAtty Precomputed WPA Attack3 ? u# z# N- W7 G7 N
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1 ?7 l- Z- S g0 Q1 V9 q# WcoWPAtty Recomputed WPA2 Attack
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coWPAtty Tables( o9 E; Y! r) j. q; C
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N& l! e0 W, D0 z+ Q7 KcoWPAtty Usage:5 }8 W, j! Z6 l
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coWPAtty Dictionary Attack:
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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.
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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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9 E J5 ?% y. kcowpatty -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).$ P1 E4 S: f1 H# t Y. ~
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wpapsk-linksys.dump is the capture containing the four-way handshake3 n! i; V8 M3 C; y
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dict is the password file
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linksys is the network SSID
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, B. l8 Z: D( uPrecomputing WPA PMK to crack WPA PSK:, {# Z6 Q T, s( e) w" c- s" E8 u
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: Y `" O6 B- Egenpmkis 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.. h H4 x7 R& v1 F- W0 F5 o$ O
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So to generate some hash files for a network using the SSID cuckoo we use:
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+ K3 `% `- X: J, Z: `genpmk -f dict -d linksys.hashfile -s linksys . r, @! P7 `$ j$ l
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4 w) l# k- U6 Jdict is the password file' x: [. _8 N! x' U/ W
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linksys.hashfile is our output file
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4 e0 z U9 M0 R; M* ^! ^linksys is the network ESSID
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coWPAtty Precomputed WPA Attack r4 n4 v$ |) [- ]* }/ }3 D
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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
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3 p% `2 ]9 G; j2 b# p6 D1 jwpa-test-01.cap is the capture containing the four-way handshake0 v: [' Z& T( G4 q; j
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linksys.hashfile are our precomputed hashes, r% m2 o3 w8 h# ]& C Q& s
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linksys is the network ESSID
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$ T' c3 V% c. ~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.( b, J/ K+ b! ?7 P% `
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( Z6 p. X: S& p6 m" ?1 I8 M- kcoWPAtty Precomputed WPA2 Attack:
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* a- P8 n0 ~! f! o2 N: Q3 g2 x' AcoWPAtty4.0 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) s; w* O# r
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cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys
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wpa2psk-linksys.dump is the capture containing the four-way handshake. C) K+ A# u# t9 ^
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: ~ R5 Z; y$ b, P7 s! gdict is the password file
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linksys is the network SSID; p% [5 V& X8 J' X1 E" z' j" H" q
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coWPAtty Tables:
2 D4 P/ ]: B- w/ _ p$ E- E# r' A7 D7 r/ g2 X% z' s$ O5 _. PThe 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:& @) N; `' R2 Y- a3 j# F$ w. S3 Z* n
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4 {; `8 {# I# n$ lhttp://torrents.lostboxen.net/co ... atty-4.0_2006-10-197 e0 b3 o8 O4 D) j2 ^5 C2 s! Y) i7 v2 ]; q! I+ X2 W2 b; B2 X
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- l6 K. ^0 z6 e: m# q2 ~A 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/7 ^, e/ H) c1 v7 w: \9 I6 x! q/ F: ?
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; ~2 t7 j( a& L \Or you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/
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