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coWPAtty for Windows MAIN:
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0 {( C: G+ s6 D"coWPAtty is designed to audit the pre-shared key (PSK) selection for WPA networks based on the TKIP protocol." - Joshua Wright. 0 Z7 B+ U- Z8 h$ o; r" a' I
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5 d. m, B# d, j: U6 C0 {Project Homepage: http://www.willhackforsushi.com/Cowpatty.html " H4 R) d: Z% e1 r, ?
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Local Mirror: Cowpatty-4.0-win32.zip MD5: aa9ead2aacfcc493da3684351425d4c6$ H7 C0 \& d. Y2 j/ U6 f
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coWPAtty Dictionary Attack
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Precomputing WPA PMK to crack WPA PSK5 t3 k9 ?- y3 v. P. w2 V$ t4 \
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; ?9 i8 h# A" R$ j: g2 TcoWPAtty Precomputed WPA Attack
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( z; \. S$ d9 [0 TcoWPAtty Recomputed WPA2 Attack! v- T# a) Q* ^+ ]. ^3 A2 T4 E
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coWPAtty Tables% j* ?; {& n5 K* a
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coWPAtty Usage:
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& s# i8 c7 j; J2 b/ h1 U& i/ p6 F ncoWPAtty Dictionary Attack:: u, g: R' Q( j- T5 Y i1 O1 g2 T) k1 _5 v. b( b R
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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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cowpatty -f dict -r wpapsk-linksys.dump -s linksys6 q* z" P2 _0 i& S5 V* l, I
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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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0 H4 }2 C$ F: |% ^wpapsk-linksys.dump is the capture containing the four-way handshake6 E( q. _" S( D' R
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/ j b; {& o udict is the password file
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_5 S3 q. r* i2 H% w+ }linksys is the network SSID
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& c$ o- f7 U6 t2 R. B uPrecomputing WPA PMK to crack WPA PSK:
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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.& D$ q _; I2 U, Z4 y) {
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% A& q/ k6 _5 t2 _& Y' MSo to generate some hash files for a network using the SSID cuckoo we use:
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genpmk -f dict -d linksys.hashfile -s linksys . W5 q* ~( ~7 l* e, T
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dict is the password file6 i' w$ d& q4 R) ` ^5 w a! g
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linksys.hashfile is our output file: ]' [' b6 B0 v
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% k t+ v( y; E2 Z3 Plinksys is the network ESSID# ~9 D, a' q { p/ B( X
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1 W, s. N b3 N" W6 B" v3 z/ `& N( P8 a% S% `0 r5 r( XcoWPAtty Precomputed WPA Attack:# ?/ x) d2 _& C+ W/ i
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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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* Q9 D. o' ?! a2 Q3 `, b* Ycowpatty -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
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' j' I0 i+ s0 l) o5 K. u% j e2 @linksys.hashfile are our precomputed hashes7 Y; C9 }5 Q0 X p) V! o
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/ K2 e3 d+ `* o+ `% r; vNotice 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., n k2 P; R# U- r
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6 Y7 G* h, q% U* Z! b, p- e1 HcoWPAtty Precomputed WPA2 Attack:% n& R# v- I2 J# O
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" k* A; h+ g" G0 D! `( Z; l" TcoWPAtty4.0 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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" S2 G. I A# H: K, d w- scowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys
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8 V0 e- a3 [. j/ }wpa2psk-linksys.dump is the capture containing the four-way handshake
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5 d# c+ z/ b0 vdict is the password file
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2 ^6 r- R q, E( t \( g+ @. scoWPAtty Tables: 4 p8 m( y; K& |) t8 }2 O
2 I; ], f: ~. u& `4 t, P8 gThe 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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8 e9 {' ]' z% }& ?* O. K' X% vhttp://torrents.lostboxen.net/co ... atty-4.0_2006-10-19
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6 I$ l) ~& b0 a, a" U: s4 l% Y- E. {3 Z5 w9 B$ PA 33 Gigabyte set of tables are also available: http://umbra.shmoo.com:6969/1 P" V6 G( J9 W. w3 [. s- i2 F: d+ _' E
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- s+ H7 s- a( P" z3 gOr you can buy them via DVD, direct from Renderman (initiator of the project): http://www.renderlab.net/projects/WPA-tables/. J% }2 r' B; I6 C+ ~; ` |
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