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[LV.20]漫游旅程
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coWPAtty for Windows MAIN:9 ^, `/ T9 n8 K# g
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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. . u: `( V1 p5 P
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Project Homepage: http://www.willhackforsushi.com/Cowpatty.html
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Local Mirror: Cowpatty-4.0-win32.zip MD5: aa9ead2aacfcc493da3684351425d4c6; o) Q! S% a7 ]
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coWPAtty Dictionary Attack
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Precomputing WPA PMK to crack WPA PSK
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coWPAtty Precomputed WPA Attack8 z; r0 J5 m: `% C8 [
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6 u; l7 \4 T) ^* _coWPAtty Recomputed WPA2 Attack1 {, F$ r# j3 C3 q9 G9 d Z
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, \3 D# y5 Y/ i" M4 r5 B0 L/ KcoWPAtty Tables9 r) U2 P9 z3 C( y% S l
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* t% r# @/ q7 v' q! P; |" ^coWPAtty Usage:
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coWPAtty Dictionary Attack:: u, g: R' Q( j- T5 Y i1 O1 g2 T3 b* z& T$ |4 R o- L. F+ j6 R4 E
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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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T& n" O' w: @' MIn 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.3 m8 I+ Y* g8 N8 o
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7 g" M% K# L! j: x6 vcowpatty -f dict -r wpapsk-linksys.dump -s linksys7 J. O+ ~/ m0 B0 h
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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).# x7 n# }2 N% o4 k4 L) Q
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: |: s/ Z# V' y3 E7 F7 }- Mwpapsk-linksys.dump is the capture containing the four-way handshake
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dict is the password file
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linksys is the network SSID3 f& ^- L) N- j c
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Precomputing WPA PMK to crack WPA PSK:: m% P7 e& G5 F g& I! C
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- t0 [) O; _/ \0 l% {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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2 ?- T" _2 f: p* I: qSo 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 / g8 }: d) b; o
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9 s& R5 L+ e, r; hdict is the password file
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d( G' Z; w$ vlinksys.hashfile is our output file+ `* ~' v/ x4 S* i+ V) c
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" ]6 R) ~8 v/ B9 M( P8 a% S% `0 r5 r( XcoWPAtty Precomputed WPA Attack:# ?/ x) d2 _& C+ W/ i. f# {6 l/ w4 w$ J b
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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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& v2 I3 a# Q# B6 ?" |cowpatty -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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linksys.hashfile are our precomputed hashes
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+ Q/ V) T) j+ f8 Z: xlinksys is the network ESSID
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- y5 Z* W/ F' x! F; ]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.5 D% ]3 l7 A3 E
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: M2 a, S) v# e; V0 T3 b% WcoWPAtty Precomputed WPA2 Attack:% Y9 v4 y3 D7 H) H d$ |' D
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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.
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cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys, Q6 v1 v1 l: {# d+ K, ^, B3 H
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$ [3 r& R2 l9 n( Wwpa2psk-linksys.dump is the capture containing the four-way handshake6 T" k% c# }4 y4 R* w& S
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dict is the password file
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, s' p4 L( o/ k) d9 J+ blinksys is the network SSID
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coWPAtty Tables: ! F& t& i* e2 c
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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http://torrents.lostboxen.net/co ... atty-4.0_2006-10-19
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4 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 W8 L$ J5 T, D/ K8 t* T) I
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Or 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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