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coWPAtty for Windows MAIN:
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# N, t @8 f' t/ R) @6 P"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 M9 O: \$ p1 o1 [ x' s- r4 s: ?
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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) h J! J/ k1 Q3 R8 E' S
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6 s/ ]- q( U( B* s7 [coWPAtty Dictionary Attack. p: p+ S- v+ _7 [! D) N
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Precomputing WPA PMK to crack WPA PSK
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coWPAtty Precomputed WPA Attack0 I( H9 L% a+ e
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coWPAtty Recomputed WPA2 Attack
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coWPAtty Tables
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N& l! e0 W, D0 z+ Q7 KcoWPAtty Usage:, Z! l# J1 y G+ X) E3 p
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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., N$ M& `) ?1 |' w& w6 h
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cowpatty -f dict -r wpapsk-linksys.dump -s linksys
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* [' @+ v/ C( r$ J/ `* wAs 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).' q* r" r5 t# V
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wpapsk-linksys.dump is the capture containing the four-way handshake
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N0 Y( j0 ]- g8 Z1 K3 _dict is the password file+ V. W( S8 R& D, _
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linksys is the network SSID
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1 c1 }/ C5 K+ {& L, B. l8 Z: D( uPrecomputing WPA PMK to crack WPA PSK:, {# Z6 Q T, s( e) w" c- s" E8 u+ _0 ^* v5 z- M( _
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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:# C0 L& ?& N8 o1 O! I. o
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3 Y4 `$ @7 Y* [# Dgenpmk -f dict -d linksys.hashfile -s linksys
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linksys.hashfile is our output file
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linksys is the network ESSID- K/ L7 h" M) d e
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5 W: T' N, x, |9 [9 Y2 @coWPAtty Precomputed WPA Attack r4 n4 v$ |) [- ]* }/ }3 D# C5 b. `8 B4 o8 ]# M0 ^& B
- d! H. f. @9 e% B5 SNow 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 * x) d ]3 {& U
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wpa-test-01.cap is the capture containing the four-way handshake
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( K. E1 `& V" t* i, `# Mlinksys.hashfile are our precomputed hashes4 T$ I3 q/ \# S3 _' k7 [
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linksys is the network ESSID% Z. V5 u+ n! I& ]
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8 W/ u; v* [, X* TNotice 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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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.1 K" P/ n' P7 K. W6 ~# q
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cowpatty -d linksys.hashfile -r wpa2psk-linksys.dump -s linksys+ F' f V0 u9 ^* Z: h0 M1 L1 {
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% s- z+ Y6 d9 l* g5 c$ wwpa2psk-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 SSID9 p2 }" L0 Z% j1 U. U/ J
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coWPAtty Tables:
9 n+ }8 { { V- 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- a
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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: ?- b$ s7 R" U6 r1 M
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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/
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