I've heard the term "hydra" thrown around alot in virus discussions. What exactly is a hydra?

H Y D R A

© 2001-2004 by van Hauser / THC
<vh@thc.org> http://www.thc.org


INTRODUCTION
------------
Number one of the biggest security holes are passwords, as every password
security study shows.
This tool is a proof of concept code, to give researchers and security
consultants the possiblity to show how easy it would be to gain unauthorized
access from remote to a system.
THIS TOOL IS FOR LEGAL PURPOSES ONLY!
FOR USING THIS TOOL COMMERCIALLY, SEE THE LICENCE FILE!

There are already several login hacker tools available, however none does
either support more than one protocol to attack or support parallized
connects.
Currently this tool supports:
TELNET, FTP, HTTP, HTTPS, HTTP-PROXY, LDAP, SMB, SMBNT, MS-SQL, MYSQL, REXEC,
SOCKS5, VNC, POP3, IMAP, NNTP, PCNFS, ICQ, SAP/R3, Cisco auth, Cisco enable,
SMTP-AUTH, SSH2, SNMP, CVS, Cisco AAA.
However the module engine for new services is very easy so it won't take a
long time until even more services are supported.
Planned are: SSH v1, Oracle and more.
Your help in writing these modules is highly appreciated!! :-)


HOW TO COMPILE
--------------
Type "./configure" and then "make" and "make install".
If you have CYGWIN, you have to follow the instructions "./configure" prints
after running.
For PalmPilot, run "./configure-palm".
For ARM processor mobiles, run "./configure-arm".


SUPPORTED PLATFORMS
-------------------
All UNIX platforms (linux, *bsd, solaris, etc.)
Mac OS/X
Windows with Cygwin (both ipv4 and ipv6)
Mobile systems with ARM processors and Linux (e.g. Zaurus, iPaq)
PalmOS


HOW TO USE
----------
Type "./configure", followed by "make" to compile hydra and then
"./hydra -h" to see the command line options.
You make also type "make install" to install hydra to /usr/local/bin.
Note that NO login/password file is included. Generate them yourself.
For Linux users, a GTK gui is available, try "./xhydra"


SPECIAL OPTIONS FOR MODULES
---------------------------
Via the third command line parameter (TARGET SERVICE OPTIONAL) or the -m
commandline option, you can pass one option to a module.
Only some modules actually use this, a few require this.
Here is the complete list:

service module optional parameter
============== =================================================
www / http / ssl / https
specifies the page to authentication at (REQUIRED)
Value can be "/secret" or "http://bla.com/foo/bar" or
"https://test.com:8080/members"
http-proxy specifies the page to authentication at (OPTIONAL,
default http://www.suse.com/)
smbnt value [L,LH,D,DH,B,BH] (REQUIRED)
(L) Check local accounts, (D) Domain Accounts, ( Either
(H) interpret passwords as NTLM hashes
ldap specifies the DN (OPTIONAL, you can also specify the DN
as login with -l)
cisco-enable specifies the logon password for the cisco device (REQUIRED)
sapr3 specifies the client id, a number between 0 and 99 (REQUIRED)
telnet specified the string which is displayed after a successful
login (case insensitive), use if the default in the telnet
module produces too many false positives (OPTIONAL)

An example for how to use this with the www module to hand over the web page
to authenticate to:
hydra -l jdoe -P /tmp/passlist www.attack.com http /members/
is the same like:
hydra -m /members/ -l jdoe -P /tmp/passlist www.attack.com http
other example:
hydra -m LH -l administrator -P sam.dump nt.microsoft.com smbnt
still other example:
hydra -l gast -p gast -m 6 -s 3200 sapr3.sap.com sapr3
or
hydra -l bla -p blubb ms.com telnet "welcome hacker"

RESTORING AN ABORTED/CRASHED SESSION
------------------------------------
When hydra is aborted with Control-C, killed or crashs, it leavs a
"hydra.restore" file behind which contains all necessary information to
restore the session. This session file is written every 5 minutes.
NOTE: if you are cracking parallel hosts (-M option), this feature doesnt
work, and is therefore disabled!
NOTE: the hydra.restore file can NOT be copied to a different platform (e.g.
from little indian to big indian, or from solaris to aix)


HOW TO SCAN/CRACK OVER A PROXY
------------------------------
The environment variable HYDRA_PROXY_HTTP defines the web proxy (this works
just for the http/www service!).
The following syntax is valid:
HYDRA_PROXY_HTTP="http://123.45.67.89:8080/"
For all other services, use the HYDRA_PROXY_CONNECT variable to scan/crack
via a web proxy's CONNECT call. It uses the same syntax. eg:
HYDRA_PROXY_CONNECT=proxy.anonymizer.com:8000
If you require authentication for the proxy, use the HYDRA_PROXY_AUTH
environment variable:
HYDRA_PROXY_AUTH="the_login:the_password"


ADDITIONAL HINTS
----------------
* uniq your dictionary files! this can save you a lot of time :-)
cat words.txt | sort | uniq > dictionary.txt
* if you know that the target is using a password policy (allowing users
only to choose password with a minimum length of 6, containing a least one
letter and one number, etc. use the tool pw-inspector which comes along
with the hydra package to reduce the password list:
cat dictionary.txt | pw-inspector -m 6 -c 2 -n > passlist.txt


OPTIONS YOU WILL NEVER SEE IN HYDRA
-----------------------------------
In this section I put feature request which I will never implement within
hydra - and why.
? feeding login/passwords from stdin (e.g. from john)
# This will not be implemented as it would not be possible to use with
a) the restore functionality and multiple targets
workarounds for would be possible however ugly hacks which would
sometimes not work. As this feature will therefore will not fit the other
standard functionality, you will never see it here.


SPEED
-----
through the parallizing feature, this password cracker tool can be very
fast, however it depends on the protocol. The fastest is generally POP3,
then FTP, then Telnet, and the least IMAP.
Experiment with the task option (-t) to speed thinks up! The higher - the
faster ;-) (but too high, and it disables the service)


STATISTICS
----------
Run against a SuSE Linux 7.2 on localhost with a "-C FILE" containing
295 entries (294 tries invalid logins, 1 valid). Every test was run three
times (only for "1 task" just once), and the average noted down.

P A R A L L E L T A S K S
SERVICE 1 4 8 16 32 50 64 100 128
------- --------------------------------------------------------------------
telnet 23:20 5:58 2:58 1:34 1:05 0:33 0:45* 0:25* 0:55*
ftp 45:54 11:51 5:54 3:06 1:25 0:58 0:46 0:29 0:32
pop3 92:10 27:16 13:56 6:42 2:55 1:57 1:24 1:14 0:50
imap 31:05 7:41 3:51 1:58 1:01 0:39 0:32 0:25 0:21

(*)
Note: telnet timings can be VERY different for 64 to 128 tasks! e.g. with
128 tasks, running four times resulted in timings between 28 and 97 seconds!
The reason for this is unknown...

guesses per task (rounded up):
295 74 38 19 10 6 5 3 3

guesses possible per connect (depends on the server software and config):
telnet 4
ftp 6
pop3 1
imap 3


BUGS & FEATURES
---------------
Email me if you find bugs or if you have written a new module.
vh@thc.org

Type Bits/KeyID Date User ID
pub 2048/CDD6A571 1998/04/27 van Hauser / THC <vh@reptile.rug.ac.be>

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Its on many live cd's but also available for windoze. I am not into VIRRI things so it could be something else. Hydra is an opensource project.

great !!!


Edited by mod Packet: please include more meat in posts, this is basically a Thx post so warning added.

That isnt what I was talking about. I heard that there is a type of VIRUS called a hydra. Just how there is a type of virus called a worm.

http://ve.nod32.ch/worms/hydra.php
http://vil.nai.com/vil/content/v_99108.htm
http://www.f-secure.com/v-descs/hydra.shtml


The worm is old now, but I remember this being one of the better worms?


Could've done some trouble searching..

Can you people read? I said a type of virus not a virus. Seriously, sentences and words.

for a start, you can be at least polite since you are the one asking for info.

erm i notice shell has the BOLD LARGE RED words sometimes on many threads
but anyway
hydra is usually the tool not the worm
cause the worm is too old and exposed...no use anymore
hurts little

I heard that there is a type of virus not a virus called a hydra. Please read this word for word.

Types of virii: virus, worm, trojan
Names of virii: W32/CodeGreen, W32/Simple.D

I want to know if there is A TYPE OF VIRUS NOT THE NAME OF A VIRUS called a hydra.

no.

Then what is this?

http://www.hackquest.de/modules.php?op=mod...Z&ksubcat=SRC#4

http://www.google.com/search?q=cache:wrCEg...+computer&hl=en

Keep searching till ya see the Hydra highlights. That maybe one meaning your talking about

-----------------------------------------------------

Or you maybe you should've asked a greek ?

In Greek mythology, the hydra was a nine-headed serpent that when one of its heads was cut off, two new heads would grow in its place.

Which is probably how the hydra ftp works. Does everything it can to survive any user/automated attacks....

only in the movie Swordfish

back to the real world; theres no such thing


and no Angela Bennett isn't a real person either

Is it in swordfish? Havent seen that movie yet... How is it? I heard that there is a scene where a guy breaks RSA?

the movie aint too bad a bit unrealistic though, but wich Action movie aint?