![]() ![]() Type medusa in the terminal to see the options: ~# medusa Probes sent: 17 | timed-out: 0 | prematurely-closed: 0 Ncrack done: 1 service scanned in 15.00 seconds. Using the -v flag gives us a little more information as well: ~# ncrack -U usernames.txt -P passwords.txt 10.10.0.50:21 -vĭiscovered credentials on 'ftp' 'password'ĭiscovered credentials on 'ftp' 's3cr3t'ĭiscovered credentials on 'ftp' 'Password1' We can also specify the port number explicitly, which is useful if a service is running on a non-default port. We can see it discovered credentials for user and ftp the multiple hits are because anonymous logins are allowed for that user, making any password a valid password. Ncrack done: 1 service scanned in 15.01 seconds. Then, specify the service (FTP) followed by the IP address of our target: ~# ncrack -U usernames.txt -P passwords.txt ĭiscovered credentials for ftp on 10.10.0.50 21/tcp: We can use the -U flag to set the file containing usernames, and the -P flag to set the file containing passwords. SEE THE MAN PAGE () FOR MORE OPTIONS AND EXAMPLESĪs you can see, there are a lot of options here, but for now, we'll stick to the basics. SSH, RDP, FTP, Telnet, HTTP(S), Wordpress, POP3(S), IMAP, CVS, SMB, VNC, SIP, Redis, PostgreSQL, MQTT, MySQL, MSSQL, MongoDB, Cassandra, WinRM, OWA, DICOM proxy : Make connections via socks4, 4a, http. datadir : Specify custom Ncrack data file location sL or -list: only list hosts and services f: quit cracking service after one found credential save : Save restoration file with specific filename resume : Continue previously saved session append-output: Append to rather than clobber specified output files log-errors: Log errors/warnings to the normal-format output file ![]() nsock-trace : Set nsock trace level (Valid range: 0 - 10) d: Set or increase debugging level (Up to 10 is meaningful) v: Increase verbosity level (use twice or more for greater effect) oA : Output in the two major formats at once oN/-oX : Output scan in normal and XML format, respectively, to the given filename. pairwise: Choose usernames and passwords in pairs. passwords-first: Iterate password list for each username. stealthy-linear: try credentials using only one connection against each specified host connection-limit : threshold for total concurrent connections T: Set timing template (higher is faster) To (time-out): maximum cracking for service, regardless of success so far 30m).Ĭl (min connection limit): minimum number of concurrent parallel connectionsĬL (max connection limit): maximum number of concurrent parallel connectionsĪt (authentication tries): authentication attempts per connectionĬd (connection delay): delay between each connection initiationĬr (connection retries): caps number of service connection attempts (milliseconds), 'm' (minutes), or 'h' (hours) to the value (e.g. Options which take are in seconds, unless you append 'ms' Path : used in modules like HTTP ('=' needs escaping if used)ĭb : used in modules like MongoDB to specify the databaseĭomain : used in modules like WinRM to specify the domain g : options will be applied to every service globally m :: options will be applied to all services of this type p : services will be applied to all non-standard notation hosts Service arguments can be specified to be host-specific, type of service-specific Using -p which will be applied to all hosts in non-standard notation. iN : Input from Nmap's -oN Normal output formatĬan pass target specific services in ://target (standard) notation or iX : Input from Nmap's -oX XML output format Simply type ncrack in the terminal to display the usage information and available options: ~# ncrack The first tool we'll look at today is Ncrack. Using your favorite text editor, create a file, and add a few common usernames: rootĪnd do the same thing for the passwords: password ![]() In a real engagement, we'd want to use files with much larger data sets, but for demonstration purposes, we'll keep these short to speed up the whole process. Next, let's create two text files, one for usernames and one for passwords. Nmap done: 1 IP address (1 host up) scanned in 0.82 seconds We will be using Metasploitable 2 as the target and Kali Linux as the attacking machine. Before we begin, let's run a simple Nmap scan on our target to make sure the FTP service is present. ![]()
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