Ncrack Package Description
Ncrack is a high-speed network authentication cracking tool. It was built to help companies secure their networks by proactively testing all their hosts and networking devices for poor passwords. Security professionals also rely on Ncrack when auditing their clients. Ncrack was designed using a modular approach, a command-line syntax similar to Nmap and a dynamic engine that can adapt its behaviour based on network feedback. It allows for rapid, yet reliable large-scale auditing of multiple hosts.
Ncrack’s features include a very flexible interface granting the user full control of network operations, allowing for very sophisticated bruteforcing attacks, timing templates for ease of use, runtime interaction similar to Nmap’s and many more. Protocols supported include RDP, SSH, http(s), SMB, pop3(s), VNC, FTP, and telnet.
Source: http://nmap.org/ncrack/
Ncrack Homepage | Kali Ncrack Repo
- Author: Insecure.Com LLC
- License: GPLv2
Tools included in the ncrack package
ncrack – High-speed network authentication cracking tool
[email protected]:~# ncrack -h
Ncrack 0.4ALPHA ( http://ncrack.org )
Usage: ncrack [Options] {target and service specification}
TARGET SPECIFICATION:
Can pass hostnames, IP addresses, networks, etc.
Ex: scanme.nmap.org, microsoft.com/24, 192.168.0.1; 10.0.0-255.1-254
-iX <inputfilename>: Input from Nmap's -oX XML output format
-iN <inputfilename>: Input from Nmap's -oN Normal output format
-iL <inputfilename>: Input from list of hosts/networks
--exclude <host1[,host2][,host3],...>: Exclude hosts/networks
--excludefile <exclude_file>: Exclude list from file
SERVICE SPECIFICATION:
Can pass target specific services in <service>://target (standard) notation or
using -p which will be applied to all hosts in non-standard notation.
Service arguments can be specified to be host-specific, type of service-specific
(-m) or global (-g). Ex: ssh://10.0.0.10,at=10,cl=30 -m ssh:at=50 -g cd=3000
Ex2: ncrack -p ssh,ftp:3500,25 10.0.0.10 scanme.nmap.org google.com:80,ssl
-p <service-list>: services will be applied to all non-standard notation hosts
-m <service>:<options>: options will be applied to all services of this type
-g <options>: options will be applied to every service globally
Misc options:
ssl: enable SSL over this service
path <name>: used in modules like HTTP ('=' needs escaping if used)
TIMING AND PERFORMANCE:
Options which take <time> are in seconds, unless you append 'ms'
(miliseconds), 'm' (minutes), or 'h' (hours) to the value (e.g. 30m).
Service-specific options:
cl (min connection limit): minimum number of concurrent parallel connections
CL (max connection limit): maximum number of concurrent parallel connections
at (authentication tries): authentication attempts per connection
cd (connection delay): delay <time> between each connection initiation
cr (connection retries): caps number of service connection attempts
to (time-out): maximum cracking <time> for service, regardless of success so far
-T<0-5>: Set timing template (higher is faster)
--connection-limit <number>: threshold for total concurrent connections
AUTHENTICATION:
-U <filename>: username file
-P <filename>: password file
--user <username_list>: comma-separated username list
--pass <password_list>: comma-separated password list
--passwords-first: Iterate password list for each username. Default is opposite.
OUTPUT:
-oN/-oX <file>: Output scan in normal and XML format, respectively, to the given filename.
-oA <basename>: Output in the two major formats at once
-v: Increase verbosity level (use twice or more for greater effect)
-d[level]: Set or increase debugging level (Up to 10 is meaningful)
--nsock-trace <level>: Set nsock trace level (Valid range: 0 - 10)
--log-errors: Log errors/warnings to the normal-format output file
--append-output: Append to rather than clobber specified output files
MISC:
--resume <file>: Continue previously saved session
-f: quit cracking service after one found credential
-6: Enable IPv6 cracking
-sL or --list: only list hosts and services
--datadir <dirname>: Specify custom Ncrack data file location
-V: Print version number
-h: Print this help summary page.
MODULES:
FTP, SSH, TELNET, HTTP(S), POP3(S), SMB, RDP, VNC
EXAMPLES:
ncrack -v --user root localhost:22
ncrack -v -T5 https://192.168.0.1
ncrack -v -iX ~/nmap.xml -g CL=5,to=1h
SEE THE MAN PAGE (http://nmap.org/ncrack/man.html) FOR MORE OPTIONS AND EXAMPLES
ncrack Usage Example
Use verbose mode (-v), read a list of IP addresses (-iL win.txt), and attempt to login with the username victim (–user victim) along with the passwords in a dictionary (-P passes.txt) using the RDP protocol (-p rdp) with a one connection at a time (CL=1):
[email protected]:~# ncrack -v -iL win.txt --user victim -P passes.txt -p rdp CL=1
Starting Ncrack 0.4ALPHA ( http://ncrack.org ) at 2014-05-19 09:54 EDT
rdp://192.168.1.220:3389 finished.
Discovered credentials on rdp://192.168.1.200:3389 'victim' 's3cr3t'