Rapid7 Vulnerability & Exploit Database

Password Cracker: Linux

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Password Cracker: Linux



This module uses John the Ripper or Hashcat to identify weak passwords that have been acquired from unshadowed passwd files from Unix/Linux systems. The module will only crack MD5, BSDi and DES implementations by default. However, it can also crack Blowfish and SHA(256/512), but it is much slower. MD5 is format 500 in hashcat. DES is format 1500 in hashcat. BSDI is format 12400 in hashcat. BLOWFISH is format 3200 in hashcat. SHA256 is format 7400 in hashcat. SHA512 is format 1800 in hashcat.


  • theLightCosine <theLightCosine@metasploit.com>
  • hdm <x@hdm.io>
  • h00die


Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/analyze/crack_linux
msf auxiliary(crack_linux) > show actions
msf auxiliary(crack_linux) > set ACTION < action-name >
msf auxiliary(crack_linux) > show options
    ...show and set options...
msf auxiliary(crack_linux) > run 

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security