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82 lines
4 KiB
ReStructuredText
82 lines
4 KiB
ReStructuredText
:tocdepth: 3
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policy/protocols/ssh/detect-bruteforcing.zeek
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=============================================
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.. zeek:namespace:: SSH
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Detect hosts which are doing password guessing attacks and/or password
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bruteforcing over SSH.
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:Namespace: SSH
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:Imports: :doc:`base/frameworks/intel </scripts/base/frameworks/intel/index>`, :doc:`base/frameworks/notice </scripts/base/frameworks/notice/index>`, :doc:`base/frameworks/sumstats </scripts/base/frameworks/sumstats/index>`, :doc:`base/protocols/ssh </scripts/base/protocols/ssh/index>`
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Summary
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~~~~~~~
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Redefinable Options
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###################
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=============================================================================== =====================================================================
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:zeek:id:`SSH::guessing_timeout`: :zeek:type:`interval` :zeek:attr:`&redef` The amount of time to remember presumed non-successful logins to
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build a model of a password guesser.
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:zeek:id:`SSH::ignore_guessers`: :zeek:type:`table` :zeek:attr:`&redef` This value can be used to exclude hosts or entire networks from being
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tracked as potential "guessers".
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:zeek:id:`SSH::password_guesses_limit`: :zeek:type:`double` :zeek:attr:`&redef` The number of failed SSH connections before a host is designated as
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guessing passwords.
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=============================================================================== =====================================================================
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Redefinitions
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#############
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============================================ ============================================================
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:zeek:type:`Intel::Where`: :zeek:type:`enum`
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* :zeek:enum:`SSH::SUCCESSFUL_LOGIN`:
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An indicator of the login for the intel framework.
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:zeek:type:`Notice::Type`: :zeek:type:`enum`
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* :zeek:enum:`SSH::Login_By_Password_Guesser`:
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Indicates that a host previously identified as a "password
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guesser" has now had a successful login
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attempt.
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* :zeek:enum:`SSH::Password_Guessing`:
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Indicates that a host has been identified as crossing the
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:zeek:id:`SSH::password_guesses_limit` threshold with
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failed logins.
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============================================ ============================================================
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Detailed Interface
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~~~~~~~~~~~~~~~~~~
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Redefinable Options
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###################
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.. zeek:id:: SSH::guessing_timeout
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:source-code: policy/protocols/ssh/detect-bruteforcing.zeek 34 34
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:Type: :zeek:type:`interval`
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:Attributes: :zeek:attr:`&redef`
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:Default: ``30.0 mins``
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The amount of time to remember presumed non-successful logins to
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build a model of a password guesser.
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.. zeek:id:: SSH::ignore_guessers
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:source-code: policy/protocols/ssh/detect-bruteforcing.zeek 39 39
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:Type: :zeek:type:`table` [:zeek:type:`subnet`] of :zeek:type:`subnet`
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:Attributes: :zeek:attr:`&redef`
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:Default: ``{}``
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This value can be used to exclude hosts or entire networks from being
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tracked as potential "guessers". The index represents
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client subnets and the yield value represents server subnets.
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.. zeek:id:: SSH::password_guesses_limit
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:source-code: policy/protocols/ssh/detect-bruteforcing.zeek 30 30
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:Type: :zeek:type:`double`
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:Attributes: :zeek:attr:`&redef`
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:Default: ``30.0``
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The number of failed SSH connections before a host is designated as
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guessing passwords.
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