Downloads:

2,858

Downloads of v 4.1.1:

443

Last Update:

24 May 2021

Package Maintainer(s):

Software Author(s):

  • Yara Team.

Tags:

yara pattern matching malware research

Yara

  • 1
  • 2
  • 3

4.1.1 | Updated: 24 May 2021

Downloads:

2,858

Downloads of v 4.1.1:

443

Maintainer(s):

Software Author(s):

  • Yara Team.

  • 1
  • 2
  • 3
Yara 4.1.1

  • 1
  • 2
  • 3

Some Checks Have Failed or Are Not Yet Complete

Not All Tests Have Passed


Validation Testing Passed


Verification Testing Passed

Details

Scan Testing Resulted in Flagged as a Note:

At least one file within this package has greater than 0 detections, but less than 5

Details

To install Yara, run the following command from the command line or from PowerShell:

>

To upgrade Yara, run the following command from the command line or from PowerShell:

>

To uninstall Yara, run the following command from the command line or from PowerShell:

>

NOTE: This applies to both open source and commercial editions of Chocolatey.

1. Ensure you are set for organizational deployment

Please see the organizational deployment guide

  • Open Source or Commercial:
    • Proxy Repository - Create a proxy nuget repository on Nexus, Artifactory Pro, or a proxy Chocolatey repository on ProGet. Point your upstream to https://community.chocolatey.org/api/v2. Packages cache on first access automatically. Make sure your choco clients are using your proxy repository as a source and NOT the default community repository. See source command for more information.
    • You can also just download the package and push it to a repository Download

3. Enter your internal repository url

(this should look similar to https://community.chocolatey.org/api/v2)

4. Choose your deployment method:


choco upgrade yara -y --source="'STEP 3 URL'" [other options]

See options you can pass to upgrade.

See best practices for scripting.

Add this to a PowerShell script or use a Batch script with tools and in places where you are calling directly to Chocolatey. If you are integrating, keep in mind enhanced exit codes.

If you do use a PowerShell script, use the following to ensure bad exit codes are shown as failures:


choco upgrade yara -y --source="'STEP 3 URL'"
$exitCode = $LASTEXITCODE

Write-Verbose "Exit code was $exitCode"
$validExitCodes = @(0, 1605, 1614, 1641, 3010)
if ($validExitCodes -contains $exitCode) {
  Exit 0
}

Exit $exitCode

- name: Ensure yara installed
  win_chocolatey:
    name: yara
    state: present
    version: 4.1.1
    source: STEP 3 URL

See docs at https://docs.ansible.com/ansible/latest/modules/win_chocolatey_module.html.


chocolatey_package 'yara' do
  action    :install
  version  '4.1.1'
  source   'STEP 3 URL'
end

See docs at https://docs.chef.io/resource_chocolatey_package.html.


Chocolatey::Ensure-Package
(
    Name: yara,
    Version: 4.1.1,
    Source: STEP 3 URL
);

Requires Otter Chocolatey Extension. See docs at https://inedo.com/den/otter/chocolatey.


cChocoPackageInstaller yara
{
   Name     = 'yara'
   Ensure   = 'Present'
   Version  = '4.1.1'
   Source   = 'STEP 3 URL'
}

Requires cChoco DSC Resource. See docs at https://github.com/chocolatey/cChoco.


package { 'yara':
  provider => 'chocolatey',
  ensure   => '4.1.1',
  source   => 'STEP 3 URL',
}

Requires Puppet Chocolatey Provider module. See docs at https://forge.puppet.com/puppetlabs/chocolatey.


salt '*' chocolatey.install yara version="4.1.1" source="STEP 3 URL"

See docs at https://docs.saltstack.com/en/latest/ref/modules/all/salt.modules.chocolatey.html.

5. If applicable - Chocolatey configuration/installation

See infrastructure management matrix for Chocolatey configuration elements and examples.

This package was approved as a trusted package on 24 May 2021.

Description

YARA in a nutshell

YARA is a tool aimed at (but not limited to) helping malware researchers to identify and classify malware samples. With YARA you can create descriptions of malware families (or whatever you want to describe) based on textual or binary patterns. Each description, a.k.a rule, consists of a set of strings and a boolean expression which determine its logic. Let's see an example:

rule silent_banker : banker { meta: description = "This is just an example" thread_level = 3 in_the_wild = true strings: $a = {6A 40 68 00 30 00 00 6A 14 8D 91} $b = {8D 4D B0 2B C1 83 C0 27 99 6A 4E 59 F7 F9} $c = "UVODFRYSIHLNWPEJXQZAKCBGMT" condition: $a or $b or $c }

The above rule is telling YARA that any file containing one of the three strings must be reported as silent_banker. This is just a simple example, more complex and powerful rules can be created by using wild-cards, case-insensitive strings, regular expressions, special operators and many other features that you'll find explained in YARA's documentation.

YARA is multi-platform, running on Windows, Linux and Mac OS X, and can be used through its command-line interface or from your own Python scripts with the yara-python extension.

If you plan to use YARA to scan compressed files (.zip, .tar, etc) you should take a look at yextend, a very helpful extension to YARA developed and open-sourced by Bayshore Networks.

Additional resources

If you plan to use YARA to scan compressed files (.zip, .tar, etc) you should take a look at yextend, a very helpful extension to YARA developed and open-sourced by Bayshore Networks.

Additionally, they guys from InQuest have curated an aweseome list of YARA-related stuff.


legal\LICENSE.txt

From: https://raw.githubusercontent.com/VirusTotal/yara/master/COPYING

LICENSE

Copyright (c) 2007-2016. The YARA Authors. All Rights Reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
legal\VERIFICATION.txt
VERIFICATION
 
Verification is intended to assist the Chocolatey moderators and community
in verifying that this package's contents are trustworthy.
 
Package can be verified like this:
 
1. Download:
 
   x32: https://github.com/VirusTotal/yara/releases/download/v4.1.1/yara-v4.1.1-1635-win32.zip
   x64: https://github.com/VirusTotal/yara/releases/download/v4.1.1/yara-v4.1.1-1635-win64.zip
  
2. You can use one of the following methods to obtain the SHA256 checksum:
   - Use powershell function 'Get-FileHash'
   - Use Chocolatey utility 'checksum.exe'
 
   checksum type: sha256
   checksum32: 2F5F21FFA6D34E320F6DF1B60012BA4904A350396C064DEAE5A15583312A5C89
   checksum64: 18797C15F7155150D735AE7CBB5492F6F2DEF1E3EA34F2C979AEB1A005CC78F8
 
File 'LICENSE.txt' is obtained from:
   https://raw.githubusercontent.com/VirusTotal/yara/master/COPYING
tools\chocolateyinstall.ps1
$ErrorActionPreference = 'Stop';
$toolsDir   = "$(Split-Path -parent $MyInvocation.MyCommand.Definition)"

$packageArgs = @{
  packageName = $env:ChocolateyPackageName
  destination = "$toolsDir"
  file        = "$toolsDir\yara-v4.1.1-1635-win32.zip"
  file64      = "$toolsDir\yara-v4.1.1-1635-win64.zip"
}

Get-ChocolateyUnzip @packageArgs
Remove-Item -Path $packageArgs.file
tools\yara-v4.1.1-1635-win32.zip
md5: 9CD58750A51D7C9FD2991DA3AE1F910D | sha1: 44B76DD1FDEFEABC7D9049A1D960C9FE69AEE0D2 | sha256: 2F5F21FFA6D34E320F6DF1B60012BA4904A350396C064DEAE5A15583312A5C89 | sha512: ACBC35393EA9E4B71ADAAA1B021EA3A20AB9F161C4359B95BEDB8A9FA1C54112FD2DDE0B271949F706C4B4EEC767D2B44C474D85F37EB7C7030BE2E860C6A954
tools\yara-v4.1.1-1635-win64.zip
md5: 50E2D16672F21D07984BD5626047B321 | sha1: C88EA07E5F3938295ED85016944393F90A0B709B | sha256: 18797C15F7155150D735AE7CBB5492F6F2DEF1E3EA34F2C979AEB1A005CC78F8 | sha512: A15F0FCF0C0985A292A6452C21A539798AF5EBC2513E67B5C331E897404D74A82FAEC2D9E41B63D54C602100C64AAC660546416AEC63BD5E8B74A3446962E803

Log in or click on link to see number of positives.

In cases where actual malware is found, the packages are subject to removal. Software sometimes has false positives. Moderators do not necessarily validate the safety of the underlying software, only that a package retrieves software from the official distribution point and/or validate embedded software against official distribution point (where distribution rights allow redistribution).

Chocolatey Pro provides runtime protection from possible malware.

Version Downloads Last Updated Status
Yara 4.1.0 261 Monday, April 26, 2021 Approved
Yara 4.0.5 419 Friday, February 5, 2021 Approved
Yara 4.0.4 97 Wednesday, January 27, 2021 Approved
Yara 4.0.3 40 Tuesday, January 26, 2021 Approved
Yara 4.0.2 757 Friday, June 26, 2020 Approved
Yara 4.0.1 182 Friday, May 15, 2020 Approved
Yara 4.0.0 92 Wednesday, April 29, 2020 Approved
Yara 3.11.0 403 Thursday, October 10, 2019 Approved
Yara 3.10.0 164 Saturday, August 3, 2019 Approved

This package has no dependencies.

Discussion for the Yara Package

Ground Rules:

  • This discussion is only about Yara and the Yara package. If you have feedback for Chocolatey, please contact the Google Group.
  • This discussion will carry over multiple versions. If you have a comment about a particular version, please note that in your comments.
  • The maintainers of this Chocolatey Package will be notified about new comments that are posted to this Disqus thread, however, it is NOT a guarantee that you will get a response. If you do not hear back from the maintainers after posting a message below, please follow up by using the link on the left side of this page or follow this link to contact maintainers. If you still hear nothing back, please follow the package triage process.
  • Tell us what you love about the package or Yara, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.
  • If you use a url, the comment will be flagged for moderation until you've been whitelisted. Disqus moderated comments are approved on a weekly schedule if not sooner. It could take between 1-5 days for your comment to show up.
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