MINI MINI MANI MO
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<ol class="chapter"><li class="chapter-item expanded "><a href="Introduction.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li class="chapter-item expanded "><a href="manual/Installing.html"><strong aria-hidden="true">2.</strong> Installing</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="manual/Installing/Packages.html"><strong aria-hidden="true">2.1.</strong> Packages</a></li><li class="chapter-item expanded "><a href="manual/Installing/Docker.html"><strong aria-hidden="true">2.2.</strong> Docker</a></li><li class="chapter-item expanded "><a href="manual/Installing/Installing-from-source-Unix.html"><strong aria-hidden="true">2.3.</strong> Unix from source (v0.104+)</a></li><li class="chapter-item expanded "><a href="manual/Installing/Installing-from-source-Unix-old.html"><strong aria-hidden="true">2.4.</strong> Unix from source (v0.103-)</a></li><li class="chapter-item expanded "><a href="manual/Installing/Installing-from-source-Windows.html"><strong aria-hidden="true">2.5.</strong> Windows from source</a></li><li class="chapter-item expanded "><a href="manual/Installing/Community-projects.html"><strong aria-hidden="true">2.6.</strong> Community Projects</a></li><li class="chapter-item expanded "><a href="manual/Installing/Add-clamav-user.html"><strong aria-hidden="true">2.7.</strong> Add a service user account</a></li></ol></li><li class="chapter-item expanded "><a href="manual/Usage.html"><strong aria-hidden="true">3.</strong> Usage</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="manual/Usage/Configuration.html"><strong aria-hidden="true">3.1.</strong> Configuration</a></li><li class="chapter-item expanded "><a href="manual/Usage/SignatureManagement.html"><strong aria-hidden="true">3.2.</strong> Updating Signature Databases</a></li><li class="chapter-item expanded "><a href="manual/Usage/Scanning.html"><strong aria-hidden="true">3.3.</strong> Scanning</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="manual/OnAccess.html"><strong aria-hidden="true">3.3.1.</strong> On-Access Scanning</a></li></ol></li><li class="chapter-item expanded "><a href="manual/Usage/Services.html"><strong aria-hidden="true">3.4.</strong> Running ClamAV Services</a></li><li class="chapter-item expanded "><a href="manual/Usage/ReportABug.html"><strong aria-hidden="true">3.5.</strong> Report a Bug</a></li></ol></li><li class="chapter-item expanded "><a href="manual/Signatures.html"><strong aria-hidden="true">4.</strong> Signatures</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="manual/Signatures/DatabaseInfo.html"><strong aria-hidden="true">4.1.</strong> CVD Info File</a></li><li class="chapter-item expanded "><a href="manual/Signatures/DynamicConfig.html"><strong aria-hidden="true">4.2.</strong> Dynamic Configuration Settings</a></li><li class="chapter-item expanded "><a href="manual/Signatures/AuthenticodeRules.html"><strong aria-hidden="true">4.3.</strong> Trusted and Revoked EXE Certificates</a></li><li class="chapter-item expanded "><a href="manual/Signatures/FileTypeMagic.html"><strong aria-hidden="true">4.4.</strong> File Type Recognition</a></li><li class="chapter-item expanded "><a href="manual/Signatures/AllowLists.html"><strong aria-hidden="true">4.5.</strong> Allow Lists</a></li><li class="chapter-item expanded "><a href="manual/Signatures/HashSignatures.html"><strong aria-hidden="true">4.6.</strong> Hash-based Signatures</a></li><li class="chapter-item expanded "><a href="manual/Signatures/BodySignatureFormat.html"><strong aria-hidden="true">4.7.</strong> Content-based Signature Format</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="manual/Signatures/LogicalSignatures.html"><strong aria-hidden="true">4.7.1.</strong> Logical Signatures</a></li><li class="chapter-item expanded "><a href="manual/Signatures/ExtendedSignatures.html"><strong aria-hidden="true">4.7.2.</strong> Extended Signatures</a></li></ol></li><li class="chapter-item expanded "><a href="manual/Signatures/YaraRules.html"><strong aria-hidden="true">4.8.</strong> YARA Rules</a></li><li class="chapter-item expanded "><a href="manual/Signatures/PhishSigs.html"><strong aria-hidden="true">4.9.</strong> Phishing Signatures</a></li><li class="chapter-item expanded "><a href="manual/Signatures/BytecodeSignatures.html"><strong aria-hidden="true">4.10.</strong> Bytecode Signatures</a></li><li class="chapter-item expanded "><a href="manual/Signatures/ContainerMetadata.html"><strong aria-hidden="true">4.11.</strong> Container Metadata Signatures</a></li><li class="chapter-item expanded "><a href="manual/Signatures/EncryptedArchives.html"><strong aria-hidden="true">4.12.</strong> Archive Passwords (experimental)</a></li><li class="chapter-item expanded "><a href="manual/Signatures/SignatureNames.html"><strong aria-hidden="true">4.13.</strong> Signature Names</a></li></ol></li><li class="chapter-item expanded "><a href="manual/Development.html"><strong aria-hidden="true">5.</strong> For Developers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="manual/Development/github-pr-basics.html"><strong aria-hidden="true">5.1.</strong> Pull Request Basics</a></li><li class="chapter-item expanded "><a href="manual/Development/clamav-git-work-flow.html"><strong aria-hidden="true">5.2.</strong> ClamAV Git Work Flow</a></li><li class="chapter-item expanded "><a href="manual/Development/personal-forks.html"><strong aria-hidden="true">5.3.</strong> Working with Your Fork</a></li><li class="chapter-item expanded "><a href="manual/Development/testing-pull-requests.html"><strong aria-hidden="true">5.4.</strong> Reviewing Pull Requests</a></li><li class="chapter-item expanded "><a href="manual/Development/development-builds.html"><strong aria-hidden="true">5.5.</strong> Building for Development</a></li><li class="chapter-item expanded "><a href="manual/Development/build-installer-packages.html"><strong aria-hidden="true">5.6.</strong> Building the Installer Packages</a></li><li class="chapter-item expanded "><a href="manual/Development/tips-and-tricks.html"><strong aria-hidden="true">5.7.</strong> Dev Tips & Tricks</a></li><li class="chapter-item expanded "><a href="manual/Development/performance-profiling.html"><strong aria-hidden="true">5.8.</strong> Performance Profiling</a></li><li class="chapter-item expanded "><a href="manual/Development/code-coverage.html"><strong aria-hidden="true">5.9.</strong> Computing Code Coverage</a></li><li class="chapter-item expanded "><a href="manual/Development/fuzzing-sanitizers.html"><strong aria-hidden="true">5.10.</strong> Fuzzing Sanitizers</a></li><li class="chapter-item expanded "><a href="manual/Development/libclamav.html"><strong aria-hidden="true">5.11.</strong> libclamav</a></li><li class="chapter-item expanded "><a href="manual/Development/Contribute.html"><strong aria-hidden="true">5.12.</strong> Contribute</a></li></ol></li><li class="chapter-item expanded "><a href="faq/faq.html"><strong aria-hidden="true">6.</strong> Frequently Asked Questions</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="faq/faq-whichversion.html"><strong aria-hidden="true">6.1.</strong> Selecting the Right Version of ClamAV for You</a></li><li class="chapter-item expanded "><a href="faq/faq-freshclam.html"><strong aria-hidden="true">6.2.</strong> FreshClam (Signature Updater)</a></li><li class="chapter-item expanded "><a href="faq/faq-cvd.html"><strong aria-hidden="true">6.3.</strong> Signature Database (CVD)</a></li><li class="chapter-item expanded "><a href="faq/faq-misc.html"><strong aria-hidden="true">6.4.</strong> Misc</a></li><li class="chapter-item expanded "><a href="faq/faq-ml.html"><strong aria-hidden="true">6.5.</strong> Mailing Lists</a></li><li class="chapter-item expanded "><a href="faq/faq-safebrowsing.html"><strong aria-hidden="true">6.6.</strong> Safe Browsing</a></li><li class="chapter-item expanded "><a href="faq/faq-troubleshoot.html"><strong aria-hidden="true">6.7.</strong> Troubleshooting</a></li><li class="chapter-item expanded "><a href="faq/faq-scan-alerts.html"><strong aria-hidden="true">6.8.</strong> Interpreting Scan Alerts</a></li><li class="chapter-item expanded "><a href="faq/faq-upgrade.html"><strong aria-hidden="true">6.9.</strong> Upgrading</a></li><li class="chapter-item expanded "><a href="faq/faq-rust.html"><strong aria-hidden="true">6.10.</strong> Rust</a></li><li class="chapter-item expanded "><a href="faq/faq-win32.html"><strong aria-hidden="true">6.11.</strong> Win32</a></li><li class="chapter-item expanded "><a href="faq/faq-pua.html"><strong aria-hidden="true">6.12.</strong> PUA (Potentially Unwanted Application)</a></li><li class="chapter-item expanded "><a href="faq/faq-ignore.html"><strong aria-hidden="true">6.13.</strong> Ignore</a></li><li class="chapter-item expanded "><a href="faq/faq-uninstall.html"><strong aria-hidden="true">6.14.</strong> Uninstall</a></li><li class="chapter-item expanded "><a href="faq/faq-eol.html"><strong aria-hidden="true">6.15.</strong> ClamAV EOL Policy</a></li><li class="spacer"></li></ol></li><li class="chapter-item expanded "><a href="community_resources/CommunityResources.html"><strong aria-hidden="true">7.</strong> Community Resources</a></li><li class="spacer"></li><li class="chapter-item expanded "><a href="appendix/Appendix.html"><strong aria-hidden="true">8.</strong> Appendix</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="appendix/Terminology.html"><strong aria-hidden="true">8.1.</strong> Terminology</a></li><li class="chapter-item expanded "><a href="appendix/CvdPrivateMirror.html"><strong aria-hidden="true">8.2.</strong> Hosting a Private Database Mirror</a></li><li class="chapter-item expanded "><a href="appendix/Authenticode.html"><strong aria-hidden="true">8.3.</strong> Microsoft Authenticode Signature Verification</a></li><li class="chapter-item expanded "><a href="appendix/FileTypes.html"><strong aria-hidden="true">8.4.</strong> ClamAV File Types and Target Types</a></li><li class="chapter-item expanded "><a href="appendix/FunctionalityLevels.html"><strong aria-hidden="true">8.5.</strong> ClamAV Versions and Functionality Levels</a></li></ol></li></ol>
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<h1 class="menu-title">ClamAV Documentation</h1>
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<h1 id="clamav"><a class="header" href="#clamav">ClamAV</a></h1>
<p align="center">
<a href="https://www.clamav.net/">
<img align="center" width="250" height="250" src="https://raw.githubusercontent.com/micahsnyder/clamav-documentation/main/src/images/logo.png" alt='Maeve, the ClamAV mascot'>
</a>
</p>
<p>ClamAV is an open source (GPLv2) anti-virus toolkit, designed especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. The core of the package is an anti-virus engine available in a form of shared library.</p>
<blockquote>
<p><em>Tip</em>: ClamAV is not a traditional anti-virus or endpoint security suite. For a fully featured modern endpoint security suite, check out <em>Cisco Secure Endpoint</em>. See <a href="#related-products">"related products"</a>, below, for more details.</p>
</blockquote>
<p>ClamAV is brought to you by Cisco Systems, Inc.</p>
<h2 id="community-projects"><a class="header" href="#community-projects">Community Projects</a></h2>
<p>ClamAV has a diverse ecosystem of <a href="manual/Installing/Community-projects.html">community projects, products, and other tools</a> that either depend on ClamAV to provide malware detection capabilities or supplement ClamAV with new features such as improved support for 3rd party signature databases, graphical user interfaces (GUI), and more.</p>
<h2 id="features"><a class="header" href="#features">Features</a></h2>
<ul>
<li>ClamAV is designed to scan files quickly.</li>
<li>Real time protection (Linux only). The ClamOnAcc client for the ClamD scanning daemon provides on-access scanning on modern versions of Linux. This includes an optional capability to block file access until a file has been scanned (on-access prevention).</li>
<li>ClamAV detects millions of viruses, worms, trojans, and other malware, including Microsoft Office macro viruses, mobile malware, and other threats.</li>
<li>ClamAV's bytecode signature runtime, powered by either LLVM or our custom bytecode interpreter, allows the ClamAV signature writers to create and distribute very complex detection routines and remotely enhance the scanner’s functionality.</li>
<li>Signed signature databases ensure that ClamAV will only execute trusted signature definitions.</li>
<li>ClamAV scans within archives and compressed files but also protects against archive bombs. Built-in archive extraction capabilities include:
<ul>
<li>Zip (including SFX, excluding some newer or more complex extensions)</li>
<li>RAR (including SFX, most versions)</li>
<li>7Zip</li>
<li>ARJ (including SFX)</li>
<li>Tar</li>
<li>CPIO</li>
<li>Gzip</li>
<li>Bzip2</li>
<li>DMG</li>
<li>IMG</li>
<li>ISO 9660</li>
<li>PKG</li>
<li>HFS+ partition</li>
<li>HFSX partition</li>
<li>APM disk image</li>
<li>GPT disk image</li>
<li>MBR disk image</li>
<li>XAR</li>
<li>XZ</li>
<li>Microsoft OLE2 (Office documments)</li>
<li>Microsoft OOXML (Office documments)</li>
<li>Microsoft Cabinet Files (including SFX)</li>
<li>Microsoft CHM (Compiled HTML)</li>
<li>Microsoft SZDD compression format</li>
<li>HWP (Hangul Word Processor documents)</li>
<li>BinHex</li>
<li>SIS (SymbianOS packages)</li>
<li>AutoIt</li>
<li>InstallShield</li>
<li>ESTsoft EGG</li>
</ul>
</li>
<li>Supports Windows executable file parsing, also known as Portable Executables (PE) both 32/64-bit, including PE files that are compressed or obfuscated with:
<ul>
<li>AsPack</li>
<li>UPX</li>
<li>FSG</li>
<li>Petite</li>
<li>PeSpin</li>
<li>NsPack</li>
<li>wwpack32</li>
<li>MEW</li>
<li>Upack</li>
<li>Y0da Cryptor</li>
</ul>
</li>
<li>Supports ELF and Mach-O files (both 32 and 64-bit)</li>
<li>Supports almost all mail file formats</li>
<li>Support for other special files/formats includes:
<ul>
<li>HTML</li>
<li>RTF</li>
<li>PDF</li>
<li>Files encrypted with CryptFF and ScrEnc</li>
<li>uuencode</li>
<li>TNEF (winmail.dat)</li>
</ul>
</li>
<li>Advanced database updater with support for scripted updates, digital signatures and DNS based database version queries</li>
</ul>
<blockquote>
<p><em>Disclaimer</em>: Many of the above file formats continue to evolve. Executable packing and obfuscation tools in particular are constantly changing. We cannot guarantee that we can unpack or extract every version or variant of the listed formats.</p>
</blockquote>
<h2 id="license"><a class="header" href="#license">License</a></h2>
<p>ClamAV is licensed under the GNU General Public License, Version 2.</p>
<h2 id="supported-platforms"><a class="header" href="#supported-platforms">Supported platforms</a></h2>
<p>Clam AntiVirus is highly cross-platform. The development team cannot test every OS, so we have chosen to test ClamAV using the two most recent Long Term Support (LTS) versions of each of the most popular desktop operating systems. Our regularly tested operating systems include:</p>
<ul>
<li>GNU/Linux
<ul>
<li>Alpine
<ul>
<li>3.11 (64bit)</li>
</ul>
</li>
<li>Ubuntu
<ul>
<li>18.04 (64bit, 32bit)</li>
<li>20.04 (64bit)</li>
</ul>
</li>
<li>Debian
<ul>
<li>9 (64bit, 32bit)</li>
<li>10 (64bit, 32bit)</li>
</ul>
</li>
<li>CentOS
<ul>
<li>7 (64bit, 32bit)</li>
<li>8 (64bit)</li>
</ul>
</li>
<li>Fedora
<ul>
<li>30 (64bit)</li>
<li>31 (64bit)</li>
</ul>
</li>
<li>openSUSE
<ul>
<li>Leap (64bit)</li>
</ul>
</li>
</ul>
</li>
<li>UNIX
<ul>
<li>FreeBSD
<ul>
<li>11 (64bit)</li>
<li>12 (64bit)</li>
</ul>
</li>
<li>macOS
<ul>
<li>10.13 High Sierra (x86_64)</li>
<li>10.15 Catalina (x86_64)</li>
<li>11.5 Big Sur (x86_64, arm64)</li>
</ul>
</li>
</ul>
</li>
<li>Windows
<ul>
<li>7 (64bit, 32bit)</li>
<li>10 (64bit, 32bit)</li>
</ul>
</li>
</ul>
<h2 id="recommended-system-requirements"><a class="header" href="#recommended-system-requirements">Recommended System Requirements</a></h2>
<p>The following minimum recommended system requirements are for using ClamScan or ClamD applications with the standard ClamAV signature database provided by Cisco.</p>
<p>Minimum recommended RAM for ClamAV:</p>
<ul>
<li>FreeBSD and Linux server edition: 2 GiB+</li>
<li>Linux non-server edition: 2 GiB+</li>
<li>Windows 7 & 10 32-bit: 2 GiB+</li>
<li>Windows 7 & 10 64-bit: 3 GiB+</li>
<li>macOS: 3 GiB+</li>
</ul>
<p>Minimum recommended CPU for ClamAV:</p>
<ul>
<li>1 CPU at 2.0 Ghz+</li>
</ul>
<p>Minimum available hard disk space required:</p>
<p>For the ClamAV application we recommend having 5 GB of free space available. This recommendation is in addition to the recommended disk space for each OS.</p>
<blockquote>
<p><em>Note</em>: The tests to determine these minimum requirements were performed on systems that were not running other applications. If other applications are being run on the system, additional resources will be required in addition to our recommended minimums.</p>
</blockquote>
<h2 id="mailing-lists-and-chat"><a class="header" href="#mailing-lists-and-chat">Mailing Lists and Chat</a></h2>
<p>If you have a trouble installing or using ClamAV try asking on our mailing lists. There are four lists available:</p>
<ul>
<li><strong>clamav-announce (at) lists.clamav.net</strong>
<ul>
<li>info about new versions, moderated.</li>
<li>Subscribers are not allowed to post to this mailing list.</li>
</ul>
</li>
<li><strong>clamav-users (at) lists.clamav.net</strong>
<ul>
<li>user questions</li>
</ul>
</li>
<li><strong>clamav-devel (at) lists.clamav.net</strong>
<ul>
<li>technical discussions</li>
</ul>
</li>
<li><strong>clamav-virusdb (at) lists.clamav.net</strong>
<ul>
<li>database update announcements, moderated</li>
</ul>
</li>
<li><strong>clamav-binary (at) lists.clamav.net</strong>
<ul>
<li>discussion and announcements for package maintainers</li>
</ul>
</li>
</ul>
<p>You can subscribe and search the mailing list archives <a href="https://www.clamav.net/contact.html#ml">here</a>.</p>
<p>You can also join the community on our <a href="https://discord.gg/6vNAqWnVgw">ClamAV Discord chat server</a>.</p>
<h2 id="submitting-new-or-otherwise-undetected-malware"><a class="header" href="#submitting-new-or-otherwise-undetected-malware">Submitting New or Otherwise Undetected Malware</a></h2>
<p>If you've got a virus which is not detected by the current version of ClamAV using the latest signature databases, please submit the sample for review at our website:</p>
<p><a href="https://www.clamav.net/reports/malware">https://www.clamav.net/reports/malware</a></p>
<p>Likewise, if you have a benign file that is flagging as a virus and you wish to report a False Positive, please submit the sample for review at our website:</p>
<p><a href="https://www.clamav.net/reports/fp">https://www.clamav.net/reports/fp</a></p>
<h2 id="related-products"><a class="header" href="#related-products">Related Products</a></h2>
<p><a href="https://www.cisco.com/c/en/us/products/security/amp-for-endpoints/index.html">Cisco Secure Endpoint</a> (formerly AMP for Endpoints) is Cisco's cloud-based security suite for commercial and enterprise customers. Secure Endpoint is available for Windows, Linux, and macOS and provides superior malware detection capabilities, behavioral monitoring, dynamic file analysis, endpoint isolation, analytics, and threat hunting. Secure Endpoint sports a modern administrative web interface (dashboard).</p>
<p><a href="https://www.immunet.com/">Immunet</a> is a cloud-based antivirus application for Windows that is free for non-commercial use. Immunet offers great malware detection efficacy but, as a completely free product, Immunet's does not have same features or the quality user experience that Secure Endpoint offers. There is an Immunet user forum but Cisco offers no official user support.</p>
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