--- title: Using the Mach-O module in YARA-X | daily.dev description: YARA-X's new macho module simplifies detecting patterns in Mach-O binaries compared to the manual byte-matching required in original YARA. The post walks... canonical: https://daily.dev/posts/using-the-mach-o-module-in-yara-x-ksjaazson twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Using the Mach-O module in YARA-X | daily.dev og:description: YARA-X's new macho module simplifies detecting patterns in Mach-O binaries compared to the manual byte-matching required in original YARA. The post walks... og:url: https://daily.dev/posts/using-the-mach-o-module-in-yara-x-ksjaazson og:image: https://api.daily.dev/og/posts/kSJAAzSOn.png og:image:alt: Using the Mach-O module in YARA-X og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Using the Mach-O module in YARA-X **[YARA-X](https://daily.dev/sources/yara-x)** · 4 min read · 0 upvotes · 0 comments ## Summary YARA-X's new macho module simplifies detecting patterns in Mach-O binaries compared to the manual byte-matching required in original YARA. The post walks through using macho.symtab, macho.imports, macho.exports, rpaths, dylibs, and entitlements, along with helper functions like has_import(), has_export(), has_rpath(), has_dylib(), and has_entitlement(). It also explains the deduplicated, sorted, lowercased MD5 hashing scheme used for hash-based detections across these structures, pointing readers to the full documentation for more detail. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I detect a specific dylib or import in a Mach-O binary using YARA-X? Use the macho module's has_dylib() function to check for a specific shared library loaded via a load command, or has_import() to check for a specific imported symbol. The macho module also exposes arrays like macho.imports and dylib structures that can be iterated directly in a YARA-X rule for more granular matching. _Developers building malware detection rules can find deep dives like this through daily.dev's tech feeds._ ### How does YARA-X hash a list of entitlements or dylibs for detection purposes? YARA-X computes an MD5 hash of the deduplicated, sorted, and lowercased entries joined by commas, such as md5("dylib_1,dylib_2,dylib_n"). This applies to categories like dylibs, imports, exports, and entitlements, allowing analysts to fingerprint a specific combination of Mach-O binary features with a single hash comparison. _Security engineers comparing binary analysis techniques can track tooling changes like this via daily.dev._ ## Similar posts on daily.dev - [One Tool to Rule Them All: File Metadata & Static Analysis for Malware Analysts and SOC Teams](https://daily.dev/posts/one-tool-to-rule-them-all-file-metadata-static-analysis-for-malware-analysts-and-soc-teams-ghxi8cskm) · InfoSec Write-ups · 0 upvotes · 0 comments - [Beware of the wildcard](https://daily.dev/posts/beware-of-the-wildcard-cnnz5ig83) · YARA-X · 0 upvotes · 0 comments - [A proactive defense against npm supply chain attacks](https://daily.dev/posts/a-proactive-defense-against-npm-supply-chain-attacks-hy7knvkqx) · InfoWorld · 0 upvotes · 0 comments - [How programs get run: ELF binaries](https://daily.dev/posts/how-programs-get-run-elf-binaries-6ybn3cbnw) · Hacker News · 1 upvotes · 0 comments - [The dark figure of supply chain detection](https://daily.dev/posts/the-dark-figure-of-supply-chain-detection-zp2a6otbz) · Aikido Security · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#malware](https://daily.dev/tags/malware), [#reverse-engineering](https://daily.dev/tags/reverse-engineering) [View this post on daily.dev](https://daily.dev/posts/using-the-mach-o-module-in-yara-x-ksjaazson) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Using the Mach-O module in YARA-X","url":"https://daily.dev/posts/using-the-mach-o-module-in-yara-x-ksjaazson","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/using-the-mach-o-module-in-yara-x-ksjaazson"},"datePublished":"2026-08-23T12:23:26.229Z","dateModified":"2026-08-23T12:59:13.862Z","description":"YARA-X's new macho module simplifies detecting patterns in Mach-O binaries compared to the manual byte-matching required in original YARA. 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