Yugami

At a glance

• Editor score
  5.8 / 10
• Pricing
  Open source
• Best for
  Experimental encrypted x64 PE packing
• Paid from
  Free
• Protection features
  Yes
• Facts checked
  20 Sep 2026

• Where it wins

  • ChaCha20 encryption with BLAKE3-derived page keys
  • Just-in-time decryption triggered by page faults
  • PE overlay embedding with an LRU cache of up to 256 pages

• Where it doesn't

  • Supports Windows x64 PE payloads only
  • Requires a Cargo workspace build and command-line workflow
  • Focuses on encryption and runtime protection rather than compression

Our verdict on Yugami

Yugami is an open-source command-line binary packer written in Rust for Windows x64 Portable Executable payloads. It is aimed at developers and researchers exploring encrypted executable packing, page-level loading, and runtime memory protection. The workflow centers on producing a packed.exe output from a PE payload through a Cargo workspace build, rather than offering a graphical packaging experience.

Its standout capability is page-oriented payload handling. Yugami encrypts the mapped payload with ChaCha20 and derives page keys with BLAKE3. The encrypted payload and metadata are appended as a PE overlay, while runtime pages are decrypted just in time in response to page faults. An LRU page cache can hold up to 256 pages, and the design includes memory-protection changes during loading. This gives the project a focused technical profile for examining how encrypted pages can be loaded only when needed.

The main trade-off is scope. Yugami targets Windows x64 and the PE format, so it is not suited to cross-platform binaries, other executable formats, or workflows that require broader architecture support. Its documented build and packing process is command-line based and depends on a Cargo workspace, which will appeal to Rust-oriented technical users but may add friction for users seeking a ready-to-run installer or a visual interface. Choose Yugami for experimental encrypted x64 PE packing and page-level runtime behavior; choose an alternative when compression, broader platform coverage, or a more packaged distribution workflow matters more.

Your product? Our editors can test Yugami in depth and publish a review, labelled as paid · from $149/mo →

Yugami pricing

Yugami fact sheet

Alternatives to Yugami

• Sentinel EnvelopeA broad executable-protection toolkit for vendors distributing software across major platforms.9.2
• UUPXA free, cross-platform packer with broad format support and detailed compression controls.8.9
• SCStarForce CryptoA mature Windows packer for native and managed-code protection with configurable defenses.8.7

See all Yugami alternatives →

Featured on iTechGuides

Yugami is listed in our Executable Packers directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/yugami/"><img src="https://www.itechguides.com/best/badge/yugami.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update