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asarfix

v0.1.0

Published

Fixes/Decrypts asar archives protected by asarmor and asarbreak

Downloads

56

Vulnerabilities

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Links

Git

Maintainers

j4k0xbj4k0xb

Keywords

asarasarbreakasarmor

Readme

asarfix

Fixes/Decrypts asar archives protected by asarmor and asarbreak.

npx asarfix app.asar -o out.asar
npx asar extract out.asar out

Decryption

Asarmor uses AES-128-CBC to encrypt .js files in the asar archive. The encryption key is stored in one of these binaries:

  • electron-forge: resources/app.asar.unpacked/.vite/build/main.node
  • electron-builder: resources/app.asar.unpacked/dist/main.node
npx asarfix app.asar -o out.asar -b <path to main.node>

The key may also be available in plaintext: node_modules/asarmor/src/encryption/key.txt.

Bypass Debugging Protection

https://github.com/sleeyax/asarmor/blob/2c91d08ba0a00d379d26e7dfb89aa0f1d3b8e05c/src/encryption/main.cpp#L172-L173

It checks process.argv, but we can also debug by using the NODE_OPTIONS=--inspect environment variable.