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whoknows

snapshot_blob.bin manipulation (?)

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whoknows

Nowadays applications build with Electron (look skype / ms teams +++), it uses the Chrome V8 JavaScript, the developer packs the application and publish it. Electron applications live inside the app.asar (works like tar that concatenates all files together without compression, while having random access support), using a Node addon or 7z addon you can manipulate it.. 

New technic is out, allow developers create custom startup snapshots, that stored inside the snapshot_blob.bin (Chrome V8 JavaScript), for faster startup. if you look your chrome distr on main folder a snapshot_blob.bin exists as well. 

spacer.png

and the JS function bodies in unicode :

spacer.png

 

how to extract and repack ?

sample :

https://dropmefiles.com/UQEcz

 

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