Reverse Engineer packed JavaScript like a Pro Using the Matching Bracket Method

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=cs7EQdWO5o0

Here I demonstrate how to reverse engineer packed JavaScript which is VERY noisy and difficult to analyse at first glance. I show you how to very quickly peel back the layers so you can get to the true logic that the bad-guy is implementing which extracts all the key IOCs from the file, including file and network indicators. • I use Sublime Text to analyse the file statically, and use the Prettify plugin to make life super-easy as it makes JavaScript much more readable. • I also show you a Matching Bracket Method which cuts through the noise by finding the end of pointless and junk functions defined in the sample. This is SUPER useful for quick analysis and will save you reverse engineering code that is never called. • Sample Reviewed: • zixmail15.js • MD5: e3decc9aa0d96ac5eb89b54b668e1f91 • https://www.virustotal.com/#/file/360... • Tools: • Sublime Text: https://www.sublimetext.com/ • Prettify Plugin: https://packagecontrol.io/packages/HT... • Node.js: https://nodejs.org/en/ • Shortcuts: • Prettify: CMD+SHIFT+h • Find Matching Bracket: CTRL+m • If you like the video, then please like my channel. • If you love the video, then please subscribe. • If you want to talk malware, follow me on / cybercdh • Enjoy!

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