Solving Flare-On 2016 Challenge 1 with Angr

Took me way too long to finally getting around to publishing this post, but here it is. Last fall, FireEye announced their 3rd annual Flare-On challenge. It's sort of a recruiting thing for them, I think -- if you solve all the challenges (and especially if you solve them quickly)…

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Solving Dakotacon 2015 RE C2 challenge with Angr

Background The motivation my last entry was to provide an easier way for me, and others, to learn more about (and use!) Angr. Well, I've finally had some time to play around with Angr, and I've been able to use it to solve two CTF challenges (as of now --…

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PoliCTF 2015 'Am I Cheating?' Reversing Writeup

This challenge was available only via the torrent -- probably because of its large size (close to 4GB). Let's go! Decompress and run Decompressing the challenge's .tar.gz gets you this: > $ file * challdeb.img: QEMU QCOW Image (v2), 6442450944 bytes qemu: directory run_and_solve_me: ELF 64-bit LSB…

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Dakotacon 2015 RE Challenge C2 Writeup

The Dakotacon C2 challenge was moderately difficult in that it actually required you to do a little programming work -- most of the other C-based challenges in this CTF allowed you to set a breakpoint at a smart place (e.g. right before strcmp()), and view the key in-memory. Instead…

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