Zeroday Cyber Research Shellcoder

ELF, Mach-O, PE — decoding every word the file command throws at you

BackdoorCTF 2016 enter the matrix: binary exploitation to reach the flag on a remote server

BackdoorCTF 2016 debug: reversing a 32-bit binary and hashing the result with SHA256

BackdoorCTF 2016 buzybee: forensics challenge extracting a flag virus from infected files

Single vs double vs no quotes — how shell expansion changes everything

BackdoorCTF 2016 imagelover: web exploitation via malicious image upload

BackdoorCTF 2016 isolve: auto-generating regex-matching strings with exrex under a time limit

BackdoorCTF 2016 jigsaw: manually reassembling 64 image pieces to decode 16 characters

BackdoorCTF 2016 intro16: collecting flag fragments from IRC and Twitter