This write-up describe Makuhari (幕張) challenge given at SECCON 2017 final competition for domestic teams.
The following 2 binaries were provided.
- dooriccreaderapp_v1
- 5ba48b4bb315b33250b812fb0deefdda5aac19d2db07d9bf26239215d4c51dfc
- ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, with debug_info, not stripped
- doorlockctlapp_v1