slutter

What do you do if you encounter Flutter on Linux?

./ ├── data │ ├── flutter_assets │ │ ├── AssetManifest.bin │ │ ├── AssetManifest.json │ │ ├── FontManifest.json │ │ ├── NOTICES.Z │ │ ├── fonts │ │ │ └── MaterialIcons-Regular.otf │ │ ├── kernel_blob.bin │ │ ├── packages │ │ │ └── cupertino_icons │ │ │ └── assets │ │ │ └── CupertinoIcons.ttf │ │ ├── shaders │ │ │ └── ink_sparkle.frag │ │ └── version.json │ └── icudtl.dat ├── lib │ └── libflutter_linux_gtk.so └── slutter

file ./slutter ./slutter: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=c77dcc8e7423c8e589ceca8752cadcc937408f1d, for GNU/Linux 4.4.0, with debug_info, not stripped

strings kernel_blob.bin > strings.txt

if (_counter == 0x13371337) { flag = [ 70, 77, 67, 84, 70, 123, 100, 49, 68, 95, 121, 48, 117, 95, 117, 53, 51, 95, 56, 108, 117, 55, 55, 51, 82, 95, 48, 82, 95, 119, 104, 52, 55, 63, 125 ]; }

[print(chr(i),end='') for i in [70, 77, 67, 84, 70, 123, 100, 49, 68, 95, 121, 48, 117, 95, 117, 53, 51, 95, 56, 108, 117, 55, 55, 51, 82, 95, 48, 82, 95, 119, 104, 52, 55, 63, 125]]

FMCTF{d1D_y0u_u53_8lu773R_0R_wh47?}