reversehard
locked-in
dicectf_2026
Task: Custom stack-based VM with 16 threads verifies 30-char flag via maze navigation. Solution: Reverse-engineered VM opcodes, discovered LIFO processing order reverses input, used BFS to solve maze and invert transformation pipeline.
$ ls tags/ techniques/
vm_opcode_reverse_engineeringstack_emulationmaze_bfs_pathfindingtransformation_pipeline_inversionreverse_processing_order_discoveryfutex_channel_communication_tracingconstant_extraction_via_emulation
🔒
Permission denied (requires tier.pro)
Sign in to access full writeups
Create a free account with GitHub, then upgrade to Pro.
$ssh [email protected]