reverseProhard

locked-in

DiceCTF 2026 Quals

A custom stack-based VM interpreter (`locked_in`, ELF 64-bit, stripped, statically linked) executes bytecode (`flag_verifier.bin`, 43360 bytes) that verifies a 30-character flag in `dice{...}` format. The binary runs in Docker (ubuntu:22.04) and prints "Flag accepted" or "Flag rejected". The VM supp

$ ls tags/ techniques/
dockermazebfsxorlfsrbytecodethreadingcustom_vmstatic_binarystripped_binarystack_vmfutex
vm_opcode_reverse_engineeringstack_emulationmaze_bfs_pathfindingtransformation_pipeline_inversionreverse_processing_order_discoveryfutex_channel_communication_tracingconstant_extraction_via_emulation
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