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0xburger
MY 13:57
TICKET04/ 06

REVERSE // RUSH

Cold Recipe

Reverse a compact WebAssembly checker with one cold constant.

OPENrush

THE TICKET

Brief

The checker accepts one exact flag. Download the 149-byte module, inspect its data segment and comparison loop, then reconstruct the input.

Objective

Find the accepted flag without brute-forcing the full input space.

Module
149-byte WebAssembly
Export
check(ptr, len)
Transform
single-byte reversible

LOCAL RUNNER

Workbench

NO NETWORK
\0asmcold-recipe.wasm149 B
Download checkerexports memory + check(ptr, len)

Checker waiting for a candidate.

TEAR-OFF CLUES

Hints

No hints opened. This is not scored.

    FINAL CHECK

    SHA-256 / LOCAL

    Stamp the flag.

    The answer pass is waiting.

    Validation happens entirely on this device. No answer or activity is transmitted.