The file command already tells us the file is a JPEG image (despite the missing “.jpg” extension) and that it was saved with a setting ( quality 95 ). The hint in the challenge description therefore points directly at the JPEG compression level – a classic clue for a “high‑quality JPEG stego” where the LSBs of the DCT coefficients are still intact.
#!/usr/bin/env bash # 1. Pull LSBs from the JPEG python - <<'PY' import sys, numpy as np from jpeg2dct import jpeg2dct c = jpeg2dct('juq915', mode='coeffs') ac = [abs(v)&1 for ch in c for blk in ch for v in blk.ravel()[1:]] bits = np.packbits(ac, bitorder='little') open('juq915.lsb','wb').write(bits) PY juq915 high quality
She stepped into the center of the room, closed her eyes, and for the first time in eighteen months, she let herself listen. The file command already tells us the file