調査
binwalkで何やら気になる感じになってる。
$ binwalk -e dolls.jpg DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 0 0x0 PNG image, 594 x 1104, 8-bit/color RGBA, non-interlaced 3226 0xC9A TIFF image data, big-endian, offset of first image directory: 8 272492 0x4286C Zip archive data, at least v2.0 to extract, compressed size: 378952, uncompressed size: 383937, name: base_images/2_c.jpg 651610 0x9F15A End of Zip archive, footer length: 22
出てきたjpgに対して改めてbinwalkする
$ binwalk -e 2_c.jpg DECIMAL HEXADECIMAL DESCRIPTION -------------------------------------------------------------------------------- 0 0x0 PNG image, 526 x 1106, 8-bit/color RGBA, non-interlaced 3226 0xC9A TIFF image data, big-endian, offset of first image directory: 8 187707 0x2DD3B Zip archive data, at least v2.0 to extract, compressed size: 196042, uncompressed size: 201444, name: base_images/3_c.jpg 383804 0x5DB3C End of Zip archive, footer length: 22 383915 0x5DBAB End of Zip archive, footer length: 22
ok.マトリョーシカね。
この要領でどんどん潜っていくと最終的にflag.txtというファイルになり、フラグが書いてある
