String cheese #
Oh, a cheese stick! This was my favorite snack as a kid. My mom always called it by a different name though…
For this challenge we are provided with cheese.jpg. Given it an image the first thing I did was run exiftool just to check.
exiftool cheese.jpg
ExifTool Version Number : 12.40
File Name : cheese.jpg
Directory : .
File Size : 34 KiB
File Modification Date/Time : 2023:10:24 23:53:03+00:00
File Access Date/Time : 2023:10:25 08:19:57+00:00
File Inode Change Date/Time : 2023:10:25 08:17:00+00:00
File Permissions : -rwxrwxrwx
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
JFIF Version : 1.01
Resolution Unit : inches
X Resolution : 300
Y Resolution : 300
Exif Byte Order : Little-endian (Intel, II)
Image Description : string cheese isolated on white
Copyright : Diana Taliun
Rights : Diana Taliun
Asset ID : 626338818
Web Statement : https://www.istockphoto.com/legal/license-agreement?utm_medium=organic&utm_source=google&utm_campaign=iptcurl
Creator : Diana Taliun
Description : string cheese isolated on white
Licensor URL : https://www.istockphoto.com/photo/license-gm626338818-?utm_medium=organic&utm_source=google&utm_campaign=iptcurl
Current IPTC Digest : 8ddf79d1f57aa349c8ca4cdda9aa8277
By-line : Diana Taliun
Caption-Abstract : string cheese isolated on white
Copyright Notice : Diana Taliun
Credit : Getty Images/iStockphoto
Image Width : 612
Image Height : 408
Encoding Process : Progressive DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:4:4 (1 1)
Image Size : 612x408
Megapixels : 0.250
OK, so yeah image file, but why is an image file have execute permissions? Anyway, having done a few CTFs before I went straight to strings:
$ strings cheese.jpg | grep flag
flag{f4d9f0f70bf353f2ca23d81dcf7c9099}
Whallah
Flag
flag{f4d9f0f70bf353f2ca23d81dcf7c9099}