Rating:

## Beginner/Beginner-menace (716 solves)
Created by: `cy4n1d3`

> Go off now and enjoy the 2 days of unlimited fun.

We are supplied a JPEG only, called `friend.jpeg`. My first thought is to check EXIF on the JPEG.

```
$ exiftool friend.jpeg
ExifTool Version Number : 12.70
File Name : friend.jpeg
Directory : .
File Size : 6.5 kB
File Modification Date/Time : 2023:12:16 01:26:43+11:00
File Access Date/Time : 2023:12:16 01:26:46+11:00
File Inode Change Date/Time : 2023:12:18 22:37:13+11:00
File Permissions : -rw-rw-r--
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
JFIF Version : 1.01
Exif Byte Order : Big-endian (Motorola, MM)
X Resolution : 1
Y Resolution : 1
Resolution Unit : None
Artist : flag{7h3_r34l_ctf_15_7h3_fr13nd5_w3_m4k3_al0ng}
Y Cb Cr Positioning : Centered
Image Width : 266
Image Height : 190
Encoding Process : Baseline DCT, Huffman coding
Bits Per Sample : 8
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:0 (2 2)
Image Size : 266x190
Megapixels : 0.051
```
Looking at the EXIF, the `Artist` entry has the flag for us!

**Files:** [public.zip](https://web.archive.org/web/20231218155548/https://backdoor.infoseciitr.in/uploads?key=935d06c93ab91abc73a5937c28c1c63e61e22f25452166acb106b003806b11c2%2Fpublic.zip)

Original writeup (https://seall.dev/posts/backdoorctf2023#beginnerbeginner-menace-716-solves).