Lesson 17: Meta data
Lesson Link:
https://cybertalents.com/learn/introduction-to-cybersecurity/lessons/17-meta-data
Introduction
Metadata is data that describes other data. It is data about data. Metadata is used to organize and describe data in a way that makes it easier to find, access, and use. Metadata is often used to describe the contents of a file, such as the title, author, and subject of a document. Metadata can also be used to describe the structure and format of a file, such as the number of pages, the font used, and the size of the file.
Challenge
Name:
Keep it Simple
Description:
The answer is simple.
Solution
If open the website, we will find it a super simple website, with image, text, and button for hint. the hint is image that says KEEP CALM AND FOCUS ON THE BASICS.
So, Lets open the page source, and we will find that it is not just a single image, but there is a hidden image. so lets Download both images, and compare them.
They are the same, but the hidden image has some metadata, so lets open it with exiftool, and we will find the flag.
if we open the first image with exiftool, we will get this output:
$ exiftool the_eye.jpeg
ExifTool Version Number : 12.23
File Name : the_eye.jpeg
Directory : .
File Size : 71 KiB
File Modification Date/Time : 2021:04:16 04:03:50+01:00
File Access Date/Time : 2021:04:16 04:03:50+01:00
File Inode Change Date/Time : 2021:04:16 04:03:50+01:00
File Permissions : -rw-r--r--
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
Image Width : 640
Image Height : 371
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 : 640x371
Megapixels : 0.237
and if we open the second image with exiftool, we will get this output:
$ exiftool index.jpeg
ExifTool Version Number : 12.23
File Name : index.jpeg
Directory : .
File Size : 73 KiB
File Modification Date/Time : 2021:04:16 04:08:56+01:00
File Access Date/Time : 2021:04:16 03:33:13+01:00
File Inode Change Date/Time : 2021:04:16 04:08:56+01:00
File Permissions : -rw-r--r--
File Type : JPEG
File Type Extension : jpg
MIME Type : image/jpeg
Exif Byte Order : Big-endian (Motorola, MM)
X Resolution : 72
Y Resolution : 72
Resolution Unit : inches
Y Cb Cr Positioning : Centered
GPS Version ID : 2.3.0.0
GPS Latitude Ref : North
GPS Longitude : 0 deg 0 0.00
GPS Altitude : 0 m
XMP Toolkit : XMP Core 5.6.0
Rights : {S1mpl3sty_i$_th_@nswer}
Current IPTC Digest : 5e3e91b2890a2a0c1f69d828fd37bc26
Coded Character Set : UTF8
Copyright Notice : {S1mpl3sty_i$_th_@nswer}
Image Width : 640
Image Height : 371
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 : 640x371
Megapixels : 0.237
GPS Latitude : 0 deg 0 0.00 N
GPS Position : 0 deg 0 0.00 N, 0 deg 0 0.00
As we can see, the second image has some metadata, and the flag is in the Rights field.
Flag
S1mpl3sty_i$th@nswer