NCS Competition 2021 Writeup
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NCS Competition 2021 Writeup
HHousen National Cyber Scholarship Competition 2021 Writeup
Forensics
FE02 - 100pts
FE03 - 100pts
FH01 - 500pts
FE04 - 100pts
FM01 - 250pts
FM02 - 250pts
FM03 - 250pts
FE01 - 100pts
Crypto
Binary
Networking
Web
Challenge Name
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FM01 - 250pts

Briefing

Download the file and find a way to get the flag. Contents: fm01.jpg
Challenge Files:

Solution

  1. 1.
    The flag is embedded in the metadata of the image. This can be easily solved by finding strings in fm01.jpg and searching for flag: strings fm01.jpg | grep Flag to find flag: tr4il3r_p4rk in the metadata for a Photoshop layer name.
  2. 2.
    Alternatively, simply use exiftool to see the flag in a nice layout of the metadata by running exiftool fm01.jpg:
    1
    ...
    2
    History Software Agent : Adobe Photoshop 22.2 (Windows), Adobe Photoshop 22.2 (Windows)
    3
    History Changed : /, /
    4
    Text Layer Name : flag: tr4il3r_p4rk
    5
    Text Layer Text : flag: tr4il3r_p4rk
    6
    Document Ancestors : E25BCF5D355B2F2CE5EB55EC6B67C7AF
    7
    Image Width : 1920
    8
    ...
    Copied!

Flag

tr4il3r_p4rk
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FM02 - 250pts
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Contents
Briefing
Solution
Flag