HCSC 2024 - Sniffing

Description

Ez gáz! Vagy gaz?

Csak a zip file letöltése szükséges.

A flag formátuma: HCSC24{...}

Metadata

• Tags: strings
• Points: 200
• Number of solvers: 152
• Filename: Sniff.jpg

Solution

Let’s run strings first:

$ strings Sniff.jpg
JFIF
;CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 90
$3br
%&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz
        #3R
&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz
H.C.S.C.2.4{.t0T..a.1.-.s.Z..1...v.A.s .}
XHjd
QblW1
lPQp
[...]

There is the flag, we just need to remove the . characters (and a space character).

Flag: HCSC24{t0Ta1-sZ1vAs}