Le Mystère du roman d’amour
We are given a swp file in this challenge.
A .swpfile is a Vim Swap file. It is created by the Vim text editor whenever somebody opens a file to edit. This temporary file stores modifications made to the original document and safeguards it in case of unexpected crashes or system malfunctions.
By using the file command we can retrieve some useful information
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$ file fichier-etrange.swp
fichier-etrange.swp: Vim swap file, version 7.4, pid 168, user jaqueline, host aime_ecrire, file ~jaqueline/Documents/Livres/404 Histoires d'Amour pour les bibliophiles au coeur d'artichaut/brouillon.txt
The PID is 168, the Rouletabille’s friend’s name is jaqueline, the hostname is aime_ecrire and the full path to the file is ~jaqueline/Documents/Livres/404 Histoires d'Amour pour les bibliophiles au coeur d'artichaut/brouillon.txt.
Vim has the ability to recover data from swp files and we can try it
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vim -r fichier-etrange.swp
Using swap file "fichier-etrange.swp"
Original file "~jaqueline/Documents/Livres/404 Histoires d'Amour pour les biblio
"~jaqueline/Documents/Livres/404 Histoires d'Amour pour les bibliophiles au coeu
r d'artichaut/brouillon.txt" [New DIRECTORY]
Recovery completed. You should check if everything is OK.
(You might want to write out this file under another name
and run diff with the original file to check for changes)
You may want to delete the .swp file now.
Press ENTER or type command to continue
[Press enter]
In vim we can use :w img.png to save the recovery file into img.png
Try searching for hidden information in images using the website https://www.aperisolve.com/. We find the qr code as follows
Scan this QR, we get
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Il était une fois, dans un village rempli d'amour, deux amoureux qui s'aimaient...
Bien joué ! Notre écrivaine va pouvoir reprendre son chef-d'oeuvre grâce à vous !
Voici ce que vous devez rentrer dans la partie "contenu du fichier" du flag : 3n_V01L4_Un_Dr0l3_D3_R0m4N
Flag: 404CTF{168-~jaqueline/Documents/Livres/404 Histoires d'Amour pour les bibliophiles au coeur d'artichaut/brouillon.txt-jaqueline-aime_ecrire-3n_V01L4_Un_Dr0l3_D3_R0m4N}