We tried opening the given image and looks like there is nothing in the image. So we tried using strings
command to see if there is any hidden text in the image.
strings in_plain_sight.jpg
We got nothing from the strings command. So we tried using binwalk
to see if there is any hidden files in the image.
binwalk in_plain_sight.jpg
And we got nothing too 😅. So we tried with steghide
to see if there is any hidden files in the image.
steghide extract -sf in_plain_sight.jpg
With no password we got the file flag.txt
and the content of the file is
# almost there!
c3BhcnRhbkNURntoMWRkZW5fMW5fcGxhMW5fc2lnaHRfYWJiNTA2NWF9Cg==
We can see that the content is base64 encoded. So we decoded the content using base64
command.
echo "c3BhcnRhbkNURntoMWRkZW5fMW5fcGxhMW5fc2lnaHRfYWJiNTA2NWF9Cg==" | base64 -d
And we got the flag
spartanCTF{h1dden_1n_pla1n_sight_abb5065a}
Not solved :c
We took a quick look at the pdf and not much information was found. So we tried using strings
command to see if there is any hidden text in the pdf.
strings letter_v2.pdf | grep CTF
And we got the flag
spartanCTF{n3v3r_f0rget_th3_m3tadata_5b1bfc6e}
We took a quick look at the pem file and there is the flag in the file.
spartanCTF{w3lc0me_t0_th3_w0rld_0f_auth0r1ty}
We tried opening the given audio file and sounds like a DTMF
tone in the background. So we tried using Audacity
to see if there is any hidden text in the audio file.
We found nothing in the audio file. So we tried using DTMF
decoder to see if there is any hidden text in the audio file.
And we got this Decoded: 1151129711411697110678470123108511169510951951045211851959711712095110511201169511649109101955652985151989748125
We can see that the content is decimal encoded. So we decoded the content ASCII Decoder
and we got the flag.
And we got the flag
spartanCTF{l3t_m3_h4v3_aux_n3xt_t1me_84b33ba0}