Tamilctf2021 Steganography writeup.
Tamilctf2021 link : https://exploiteverythingtamil.github.io/
challenge link: stegnanba
$whoami : I’m Paul Jeremiah 18/yo N00b, CTFer, 👨🏻💻
Challenge Name : Stegnanba
solution :
- The Given file is with the extension of “.jpg”.
- the $file says JPEG YES!
4. You can Get some comments and lots of information, Artist Tag looks weird nothing but base64 :).
- artist : dDRtMWw0bmQ0Cg== ok,
┌──(p4ul㉿none)-[~/ctf/tamil-ctf]
└─$ echo “dDRtMWw0bmQ0Cg==” | base64 -d
output: t4m1l4nd4
The challenge name is stegnanba :)
Stegnanba (steghide) is the hero here, not vanakam nanba! .
Steghide is a steganography program that allows you to hide confidential files inside an image or audio file with a passphrase
┌──(p4ul㉿none)-[~/ctf/tamil-ctf]
└─$ steghide extract -sf stegnanba.jpg
Enter the password: (t4m1l4nd4)
flag.txt is written by steghide successfully
> flag.txt contain double encoded base64 ; Lets Decrypt
We Got The Flag
Flag : TamilCTF{s73g_m3_p13453_3153_\I11_c4ll_vn}
That's all :)
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