Bsides Ctf Blink
by eshaan7
Challenge: Blink(for 50 points)
Description:
Get past the Jedi mind trick to find the flag you are looking for.
File: blink.apk
On installing the app on a mobile, we see this:
Then I used apktool to decompile it.
apktool d blink.apk
Going into the smali folder created by apktool
blink/smali/com/example/blink
There’s a r2d2.smali file. Inside there’s a string of base64 encoded image.
I saved the string to blink_r2d2.txt
cat blink_r2d2.txt | base64 -d > flag.png
On decoding the base64 string, and we get an image and the flag.
