* Here is my script:
```
!#/bin/bash
for i in {1..100}
do
f=`ls -u|head -1`;
unzip -P $f $f;
done
```

* After execute the script a couple of times you will get *flag.tar*.
* Extract *flag.tar* and you will have *flags* directory.
* Then:
```
cd flags;
find -type f
```

* Doing that will return which directories contain files have their name in number.
* Then put directories in order of files numbers.
* After that convert those directories name to ascii value:

SYNT{z4ge3fux4_n5p11}

* decrypt caesar cipher and you get the flag:

FLAG{m4tr3shk4_a5c11}