Unleash the Beast!

CTFなどのメモに使います

RADARCTF - Chars(Crypto 100)

f:id:imurasheen:20190405123851p:plain

cRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RmRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRFRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRkRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRYRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRXRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRJRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRR7RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRYRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRR2RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRhRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRhRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRcRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRlRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRR9RRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRhRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRZRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRnRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRlRRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRcRRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRlRRRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRR9RRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRjRRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRaRRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRGRRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRFRRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRyRRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRXRRRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRR2RRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRdRRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRpRRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRdRRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRmRRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRVRRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRfRRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRZRRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRmRRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRxRRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRhRRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRZRR
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR3R
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR0

Collecting diagonal characters from top-left to bottom-right.

->cmFkYXJ7Y2hhcl9hZnRlcl9jaGFyX2dpdmVfZmxhZ30

 

It looks like Base64 encoded string.

Adding '=' to the end of above string for padding, and decode it.

flag is: radar{char_after_char_give_flag}