RC3 CTF - 300 - Breaking News - Forensics

Informations

Version

By Version Comment
Chill3d 1.0 Creation

CTF

Description

N.C.

Solution

For this challenge, we have a tar.gz file which is containing 20 zip files. These ones are storing txt files. There is a story is these txt files but we can't see any 2016 string so the flag isn't here...
So, why don't examinate the content of zip files to see if we missed something... In a directory where the 20 zip files are stored, we typed : strings *

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GINg
Chapter0.txtUT
L+^=
<U<i%[
GINg
Chapter0.txtUT
Chapter10.txtUT
Chapter10.txtUT
MTYtRFUK
Chapter11.txtUT
;X c
`s;
(yCc
_/_PK
Chapter11.txtUT
Chapter12.txtUT
Wow, these Queebloid folks do not fool around.
Chapter12.txtUT
Chapter13.txtUT
H,Q/V(
,Q(NM
Chapter13.txtUT
Chapter14.txtUT
0gZ+
?6(U
Chapter14.txtUT
Chapter15.txtUT
Y*mO
.Xt]
3oc$M8e
Chapter15.txtUT
S1lGCg==
Chapter16.txtUT
2VD%
Chapter16.txtUT
Chapter17.txtUT
6[in
Chapter17.txtUT
Chapter18.txtUT
,QH,(HM,*V(
Chapter18.txtUT
QkxTCg==
Chapter19.txtUT
*Cut to black*
Chapter19.txtUT
Chapter1.txtUT
D{N1
!Rk\
^hE3n
Chapter1.txtUT
GIKZo=f
Chapter2.txtUT
GIKZo=f
Chapter2.txtUT
Chapter3.txtUT
Chapter3.txtUT
Chapter4.txtUT
Chapter4.txtUT
UkMK
Chapter5.txtUT
\DjX
pZzU
NR!R9
K4r>&
Chapter5.txtUT
Chapter6.txtUT
Chapter6.txtUT
Chapter7.txtUT
Chapter7.txtUT
Chapter8.txtUT
Chapter8.txtUT
Chapter9.txtUT
K)VH,JU(
Chapter9.txtUT
My0yMAo=

Some base64 encoded strings ?! Let decode MTYtRFUK + S1lGCg== + QkxTCg== + UkMK + My0yMAo=:

  • MTYtRFUK : 16-DU
  • S1lGCg== : KYF
  • QkxTCg== : BLS
  • UkMK : RC
  • My0yMAo= : 3-20

So, if we put strings in order of chapter number, we obtain the flag RC3-2016-DUKYFBLS.

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