Archaic
Category: misc
50 points
The archaeological team at ångstromCTF has uncovered an archive from over 100 years ago! Can you read the contents?
Access the file at /problems/2021/archaic/archive.tar.gz on the shell server.
Author: kmh
Solution
Welcome to the
_ _ __
() | | | | / _|
__ _ _ __ __ _ ___| |_ _ __ ___ _ __ ___ ___| |_| |_
/ _` | '_ \ / _` / __| __| '__/ _ \| '_ ` _ \ / __| __| _|
| (_| | | | | (_| \__ \ |_| | | (_) | | | | | | (__| |_| |
\__,_|_| |_|\__, |___/\__|_| \___/|_| |_| |_|\___|\__|_|
__/ |
|___/
shell server!
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team7784@actf:~$ cp /problems/2021/archaic/archive.tar.gz ./
team7784@actf:~$ tar xvzf archive.tar.gz
flag.txt
tar: flag.txt: implausibly old time stamp 1921-04-01 22:45:12
team7784@actf:~$ ll
total 68
drwx------ 3 team7784 team7784 4096 Apr 3 08:15 ./
drwx--x--x 1087 root root 36864 Apr 3 08:13 ../
-rw-r--r-- 1 team7784 team7784 220 Feb 25 2020 .bash_logout
-rw-r--r-- 1 team7784 team7784 3771 Feb 25 2020 .bashrc
drwx------ 2 team7784 team7784 4096 Mar 29 14:31 .cache/
-rw-r--r-- 1 team7784 team7784 807 Feb 25 2020 .profile
-r--r--r-- 1 team7784 team7784 150 Apr 3 08:15 archive.tar.gz
---------- 1 team7784 team7784 37 Apr 1 1921 flag.txt
team7784@actf:~$ cat flag.txt
cat: flag.txt: Permission denied
team7784@actf:~$ chmod +r flag.txt
team7784@actf:~$ cat flag.txt
actf{thou_hast_uncovered_ye_ol_fleg}Flag
actf{thou_hast_uncovered_ye_ol_fleg}