Ninja Skills

#Task 1 Ninja Skills 
- Which of the above files are owned by the best-group group(enter the answer separated by spaces in alphabetical order)
hint: https://www.tecmint.com/35-practical-examples-of-linux-find-command/
find / -type f \( -name 8V2L -o -name bny0 -o -name c4ZX -o -name D8B3 -o -name FHl1 -o -name oiM0 -o -name PFbD -o -name rmfX -o -name SRSq -o -name uqyw -o -name v2Vb -o -name X1Uy \) 2>>/dev/null
search folder in "best-group"
find / -group best-group 2>/dev/nul
or find / -ls 2>/dev/null | grep -w -e 8V2L -e bny0 -e c4ZX -e D8B3 -e FHl1 -e oiMO -e PFbD -e rmfX -e SRSq -e uqyw -e v2Vb -e X1Uy | grep "best-group"
find / -type f \( -name 8V2L -o -name bny0 -o -name c4ZX -o -name D8B3 -o -name FHl1 -o -name oiMO -o -name PFbD -o -name rmfX -o -name SRSq -o -name uqyw -o -name v2Vb -o -name X1Uy \) -exec ls -ilrt {} \; 2>>/dev/null
d8b3 v2vb


- Which of these files contain an IP address?
hint: https://www.shellhacks.com/regex-find-ip-addresses-file-grep/
find / 2>/dev/null | grep -w -e 8V2L -e bny0 -e c4ZX -e D8B3 -e FHl1 -e oiMO -e PFbD -e rmfX -e SRSq -e uqyw -e v2Vb -e X1Uy | sort >> note.txt
There is only one missing is “bny0” file.
find / -exec grep "*bny0*" {} \; 2>/dev/null
Takes too long.. Never mind.. just proceed
cat note.txt | while read line; do echo $line; cat $line | grep -Eo "([0-9]{1,3}[\.]){3}[0-9]{1,3}"; done
or
grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' $(cat note.txt)
or find / -type f \( -name 8V2L -o -name bny0 -o -name c4ZX -o -name D8B3 -o -name FHl1 -o -name oiMO -o -name PFbD -o -name rmfX -o -name SRSq -o -name uqyw -o -name v2Vb -o -name X1Uy \) -exec egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' * {} \; 2>>/dev/null
oiMO


- Which file has the SHA1 hash of 9d54da7584015647ba052173b84d45e8007eba94
hint: -exec sha1sum {} \;
or find / -type f \( -name 8V2L -o -name bny0 -o -name c4ZX -o -name D8B3 -o -name FHl1 -o -name oiMO -o -name PFbD -o -name rmfX -o -name SRSq -o -name uqyw -o -name v2Vb -o -name X1Uy \) -exec sha1sum {} \; 2>>/dev/null
cat note.txt | while read line; do echo $line; sha1sum $line | grep 9d54da7584015647ba052173b84d45e8007eba94; done
sha1sum $(cat note.txt) | grep 9d54da7584015647ba052173b84d45e8007eba94
c4ZX

- Which file contains 230 lines?
hint:-exec wc -l 230 {} \;
https://www.tecmint.com/wc-command-examples/
find / -type f \( -name 8V2L -o -name bny0 -o -name c4ZX -o -name D8B3 -o -name FHl1 -o -name oiMO -o -name PFbD -o -name rmfX -o -name SRSq -o -name uqyw -o -name v2Vb -o -name X1Uy \) -exec grep wc -l 230 {} \; 2>>/dev/null
or grep -c ^ $(cat note.txt)
bny0


- Which file's owner has an ID of 502?
hint: -exec ls -l {} \;
find / -type f \( -name 8V2L -o -name bny0 -o -name c4ZX -o -name D8B3 -o -name FHl1 -o -name oiMO -o -name PFbD -o -name rmfX -o -name SRSq -o -name uqyw -o -name v2Vb -o -name X1Uy \) -exec ls -ln {} \; 2>>/dev/null
or find / -uid 502 -ls 2>/dev/null
X1Uy


- Which file is executable by everyone?
hint: find / -ls 2>/dev/null | grep -w -e 8V2L -e bny0 -e c4ZX -e D8B3 -e FHl1 -e oiMO -e PFbD -e rmfX -e SRSq -e uqyw -e v2Vb -e X1Uy
or find / -type f \( -name 8V2L -o -name bny0 -o -name c4ZX -o -name D8B3 -o -name FHl1 -o -name oiMO -o -name PFbD -o -name rmfX -o -name SRSq -o -name uqyw -o -name v2Vb -o -name X1Uy \) -exec ls -ln {} \; 2>>/dev/null
8V2L


https://blog.wantedlink.de/?p=11613
https://qiita.com/v_avenger/items/e94e31a53258737069dd
https://dhilipsanjay.gitbook.io/ctfs/tryhackme/tryhackme/ninjaskills
https://hafiqiqmal93.medium.com/tryhackme-ninja-skills-e584016c512c
https://gitlab.com/ctf-and-walkthrough-writeups/tryhackme/-/tree/master/Ninja%20Skills