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tychebe
@tychebe
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2016-08-15 13:18
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tychebe
security
10y
Windows key shortcuts list
□ Win + E : Execute windows Explorer □ Win + R : Execute Windows run □ Win + T : Check program thumbnail in order at the taskbar □ Win + U : Execute ease of access center at control panel □ Win + D : Minimize
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tychebe
security
10y
Method of checking linux distribution version, kernel version
□ Command to check linux distribution type, version ○ cat /etc/*-release ○ cat /etc/issue* □ Command to check linux kernel version : uname -a It is posted also at :
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tychebe
security
10y
Checking available shell and shell depth
□ Checking Available shells : cat /etc/shells □ Environment variable for recording depth of shell : SHLVL(=SHell LeVeL) ps. Checking Shell depth : env | grpe SH SHLVL = 1 is a state that only login-shell
tychebe
security
10y
.bashrc .bash_profile difference
□ .bashrc : Bash shell configuration file. It is loaded when you execute Bash shell with no-login □ .bash_profile : Bash shell configuration file. It is loaded when you login with bash shell You can see
tychebe
security
10y
Function setresuid/setresgid
□ setresuid/setresgid : SET R(eal), E(ffective), S(aved) UID/GID □ It changes permission of currently active processes. □ man page : Also posted at :
tychebe
security
10y
Nebula Level01 solution
After login, Go to "home / flag01" path, you can see the flag01 file. setuid is set. And when you execute the file, It prints out "and now what?". Through a given source, it can be expected the following
tychebe
security
10y
Nebula Level00 solution
1. Login level00(Check login status using whoami command) 2. Insert command : find / -perm -4000 -user flag00 -exec ls -al 1> ~/00result.txt 2> /dev/null {} \; A. find : Command to search for files
tychebe
security
10y
Introduction to Nebula
Introduction to Nebula
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