El Rincón de Psicopedagogía: 23/8/20

sábado, 29 de agosto de 2020

Top Users Command In Linux Operating System With Descriptive Definitions

Linux is a command line interface and has a graphical interface as well. But the only thing we should know how we interact with Linux tools and applications with the help of command line. This is the basic thing of Linux. As you can do things manually by simple clicking over the programs just like windows to open an applications. But if you don't have any idea about commands of Linux and definitely you also don't know about the Linux terminal. You cannot explore Linux deeply. Because terminal is the brain of the Linux and you can do everything by using Linux terminal in any Linux distribution. So, if you wanna work over the Linux distro then you should know about the commands as well.
In this blog you will get a content about commands of Linux which are collectively related to the system users. That means if you wanna know any kind of information about the users of the system like username passwords and many more.

id

The "id" command is used in Linux operating system for the sake of getting knowledge about active user id with login and group. There may be different users and you wanna get a particular id of the user who is active at that time so for this you just have to type this command over the terminal.

last

The "last" command is used in Linux operating system to show the information about the last logins on the system. If you forget by which user id you have logged in at last time. So for this information you can search login detail by using this command.

who

The "who" command is used in Linux distributions to display the information about the current user which a an active profile over the Linux operating system. If you are in the system and you don't know about that active user and suddenly you have to know about that user detail so you can get the info by using this command.

groupadd

The "groupadd admin" is the command which is used in Linux operating system to add a group in the Linux system to gave the privileges to that group.

useradd

The "useradd" command is used in Linux operating system to add user or users to a specific group. If you wanna add a user name Umer so for this matter you just have to write a command i.e. useradd -c "Umer".

userdel

The "userdel" command is used in Linux operating system for the purpose to delete any user or users from the particular group present in the linux operating system. For example "userdel Umer" this command will delete the user named Umer.

adduser

The "adduser" command is a simple command used to create directly any user in the system. There is no need to make a group for this. You just have to type the command with user name like adduser Umer, it will created a user by name Umer.

usermod

The "usermod" is a command used in Linux operating system to modify the information of any particular user. You can edit or delete information of any particular user in the Linux operating system.

QakBot Banking Trojan Returned With New Sneaky Tricks To Steal Your Money

A notorious banking trojan aimed at stealing bank account credentials and other financial information has now come back with new tricks up its sleeve to target government, military, and manufacturing sectors in the US and Europe, according to new research. In an analysis released by Check Point Research today, the latest wave of Qbot activity appears to have dovetailed with the return of

via The Hacker News

Vulnerable-AD - Create A Vulnerable Active Directory That'S Allowing You To Test Most Of Active Directory Attacks In Local Lab

Create a vulnerable active directory that's allowing you to test most of active directory attacks in local lab.

Main Features

Randomize Attacks
Full Coverage of the mentioned attacks
you need run the script in DC with Active Directory installed
Some of attacks require client workstation

Supported Attacks

Abusing ACLs/ACEs
Kerberoasting
AS-REP Roasting
Abuse DnsAdmins
Password in AD User comment
Password Spraying
DCSync
Silver Ticket
Golden Ticket
Pass-the-Hash
Pass-the-Ticket
SMB Signing Disabled

Example

# if you didn't install Active Directory yet , you can try 
Install-ADDSForest -CreateDnsDelegation:$false -DatabasePath "C:\\Windows\\NTDS" -DomainMode "7" -DomainName "cs.org" -DomainNetbiosName "cs" -ForestMode "7" -InstallDns:$true -LogPath "C:\\Windows\\NTDS" -NoRebootOnCompletion:$false -SysvolPath "C:\\Windows\\SYSVOL" -Force:$true
# if you already installed Active Directory, just run the script !
IEX((new-object net.webclient).downloadstring("https://raw.githubusercontent.com/wazehell/vulnerable-AD/master/vulnad.ps1"));
Invoke-VulnAD -UsersLimit 100 -DomainName "cs.org"

TODO

Add More realistic scenarios
Click close issue button on github

Download vulnerable-AD

via KitPloitRelated news

viernes, 28 de agosto de 2020

Steghide - A Beginners Tutorial

All of us want our sensitive information to be hidden from people and for that we perform different kinds of things like hide those files or lock them using different softwares. But even though we do that, those files attractive people to itself as an object of security. Today I'm going to give you a slight introduction to what is called as Steganography. Its a practice of hiding an informational file within another file like you might have seen in movies an image has a secret message encoded in it. You can read more about Steganography from Wikipedia.

In this tutorial I'm going to use a tool called steghide, which is a simple to use Steganography tool and I'm running it on my Arch Linux. What I'm going to do is simply encode an image with a text file which contains some kind of information which I don't want other people to see. And at the end I'll show you how to decode that information back. So lets get started:

Requirements:
1. steghide
2. a text file
3. an image file

After you have installed steghide, fire up the terminal and type steghide

It will give you list of options that are available.

Now say I have a file with the name of myblogpassword.txt which contains the login password of my blog and I want to encode that file into an Image file with the name of arch.jpg so that I can hide my sensitive information from the preying eyes of my friends. In order to do that I'll type the following command in my terminal:

steghide embed -ef myblogpassword.txt -cf arch.jpg

here steghide is the name of the program
embed flag is used to specify to steghide that we want to embed one file into another file
-ef option is used to specify to steghide the name (and location, in case if its in some other directory) of the file that we want to embed inside of the another file, in our case its myblogpassword.txt
-cf option is used to specify the name (and location, in case if its in some other directory) of the file in which we want to embed our file, in our case its an image file named arch.jpg

After typing the above command and hitting enter it will prompt for a password. We can specify a password here in order to password protect our file so that when anyone tries to extract our embedded file, they'll have to supply a password in order to extract it. If you don't want to password protect it you can just simply hit enter.

Now myblogpassword.txt file is embedded inside of the image file arch.jpg. You'll see no changes in the image file except for its size. Now we can delete the plain password text file myblogpassword.txt.

In order to extract the embedded file from the cover file, I'll type following command in the terminal:

steghide extract -sf arch.jpg -xf myblogpass.txt

here steghide is again name of the program
extract flag specifies that we want to extract an embedded file from a stego file
-sf option specifies the name of the stego file or in other words the file in which we embedded another file, in our case here its the arch.jpg file
-xf option specifies the name of the file to which we want to write our embedded file, here it is myblogpass.txt
(remember you must specify the name of file with its location if its somewhere else than the current directory)

After typing the above command and hitting enter, it will prompt for a password. Supply the password if any or otherwise just simply hit enter. It will extract the embedded file to the file named myblogpass.txt. Voila! you got your file back but yes the image file still contains the embedded file.

That's it, very easy isn't it?

It was a pretty basic introduction you can look for other things like encrypting the file to be embedded before you embed it into another file and so on... enjoy :)

El Rincón de Psicopedagogía

sábado, 29 de agosto de 2020

Top Users Command In Linux Operating System With Descriptive Definitions

id

last

who

groupadd

useradd

userdel

adduser

usermod

Read more

QakBot Banking Trojan Returned With New Sneaky Tricks To Steal Your Money

Related news

Vulnerable-AD - Create A Vulnerable Active Directory That'S Allowing You To Test Most Of Active Directory Attacks In Local Lab

viernes, 28 de agosto de 2020

Steghide - A Beginners Tutorial

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