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Microsoft on Wednesday shed light on a previously undocumented Mac trojan that it said has undergone several iterations since its first appearance in September 2020, effectively granting it an "increasing progression of sophisticated capabilities."

The company's Microsoft 365 Defender Threat Intelligence Team dubbed the new malware family "UpdateAgent," charting its evolution from a barebones information stealer to a second-stage payload distributor as part of multiple attack waves observed in 2021.

"The latest campaign saw the malware installing the evasive and persistent Adload adware, but UpdateAgent's ability to gain access to a device can theoretically be further leveraged to fetch other, potentially more dangerous payloads," the researchers said.

The actively in-development malware is said to be propagated via drive-by downloads or advertisement pop-ups that masquerade as legitimate software like video applications and support agents, even as the authors have made steady improvements that have transformed UpdateAgent into a progressively persistent piece of malware.

Chief among the advancements include the capability to abuse existing user permissions to surreptitiously perform malicious activities and circumvent macOS Gatekeeper controls, a security feature that ensures only trusted applications from identified developers can be installed on a system.

In addition, UpdateAgent has been found to take advantage of public cloud infrastructure, namely Amazon S3 and CloudFront services, to host its second-stage payloads, including adware, in the form of .DMG or .ZIP files.

Once installed, the Adload malware makes use of ad injection software and man-in-the-middle (MitM) techniques to intercept and reroute users' internet traffic through the attacker's servers to insert rogue ads into web pages and search engine results to increase the chances of multiple infections on the devices.

"UpdateAgent is uniquely characterized by its gradual upgrading of persistence techniques, a key feature that indicates this trojan will likely continue to use more sophisticated techniques in future campaigns," the researchers cautioned.

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10:45 AM

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.

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DotNet First Side

Thursday, June 1, 2023

New Variant Of UpdateAgent Malware Infects Mac Computers With Adware

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Top Users Command In Linux Operating System With Descriptive Definitions

id

last

who

groupadd

useradd

userdel

adduser

usermod

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