Tag Archive for: Detect

EwDoor Malware Infects AT&T Users: How to Detect Data-Stealing Virus, Remove from Your Phone

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EWDoor malware infected the networking equipment of AT&T, which protects and manages communications of the mobile carrier.

The said AT&T malware affected more than 5,700 subscibers.

EWDoor Malware Affects AT&T Subscribers

Chinese cybersecurity company, Qihoo 360, found out that thousands of networking equipment belonging to AT&T subscribers in the United States have been compromised with newly acquired malware, per Ars Technica.

Gizmodo reported that the AT&T malware acts as a backdoor, allowing an attacker to get into networks, steal data and engage in other activities.

Moreover, the said attacked device is named EdgeMarc Enterprise Session Border Controller. This tool is used by small and medium companies to protect and manage phone calls, video conferencing and other real-time communications.

In addition to this, session border controllers, the link connecting businesses and their Internet service providers, have access to a wide range of bandwidth and may obtain sensitive personal information, making it perfect for distributed denial of service (DDoS) attacks and data gathering.

Since the AT&T malware acts as a backdoor, it was named EWDoor by Qihoo 360, which is a word play of the “backdoor,” referring to the fact that it affects Edgewater devices.

In addition to this, EWDoor malware can update on its own, do port scanning, organize files, DDoS attack, reverse shell, and unprecedented command execution.

For those who do not know what DDoS is, Kaspersky stated that it is a method of attack that takes advantage of internet resource capacity limitations.

The DDoS attack will make several demands towards the targeted online resource. Aside from this, it also aims to surpass the website’s capabilities, accommodate numerous request and prevent it from working properly.

Read Also: Apple Hack for Students, Teachers: How to Get $400 Discount on Your Mac, iPad Purchase

On the other hand, Qihoo 360 researchers identified the EWDoor malware after infiltrating a previously undisclosed botnet, revealing that it had affected at least 5,700 AT&T subscribers in the United States.

They also claimed to have discovered more than 100,000 devices using the same TLS certificate as…

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How to Scan Windows PC to Detect Malware: Step-by-Step Guide

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You are your Windows If your PC is infected with malware or intends to perform regular scans as part of the digital cleanup process, here is some good news. Microsoft Windows has built-in security tools to assist in this process. It’s available under the name Windows Security, so you don’t have to buy paid third-party software.

Previously, Windows Security was available under the name Windows Defender Security Center, but today’s apps are pretty much the same as previous apps.[スタート]Of the menu[WindowsDefender]If you look up[Windowsセキュリティ]The options are displayed. Even today, Microsoft still calls the actual antivirus scan Windows Defender.

Microsoft’s built-in anti-malware software was considered of no value to technical professionals, but today it can compete with well-known names such as: Avast When Kaspersky.. Windows security can block 99.7% of threats.

High tech giant Microsoft It also promotes security in Windows 11 and can confuse individuals using older generation computers that do not have a specific hardware configuration.

However, when it comes to old-fashioned software security, Windows 11 It’s relatively easy.

To access this, it’s at the bottom left of the screen[スタート]Simply enter “Windows Security” in the menu search.[設定],[プライバシーとセキュリティ],[Windowsセキュリティ]You can also access by moving in the order of. This gives you a quick overview of the status of your system.

next,[Windowsセキュリティを開く]You can click the option to get full access to the application.

Here’s how to perform a malware scan in Windows 11

Windows built-in security runs in the background by default and strives to quickly block malicious data that invades your PC. You can also perform a manual scan if you want to perform regular spot checks.

step 1: To perform a manual scan[Windowsセキュリティ],[ウイルスと脅威の保護]Move in the order of.

Step 2: Click the Quick Scan option. If you want to perform a more comprehensive scan, it will take some time, but check all the files and operating programs. or,[スキャンオプション]Click the button[フルスキャン]You can also select.

Step 3:…

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Researchers demonstrate how malware can detect its environment using the trap bit

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Recently, security researchers demonstrated how the use of the trap bit in x86 processors could inform running malware if it is running in a virtual environment or not. What is the purpose of the trap bit, how can it benefit malware, and what does this mean for future CPU hardware and virtualisation?

In the x86 CPU architecture, the trap bit is a special flag in the EFLAG register that raises an interrupt after completing a single instruction once the flag is set. For example, a piece of machine code would first set the trap flag, execute an instruction, and this would then trigger the CPU to execute a special interrupt that runs a subroutine.

While there is no specific purpose for the trap flag, it is convenient for debugging as it allows for code to be executed step-by-step. Furthermore, the interrupt allows for viewing the CPU contents, including registers, program counter, and stack pointer.

Recently, researchers from Palo Alto Networks demonstrated how the trap bit in x86 processors could be abused by malware to determine if the malware is being executed on a real computer or in a virtual machine. The cause of the exploit lies in how virtual machines emulate the behaviour of the trap flag. If a piece of malware sets the trap flag after executing certain special instructions such as RDTSC and CPUID, the CPU should return to the malware code with the trap bit cleared. While this is the case in real hardware, virtual machines may not catch this and return to the code with the trap bit still set.

The calling of a special instruction sees the CPU handle the interrupt, but if the trap bit is enabled on a basic instruction such as NOP, the malware can use its interrupt handler to detect this. Thus, if the malware interrupt handler is fired with the trap bit set, it knows it is running on a virtual machine. If no exception is thrown, then the malware knows that it is running on a real system.

One practical use of virtualisation is to test unknown code and applications to see how they behave. For example, an individual could find a USB flash drive lying around with no idea what is inside. While one could risk…

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Incident Response Process – CompTIA Security+ SY0-501 – 5.4

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