Microsoft released new definition update Version 1.271.555.0 for Windows Defender and Microsoft Security Essentials on 05 July 2018. Windows receives lots of threats and attacks through harmful and damaging programs from third party websites and software. The built-in security tools try to detect them and remove from your computer. Microsoft updates the definitions on regular basis to empower Windows defender to fight with the threats.
Definition update Version 1.271.555.0 includes 2 new definitions to remove Exploit:Ruby/Leivion.B and Trojan:Win32/Werpoapt!rfn. There are lots of updates for other malware.
See the detail ahead –
Microsoft Latest Definition Update Version 1.271.555.0
First of all, let’s check the change log for new definitions
Exploit:Ruby/Leivion.B – This exploit utilizes a vulnerability in software to spread infection. The threat was typically used to install other malware or dangerous program without your knowledge. Windows Defender Antivirus traces out and eliminates Exploit:Ruby/Leivion.B.
Trojan:Win32/Werpoapt!rfn – This threat can execute multiple actions of a malicious hacker’s preferences on your PC.
You must run Windows Defender full scan and Security Scanner as well to identify and remove the threats. Now have a look at the updated definitions –
Microsoft has updated several definitions to fight notorious malware. Some of these are as follow –
BrowserModifier:Win32/Diplugem – This is an old program that has the capability of displaying additional ads when browsing the web. The threat arrives from 3rd party websites and adds up browser extensions without taking permission from you.
HackTool:PowerShell/PsAttack!rfn – Another threat for which Microsoft updated definition is this one. It enters through the software that you commonly use to crack a premium software without having a genuine license.
SoftwareBundler:MSIL/Wizrem – This is a harmful program that comes through a 3rd party software when you are installing. The malware runs in the background as in most of the samples GUI is missing. SoftwareBundler:MSIL brings unnecessary apps on your system.
Backdoor:Linux/Mirai!rfn – This is yet another malware controls your system without your permission. Hackers can get access to a PC using this program and create a mess.
DDoS:Linux/Lightaidra!rfn – This is a damaging program that is detected by Windows Defender. The threat manipulates your PC for distributed denial-of-service attacks.
Worm:Win32/Fadok.A – These are severely infectious viruses that can spread to several PCs. The program gets about by copying themselves to USB/flash/pen drives, network folders, or go through email.
Follow the instructions to receive on your system – How to Check Protection Updates for Threat Definitions in Windows 10.
Source – Antimalware release note