Posted: August 30, 2016
Threat Metric
Threat Level: 8/10
Infected PCs 16,369

QuasarRAT Description

QuasarRAT is a threatening, remote access Trojan whose presence on a computer is a sign that someone is trying to get access to the data stored and the actions performed on the computer. The peculiar thing is that Remote Access Trojans (RATs) are often quite expensive, especially when they contain the list of features that QuasarRAT's author has implemented in their creation. However, the case with QuasarRAT is that this product is entirely free, and its source code can be obtained, modified, and compiled to fit the needs of ill-minded users. Since the product comes in the form of uncompiled files, it is likely that only knowledgeable cyber crooks will be able to fully utilize the features of this threat, therefore reducing the likelihood that complete beginners will be able to infect innocent users with their versions of QuasarRAT.

According to the release page of QuasarRAT, this is supposed to be a Remote Administration Tool, but its description shows that it is likely to be used for harmful purposes. QuasarRAT is able to access and control the victim's desktop, webcam, and microphone, as well to log keystrokes to store conversations, usernames, passwords and other data. Just like the majority of RATs, it provides attackers with remote desktop access, as well as the potential to download/upload and execute files on the victim's computer. The entire list of features is rather long, but it shows that QuasarRAT is a powerful tool that you must be protected from if you want to avoid serious problems.

Since QuasarRAT might be used by anyone, it is impossible to determine the exact infection vectors that random cyber crooks might use. That's why the number one advice is to learn how to browse the Web safely and stay away from websites or content that are deemed unsafe. Remember to double check all downloaded websites with a reliable anti-virus tool to ensure that they will not cause any harm to your PC when you open them. Naturally, you also should install and activate a credible PC security utility that can keep you away from unsafe content that you might encounter during your Web browsing ventures.

Use SpyHunter to Detect and Remove PC Threats

If you are concerned that malware or PC threats similar to QuasarRAT may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.

Download SpyHunter's Malware Scanner

Note: SpyHunter's free version is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware tool to remove the malware threats. Learn more on SpyHunter. If you would like to uninstall SpyHunter for any reason, please follow these uninstall instructions. To learn more about our policies and practices, visit our EULA, Privacy Policy and Threat Assessment Criteria.

Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

c:\users\he\appdata\roaming\optigrillss\optigrillst.exe File name: optigrillst.exe
Size: 190.46 KB (190464 bytes)
MD5: 59122b93dabdb8d0736adcf7f57f71df
Detection count: 70
File type: Executable File
Mime Type: unknown/exe
Path: c:\users\he\appdata\roaming\optigrillss\
Group: Malware file
Last Updated: February 25, 2019
file.exe File name: file.exe
Size: 714.21 KB (714216 bytes)
MD5: 46d08a8be16768ee32fcbaa8083ea2f0
Detection count: 57
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: August 30, 2016

Registry Modifications

The following newly produced Registry Values are:

Directory%APPDATA%\optigrillss%APPDATA%\SubDir%APPDATA%\SubDirr%WINDIR%\system32\SubDir%WINDIR%\SysWOW64\SubDirRegexp file mask %APPDATA%\rocking.exe%APPDATA%\K-Mart Corp\K-Mart Corp.exe%APPDATA%\Microsoft\Windows\Update\Update.exe%APPDATA%\system\core.exe%WINDIR%\System32\Tasks\Quasar Client StartupRegistry keySOFTWARE\Microsoft\Tracing\sschost_RASAPI32SOFTWARE\Microsoft\Tracing\sschost_RASMANCSSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\Quasar Client StartupSOFTWARE\Wow6432Node\Microsoft\Tracing\sschost_RASAPI32SOFTWARE\Wow6432Node\Microsoft\Tracing\sschost_RASMANCS

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