CrescentCore, OSX/CrescentCore: what it is and how to remove it

From our report of Aug 2021 · not reviewed since

CrescentCore is the malware that can significantly damage the machine and evade detection

CrescentCore, also known as OSX/CrescentCore is a Trojan horse designed to infect Mac computers by avoiding antivirus detection.

This dangerous threat is capable of secretly hiding inside a .dmg disk image and pretends to be a fake update of the Adobe Flash Player tool. Nevertheless, this type of malware aims to inject other programs into the system if the infected OS is not activated on a virtual machine and if no third-party security tools are enabled.

The infection process of any Mac malware, similar to OSX/Shlayer, begins when the victim clicks on the disk image icon and enters the fake Flash Player application. However, the threat takes some certain precautionary measures and identifies if it is not a virtual machine that it is running on. If not, malicious activities successfully continue.

Such a precaution step is taken by CrescentCore to ensure that the cybercriminals do not damage their own systems during the infective period.

Nevertheless, the Trojan virus needs to ensure that no antivirus protection is running on the infected system and if the malware finds out that it is working on a virtual machine or there is anti-malware on the system, it immediately stops the infections process and deletes itself from the computer/laptop.

If you are a Mac user who has always been concerned about automatic system protection, we can congratulate you as OSX.CrescentCore should not appear on your computer. However, if your machine lacks the required security, the risk of getting infected with this Trojan horse might not be that small as you expect it to be.

If CrescentCore finds all conditions satisfying, it continues malicious actions by installing another component known as LaunchAgent. Talking about what it does after such installation, cybersecurity researchers do not have one true answer. However, the Trojan horse might relate in the injection of suspicious security tools such as Advanced Mac Cleaner, Mac Tonic, Mac Mechanic, Auto Mac Speedup, and similar.

Besides, security experts think that the new malware strain might be capable of injecting a malicious "helper object" (e.g. extension) into the Safari web browser application. This type of activity can lead anywhere. CrescentCore and LaunchAgent might start spying on your personal information or credentials for misusing them in the future.

If you have discovered this notorious malware on your Mac computer system, you should be careful with it and opt for malware removal right away. Note that trojan infections might relate to high CPU work, injection of other malicious programs, corruption of software or files, collection of personal data/credentials.

You should not try to remove CrescentCore by yourself as manual activities might relate to more damage than you think it could. Our suggestion would be to scan the entire system with a strong antivirus program such as , to identify all malware strains. Once you find their directories, clean these locations with reputable software entirely.

From our report of Aug 2021 · not reviewed since

More from our earlier report on CrescentCore, OSX/CrescentCore

• Use anti-malware tools to perform a full system scan and find malware
• In addition to virus removal, you should take care of the virus damage to, so run to fix possible

From our report of Aug 2021 · not reviewed since

Security experts from NoVirus.uk claim that dangerous infections often choose unprotected sources to be placed in.

These pages are easy to enter and due to the lack of protection they provide, potential victims are also very easy to catch here. If you like entering third-party video-watching, gambling, adult-themed, or piracy websites, you have a big risk of ending with notorious malware on your computer system.

The second way of distributing notorious viruses is by using fake Adobe Flash Player updates. Messages which claim that updates are needed for the Player app often appear to be very legitimate-looking and aim to trick a big number of users.

However, we want to warn users not to fall for such tricks, especially, if they are using Google Chrome. This browser updates its in-built Player automatically and no manual updates are ever needed.

Malware might also be pushed through email spam campaigns and come injected into normally-looking attachments which are the main carriers of the malicious payload. Be aware of messages that include numerous grammar mistakes, come from an unrecognizable sender. All attachments (even legitimate-looking ones) need to be put under a scan of anti-malware software for full identification.

From our report of Aug 2021 · not reviewed since

Elimination of the CrescentCore virus

CrescentCore removal process is not a thing you should postpone or not pay attention to.

Most important, DO NOT try to get rid of this malware by yourself if you lack skills in this field. However, if you believe that you are a well-experienced user and have found some signs of infection on your computer, what you can do by yourself is disabling malicious processes if some are found in your Mac machine:

Once you have done this, you can also search for malicious strings related to the malware in your Mac login items. If you have found some, you can delete them with the help of these guiding steps:

However, our suggestion would still be to use reputable anti-malware programs such as , , for detecting all components related to this Trojan virus. Also, you can keep the antivirus protection on your computer/laptop for future safety purposes.

• Go to Launchpad and type in "Activity Monitor".
• Open the application and go to the Processes tab.
• Find all suspicious processes and press the X button to quit them.
• Locate the Apple menu and continue with System Preferences.
• Press on the Users & Groups sector.
• Ensure that your username is picked in the left side.
• After that, find all suspicious login components in the Login Items tab.
• Use the minus (-) sign to eliminate them.