Trojan:Win32/Dembr.A is a trojan that deletes the Master Boot Record (MBR), rending your computer unusable.

This trojan contains code to ensure that it only runs after 14:00, on March 20, any given year.

Additional remediation steps for Trojan:Win32/Dembr.A

Trojan:Win32/Dembr.A may make lasting changes to your computer that will NOT be restored by detecting and removing this threat. In such cases, you will need to reinstall Windows, and restore your computer from backup.

Windows Defender detects and removes this threat.

This ransomware encrypts the files on your PC and directs you to a webpage with instructions on how to decrypt them. 

It changes the extension of the encrypted file to .chipdale.

See our Ransomware page for more information about ransomware.

Find out ways that malware can get on your PC.  

Windows Defender detects and removes this threat.

This ransomware encrypts the files on your PC and directs you to a webpage with instructions on how to decrypt them.

It changes the extension of the encrypted file to .chipdale.

See our Ransomware page for more information about ransomware.

Find out ways that malware can get on your PC.  

Windows Defender detects and removes this threat.

This ransomware can encrypt the files on your PC so that you can't access them. This threat can be downloaded by other malware and is installed as coinvault.exe.

Our ransomware page has more information on this type of threat.

This application was stopped from running on your network because it has a poor reputation. This application can affect the quality of your computing experience. We have seen this leading to the following potentially unwanted behaviors on PCs:

• Adds files that run at startup
• Modifies file associations
• Injects into other processes on your system
• Injects into browsers
• Changes browser settings
• Changes browser shortcuts
• Installs browser extensions
• Adds a local proxy

These applications are most commonly software bundlers or installers for applications such as toolbars, adware, or system optimizers. We have observed this application installing software that you might not have intended on your PC.

If you were trying to install an application, you might have downloaded it from a source other than the official product's website.

We usually see this application installed on PCs in the following countries. This list is sorted according to prevalence:

• United States
• United Kingdom
• Korea
• Russia
• France

This detection is part of our extended Potentially Unwanted Application protection feature.

Trojan:Win32/Goweh.D is a Trojan that alters several settings in Internet Explorer. It changes the home page and redirects search queries and traffic to other Web pages. Win32/Goweh.D is usually installed on a computer by another Trojan dropper or downloader.

Trojan:Win32/Goweh.E is a Trojan that alters several settings in Internet Explorer. It changes the home page and redirects search queries and traffic to other Web pages. Win32/Goweh.E is normally installed on a computer by another Trojan dropper or downloader.

TrojanSpy:Win32.Goldun.AF is a Trojan that monitors Internet use and attempts to capture user names, passwords and financial information related to certain E-Gold Web site.

TrojanDownloader:Win32/Mitglieder.DD downloads malicious executable files from various URLs and then runs those files on the host computer. TrojanDownloader:Win32/Mitglieder.DD injects a dll into the explorer.exe process, which could allow the trojan to bypass local software-based firewall policies.

TrojanSpy:Win32.Goldun.BF is a Trojan that monitors Internet use and attempts to capture user names, passwords and financial information related to certain E-Gold Web site.

Windows Defender Antivirus detects and removes this threat.

 

Trojan:Win32/Goweh is a Trojan that alters several settings in Internet Explorer, changing the default home page and redirecting search queries and traffic to other Web pages.  

TrojanDownloader:Win32/Mitglieder.DD downloads malicious executable files from various URLs and then runs those files on the host computer. TrojanDownloader:Win32/Mitglieder.DD injects a dll into the explorer.exe process, which could allow the trojan to bypass local software-based firewall policies. This dll may be detected by Microsoft as TrojanDownloader:Win32/Mitglieder.DD.dll.

TrojanDownloader:Win32/Perka.A downloads a file named win.exe from a specified remote website and runs the file. Before opening the Internet connection to download the file, TrojanDownloader:Win32/Perka.A searches for and tries to kill processes related to Kaspersky, McAfee, and Eset active protection. Copies of TrojanDownloader:Win32/Perka.A have been known to be seeded in e-mail messages, but could also be encountered through Internet downloads.

Worm:Win32/Nuwar.IR registers itself as a Licensed Service Provider (LSP) on the compromised system. The worm receives messages from a remote Web site which it then appends to outgoing Web-based communications. The message includes a link that points to a copy of the worm file. These messages may be appended to outgoing instant messaging chats, Web-based e-mail, as well as blog comments and forum posts.

Trojan:Win32/Agent!246A is an Internet Explorer Browser Helper Object (BHO) implemented as a DLL plug-in that allows attackers to customize and control Internet Explorer.

TrojanDownloader:Win32/Small is family of Trojans that download unwanted software from a remote Web site. The content could include anything from additional downloader Trojans to imitation security programs.

TrojanDropper:Win32/Rootkitdrv.AG is a Trojan downloader that can download and execute Trojans or unwanted software located on one or more remote Web sites. TrojanDropper:Win32/Rootkitdrv.AG may be seeded in a German language e-mail, with a subject line containing "PayPal E-TAN Software".

TrojanDownloader:Win32/Searchclickads includes a Web browser toolbar that delivers advertisements and a self-updating program that may download unwanted software.

TrojanDownloader:Win32/Zlob.gen!P is generic detection for a component of Trojan:Win32/Zlob. This Trojan family displays advertisements and receives updates from a remote Web site. In some cases, Trojan:Win32/Zlob displays false warnings of malware infections, designed to encourage users to download rogue security applications or additional malicious files.