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Microsoft Security Intelligence
500 entries found. Displaying page 7 of 25.
Updated on Jan 10, 2018

Microsoft Defender Antivirus detects and removes this threat.

This threat stops you from loading Windows and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, do not pay it. The message is a fraud.

It tries to scare you into paying a fine or texting a premium-charge phone number to unlock your PC.

You can read more on our ransomware page.

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Alert level: severe
Updated on Jan 10, 2018

Microsoft Defender Antivirus detects and removes this threat.

This threat stops you from loading Windows and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, do not pay it. The message is a fraud.

It tries to scare you into paying a fine to unlock your PC.

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

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Alert level: severe
Updated on Jan 10, 2018

Microsoft Defender Antivirus detects and removes this threat.

The threat is a HTML page used by the Ransom:Win32/Urausy.A ransomware trojan.

This threat stops you from loading Windows and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, do not pay it. The message is a fraud.

It tries to scare you into paying a fine to unlock your PC.

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

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Alert level: severe
Updated on Jan 10, 2018

Windows Defender AV detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

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

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Alert level: severe
Updated on Jan 10, 2018
Microsoft Defender Antivirus detects and removes this threat. 

The threat locks your screen and prevents you from using your desktop. It shows you a message saying that if you want to regain access to your desktop, you have to pay a fine in the form of an SMS sent to a premium number.

This type of threat is known as ransomware.

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

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Alert level: severe
Updated on Jan 10, 2018

Microsoft Defender Antivirus detects and removes this threat. 

This threat locks your PC and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, don't pay it. The message is a fraud.

It pretends to be from your local police force and tries to scare you into paying a fine to unlock your PC.

It's likely your PC has also been infected with other malware from the Win32/Reveton family.

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

The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.

Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.

Alert level: severe
Updated on Apr 17, 2016

Windows Defender detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

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

Alert level: severe
Updated on Aug 02, 2023
Alert level: severe
Updated on Dec 09, 2014

Windows Defender detects and removes this threat.

This ransomware encrypts the files on your PC so you can't use them. It shows you a message that says you must pay for decryption software to get access to your files again.

It can be installed on your PC by other malware, or you might have downloaded it from a torrent or file sharing site, thinking it was something else.

See our ransomware page for more information about this type of threat, including ways to prevent it and how to recover your files.

Alert level: severe
Updated on Jan 12, 2015

Windows Defender detects and removes this threat.

This threat can encrypt your files and ask you for a payment to unlock them.

Find out ways that malware can get on your PC.  

Alert level: severe
Updated on Sep 27, 2012

Trojan:Win32/Weelsof.C is a trojan that connects to certain servers to download arbitrary files.

Alert level: severe
Updated on Jul 17, 2017

Microsoft Defender Antivirus detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

This ransomware has worm-like capabilities that allows it spread across infected networks. It's spreading capabilities include:

  • Lateral movement using credential theft and impersonation
  • Lateral movement using the EternalBlue and EternalRomance exploits

For more information on this threat, which caused an outbreak on Jun 27, 2017, read these blog posts on the Windows Security blog:

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

Alert level: severe
Updated on Dec 19, 2023
Alert level: severe
Updated on Jun 20, 2024
Alert level: severe
Updated on Jun 20, 2024
Alert level: severe
Updated on Jun 20, 2024
Alert level: severe
Updated on Apr 14, 2015

Windows Defender detects and removes this threat.

This threat locks your files and stops you from using them. It then shows you a message that tells you to pay money to get access to your files again.

It can be installed on your PC by TrojanDownloader:Win32/DalexisSpammer:Win32/Tedroo, by spam email or by exploit kits. 

Alert level: severe
Updated on Jan 02, 2024
Alert level: severe
Updated on Mar 30, 2015

Windows Defender detects and removes this threat.

The threat encrypts your files and asks you to contact the email provided in order to receive instructions on how to decrypt your files.

This threat can be bundled with other malware. It can also be downloaded when you click on a link in a spam email.

Find out ways that malware can get on your PC.  

You can read more on our ransomware page.

Alert level: severe
Updated on Jul 02, 2021
Alert level: severe