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Also known as: VidarStealer, Artemis

Category: Malware

Type: Information stealer

Platform: Windows

Damage potential: Exposure of personal data, identity theft, financial fraud, payloads


Vidar is malicious software that extracts sensitive information from an infected system. This information can range from login credentials and credit card details to cryptocurrency wallets and browser history. The stolen data then can be used for identity theft, financial fraud, or sold on the dark web.

Possible symptoms

The most common symptoms of Vidar infection is slow system performance and unusual network activity. Other symptoms include:

  • Increased data usage for no apparent reason

  • Unexpected changes in browser settings

  • Unfamiliar browser extensions

  • Unauthorized access or suspicious activity on online accounts

Sources of the infection

Vidar typically infects devices through malicious links and downloads, such as:

  • Ads that trick you into downloading Vidar when you click on them

  • Phishing emails with malicious attachments or links

  • Software packages bundled with Vidar


  • Make sure that your operating system and all software, especially web browsers and plugins, are up-to-date.

  • Avoid opening attachments and links from unknown senders.

  • Use NordVPN’s Threat Protection to scan downloads for malware and block malicious ads and websites.

  • Download software only from reputable sources.

  • Use a reliable antivirus solution that can detect and remove threats like Vidar.

  • Regularly back up your data.


Follow these steps if you suspect that your device might be infected with Vidar:

  • Disconnect from the internet: This will prevent further data theft.

  • Boot into safe mode: Start your device in safe mode to limit malware operation.

  • Run a full system scan: Use your antivirus and anti-malware software to detect and remove the threat.

  • Change all passwords: Vidar is known for its information-stealing capabilities, which puts accounts at risk. Change your passwords to avoid further damage.

If you’re still unsure about complete removal, consider seeking professional help.

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