Is it a Virus?
✔ YES - Vidar Stealer is malware
Typically located in C:\Program Files\Vidar or C:\ProgramData\Vidar. Unusual paths or lack of a legitimate publisher indicate infection.
Warning
Multiple modules performing data exfiltration
Vidar often runs a loader, credential grabber, and network exfiltration components simultaneously.
Can I Disable?
✖ NO - Do not attempt to disable in place
Disabling may leave the malware active. Remove Vidar with a full malware clean-up.
What is vidar.exe?
vidar.exe is the main executable for the Vidar Stealer malware family. It stealthily operates on compromised Windows machines to collect credentials, cookies, browser data, and crypto-wallet information, then exfiltrates the harvested data to attacker-controlled servers.
Vidar uses a modular loader and process injection to harvest data from browsers, email clients, and crypto wallets. It employs obfuscation and encryption to evade detection and sends data via HTTP(S) to remote controllers.
Quick Fact: Vidar emerged as a versatile information stealer and continues to evolve with modular components.
Types of Vidar Processes
- Loader/Dropper: Initial module that installs the rest of Vidar components
- Credential Grabber: Harvests stored passwords, autofill data, and tokens
- Browser/Data Extractor: Targets browsers and wallet applications for data exfiltration
- Network/Exfiltration: Handles data transmission to command servers
- Persistence/Startup: Maintains a foothold on the infected host
- Anti-detection/Obfuscation: Employs evasion techniques to hinder analysis
Is vidar.exe Safe?
No, vidar.exe is not safe - Vidar Stealer is a known malware family that steals credentials and data.
Is vidar.exe a Virus or Malware?
The real vidar.exe is malware. It is not a legitimate Windows process and is designed to exfiltrate data.
How to Tell if vidar.exe is Legitimate or Malware
- File Location:: Check for
C:\Program Files\Vidar\vidar.exe or C:\ProgramData\Vidar\vidar.exe. Nonstandard locations are suspicious.
- Digital Signature:: Right-click the file in Explorer → Properties → Digital Signatures. Absence of a valid signature or presence of a suspicious signer indicates malware.
- Process Behavior:: Monitor Task Manager for vidar.exe runtime. Malware often runs without user interaction and injects into other processes.
- Network Activity:: Inspect firewall or network logs for unknown outbound connections to unfamiliar hosts or domains.
Red Flags: If vidar.exe is running from a Temp, AppData, or ProgramData folder without installation, has no valid signature, or transmits data to unknown servers, you likely have a infection. Run a full antivirus scan immediately.
Why Is vidar.exe Running on My PC?
Vidar runs to steal credentials and monitor activity or to maintain persistence after initial infection. It may also execute to exfiltrate data or to receive further updates from its C2.
Reasons it's running:
- Active Data Theft: Vidar is actively collecting credentials, cookies, and wallet data while the infection persists
- Background Exfiltration: The malware exfiltrates stolen data to a remote server, often using encrypted channels
- Persistence Mechanisms: Vidar creates startup tasks or Registry Run entries to survive reboots
- Modular Updates: New modules are loaded to expand capabilities or evade detection
- Evasion Techniques: Obfuscation, code packing, and process injection hinder detection by AV and analysts
Can I Disable or Remove vidar.exe?
Yes, you should remove vidar.exe. Disable is not enough because the malware may restart or re-infect the system.
How to Stop vidar.exe
- Run Full Antivirus Scan: Update and run a complete system scan with your security suite and Windows Defender
- Isolate Infected Host: Disconnect from network to prevent data exfiltration while cleaning
- Use Safe Mode: Boot in Safe Mode with Networking and run malware removal tools
- Remove Vidar Components: Uninstall any Vidar-related programs and delete files in Program Files and AppData
- Check Startup Entries: Open Task Manager → Startup and disable any Vidar-related entries
How to Uninstall Vidar
- ✔ Perform a full system scan with updated antivirus and remove all detected Vidar components
- ✔ Manually delete Vidar folders: C:\Program Files\Vidar and C:\ProgramData\Vidar
- ✔ Check and clean Startup entries in Task Manager
- ✔ Reset browser data and wallets after clean-up to avoid leftover credentials
Common Problems: High CPU or Memory Usage
If vidar.exe is consuming unusual resources or exhibiting unexpected behavior, consider these scenarios and fixes.
Common Causes & Solutions
- Continuous data exfiltration: Ensure network monitoring is enabled and block unknown outbound destinations; scan for additional malware.
- Malicious browser injections: Reset browser profiles and remove Vidar-related extensions; consider fresh profiles
- Multiple Vidar modules active: End suspicious processes with Task Manager and verify module list; eliminate redundant modules
- Outdated security definitions: Update antivirus definitions and run an offline scan if needed
- After infection remnants: Run dedicated cleanup tools from reputable vendors and reimage if necessary
- System resource constraints: Limit background tasks and disable nonessential apps; ensure system has adequate RAM
Quick Fixes:
1. Quick Fixes:
2. 1. Run a full system scan with antivirus (include malware removal tools)
3. Disconnect from network to stop data exfiltration
4. Remove Vidar components from Program Files and AppData
5. Reset browsers and wallets; clear caches and saved credentials
6. Update Windows and security software to the latest versions
Frequently Asked Questions
What is vidar.exe?
Vidar.exe is the main component of the Vidar Stealer malware family, designed to steal credentials, cookies, and wallet data from infected Windows machines.
Is vidar.exe a virus?
Yes, vidar.exe is malware, not a legitimate system file. It should be removed with reputable antivirus tools and manual cleanup if needed.
How do I know if Vidar is on my PC?
Look for vidar.exe in C:\Program Files\Vidar or C:\ProgramData\Vidar, high outbound network activity, unusual Startup entries, or browser wallet data theft indicators.
How do I remove Vidar?
Run a full system scan with updated antivirus, then delete Vidar folders in Program Files and AppData, disable startup entries, and reset affected browsers and wallets.
Can Vidar steal my passwords from browsers?
Yes, Vidar is designed to harvest credentials stored in browser password managers, cookies, and autofill data. Remove through malware cleanup and change passwords after cleanup.
Will antivirus detect Vidar easily?
Modern AV tools can detect Vidar, but it uses obfuscation and modules to evade detection. Ensure signatures are up to date and run offline scans if needed.
Does Vidar target Windows only?
Vidar primarily targets Windows, though some components may attempt to operate on other platforms via cross-compat modules. Focus on Windows cleanup first.