MIMICRAT Removal Guide: Remove Fake Verification Malware From Windows PC

A website interrupts you with a human-verification check. Then it asks you to open a Windows command window instead of simply completing the page.

MIMICRAT uses that handoff to move an attack outside the browser. If you followed the prompt, the next steps depend on whether Windows executed it.

Overview

MIMICRAT is a Windows remote-access trojan

MIMICRAT lets an intruder execute commands, manipulate files and processes, impersonate security tokens, and route traffic through an infected Windows computer.

The analyzed implant supported 22 commands. Responders use the device’s activity and security records to establish which functions were used.

A fake verification prompt starts the infection

The documented campaign used compromised websites to display a fake human-verification check. It directed visitors to paste a command into Run or PowerShell.

Executing that command started additional loading stages and delivered the implant in memory. A visible installation window was not required.

Choose the next step by what you did

• Only saw the prompt: close it without following the instructions.
• Copied the command but did not run it: replace the clipboard contents with a harmless word.
• Downloaded a file but left it unopened: do not run it; keep its source for the incident record.
• Pressed Enter in Run or PowerShell: disconnect the PC and begin the removal response.
• Work device: contact security before cleanup tools, restarts, or deleting evidence.

Use another trusted device for account protection after execution. Keep the page address, approximate time, and any antivirus report.

How to Remove MIMICRAT From Windows

Use these steps on a personal Windows computer after recording the incident details. Leave sensitive accounts closed while cleanup is underway.

For a work or school computer, contact its IT or security team before installing tools or restarting. Its investigation may need evidence from the running system.

If remote access is suspected, disconnect Wi-Fi or Ethernet and stop using this PC for sensitive accounts. Arrange trusted downloads and updates before proceeding with cleanup.

Start with Malwarebytes. HitmanPro and ESET are optional second opinions for unresolved findings or continuing symptoms. Run one scanner at a time.

• STEP 1: Use RKill only if malware blocks your scanner
• STEP 2: Scan and quarantine threats with Malwarebytes
• STEP 3: Optional: Check unresolved threats with HitmanPro
• STEP 4: Optional: Run a second-opinion scan with ESET

Step 1: Use RKill only if malware blocks your scanner

RKill attempts to stop known malware processes so your security software can run. It does not remove the infection.

Use it only on a personal Windows PC when malware is blocking your scanner. Otherwise, skip directly to Malwarebytes.

1. Download Rkill.

   Download RKill using the button below. On the download page, choose the iExplore.exe version.

   This is a renamed copy of RKill, provided for infections that block security tools by filename.

   RKillStops malware processes so other tools can run

   Download RKillOpens the BleepingComputer download page in a new tab.

2. Run RKill.

   Open your Downloads folder and double-click iExplore.exe. Allow the program time to finish checking for processes that interfere with cleanup.

   

   When the black window closes, a log opens. Keep the log, do not restart yet, and continue directly to Malwarebytes.

Step 2: Scan and quarantine threats with Malwarebytes

Malwarebytes for Windows can scan for malware and quarantine detected threats. Use the free Custom Scan below; a paid plan is not required for this cleanup.

1. Download Malwarebytes

   Click the button below to download Malwarebytes for Windows. Paid real-time protection is optional.

   Malwarebytes Free for WindowsScans and removes malware at no cost

   Download MalwarebytesMalwarebytes free scanner informationOfficial installer for Windows 11 and 10. Your download starts right away.Want real-time protection? See Malwarebytes Premium

2. Install Malwarebytes

   When the download finishes, open Downloads and double-click MBSetup. If Windows asks for permission, check that the prompt identifies Malwarebytes, then click Yes.

   

3. Follow the On-Screen Prompts to Install Malwarebytes

   The setup wizard will walk you through a few quick screens:

   Installer screens and optional offers vary. Skip unwanted Browser Guard, trial, or paid-plan offers. The free Custom Scan remains available; Threat Scan may require a paid plan.

   • Choose Personal for your own computer, then click Next. For a work-managed device, use your organization’s approved response instead.

     
     

   • Wait for installation to finish.

     
     

   • If the Welcome to Malwarebytes screen appears, click Get started and follow the remaining prompts.

     
     

   • On the final screen, click Open Malwarebytes to launch the program.

     
     

4. Choose the scan type and optional rootkit check

   On the Scanner tile, click the three dots, choose Advanced Scan, then Custom Scan.

   Expand the folder selector and select the C:\ system drive. Include any other drive where the suspicious files were stored.

   If Scan for rootkits is available, you can enable it. This setting is unavailable on Windows ARM devices; leave Windows security protections enabled.

   Review how potentially unwanted programs and modifications will be handled. Keep detection enabled rather than automatically ignoring these items.

5. Start the Scan

   Click Start Custom Scan. Allow Malwarebytes to update its detection information if prompted.

6. Wait for the Scan to Finish

   Wait for the Custom Scan to finish. The time required depends on the selected locations and the amount of data.

7. Quarantine the Detected Threats

   When the scan finishes, review the detections and keep the threats you want removed selected. Click Quarantine.

   If a detection is unclear, save the report and ask for help before excluding or restoring it.

   

   Wait while Malwarebytes quarantines the selected items. Do not restore a file merely because an unfamiliar name appears in the results.

   

8. Restart Your Computer

   If Malwarebytes asks for a restart, save your work and click Yes. After signing back in, reopen Malwarebytes and check the report for unresolved detections.

   

Step 3: Optional: Check unresolved threats with HitmanPro

HitmanPro is a second-opinion scanner for Windows. It examines suspicious files using cloud analysis, including SophosLabs. An internet connection is needed for that check.

Scanning is free. Removing detections requires an eligible one-time 30-day trial or a paid license.

A computer that already used its trial may not qualify again. You do not have to buy HitmanPro to follow the Malwarebytes cleanup above.

1. Download HitmanPro

   Click the button below to download HitmanPro if you want a second opinion on unresolved symptoms or detections.

   HitmanProSecond-opinion malware scanner from Sophos

   Download HitmanProFree scan. Removal requires an eligible 30-day trial or a paid license. Opens the official HitmanPro page in a new tab.

2. Install HitmanPro

   When the download finishes, open your Downloads folder and double-click the file: “hitmanpro.exe” on 32-bit Windows, or “hitmanpro_x64.exe” on 64-bit Windows.

   

   If a User Account Control pop-up asks whether HitmanPro can make changes to your device, click “Yes” to continue.

   

3. Follow the On-Screen Prompts

   On the HitmanPro start screen, click Next. Read and accept the terms if you agree, then continue.

   

   Choose whether to keep a copy for later use or run a one-time scan. Review optional startup and email preferences, then click Next.

   

4. Wait for the Scan to Finish

   Let HitmanPro finish scanning. Review its findings once the scan has completed.

   

5. Review the Results and Click “Next”

   Review the detected items and their proposed actions. Save the log if you need help with an unfamiliar detection, then click Next to proceed.

   

6. Click “Activate Free License”

   If this computer qualifies, click Activate free license and follow the activation prompts.

   If no trial is available, use an existing license or save the report for assistance. Do not assume a purchase is necessary to continue cleanup.

   

   After removal, review the summary and click Next. Choose Reboot if requested, or Close if no restart is needed.

   If detections return or the original symptoms persist, keep the reports and ask for help. A clean scan cannot rule out every threat.

Step 4: Optional: Run a second-opinion scan with ESET

ESET Online Scanner is a free second-opinion scanner for Windows. Use it if you need another check after cleanup, rather than running several scanners together.

1. Download ESET Online Scanner

   Click the button below to download ESET Online Scanner.

   ESET Online ScannerFree one-time malware scan from ESET

   Download ESET Online ScannerOpens the official download page in a new tab.

2. Run the Installer

   When the download finishes, open Downloads and double-click esetonlinescanner.exe. Approve the Windows permission prompt after checking that it identifies ESET.

   

3. Install ESET Online Scanner

   On the start screen, select your language from the drop-down menu and click Get started.

   

   Read the Terms of use. Click Accept if you agree, then Get started if that screen appears again.

   

   Choose your preferences for the Customer Experience Improvement Program and the Detection feedback system (either choice is fine), then click Continue.

   

4. Start a Full Scan

   Click Full Scan for a broader check than the quick-scan option.

   

   Select Enable for Detection of Potentially Unwanted Applications. Then click Start scan.

   

5. Wait for the Scan to Finish

   Allow the detection modules to download and update. The file scan begins afterward.

   Leave the scan running until it finishes. A full scan can take an hour or longer, depending on your computer and the data being checked.

   

6. Review the Results

   When the scan finishes, open View detailed results and check the action recorded for each detection.

   ESET attempts to clean and quarantine detected threats. If an item remains unresolved, keep its details for assistance.

   Click Save scan log to keep the results. Then click Continue.

   

   Restart if ESET requests it. Afterward, check whether detections or the original symptoms return.

   If problems continue, keep the scan reports and ask for help in the MalwareTips removal forum. Do not repeatedly restore quarantined files.

What to Do After Removing MIMICRAT

1. Prioritize email, financial services, work access, and administrative accounts available on the PC during the incident.

2. From a trusted device, change exposed passwords and revoke suspicious sessions. Review unfamiliar recovery contacts, multifactor methods, mailbox rules, and connected applications.

3. Involve your administrator for work accounts. They may need to review access to other systems as well as the original computer.

4. Contact the bank promptly if you see an unauthorized transfer. Keep the transaction details with the Windows incident record.

Reconstruct the verification attempt

Write down what you were trying to do when the prompt appeared. Include the original website and any unexpected page reached afterward.

Record whether you opened Run, PowerShell, or another command window. Note when you pasted, whether you pressed Enter, and whether Windows requested administrator permission.

If a separate file downloaded, record whether you left it unopened or launched it. Give your responder the filename and download source without repeating either action.

Keep any existing screenshot or browser-history record. Do not return to the compromised page just to recreate the check or obtain a better picture.

Tell workplace security about the attempted verification even if you stopped before execution. It can investigate the page and warn colleagues through the appropriate channel.

Use a trusted device to check security notifications from accounts available during the incident. Record unexpected sign-ins and reject unsolicited multifactor approval requests.

Report privileged work accounts or administration consoles that were open. Your security team can decide which credentials, permissions, and other systems require investigation.

Keep a copy of the provider’s recovery confirmation and any changed account settings. Those records help distinguish completed recovery actions from requests still awaiting attention.

MIMICRAT Details That Help With Investigation

Elastic Security Labs traced the campaign through a compromised BIN-checking service and another compromised website.

The fake verification localized its instructions and delivered a PowerShell-to-loader sequence. Report which command window opened and whether you approved an administrator prompt.

Save the detection name, affected path, action taken, and time. Check whether the report records a blocked download, a quarantined file, or running malware.

Keep PowerShell and other legitimate Windows tools installed. Your responder needs the suspicious execution chain, not the removal of normal system components.

Leave suspected files unopened and preserve relevant browser history. Do not rerun the command or publish sensitive clipboard contents while asking for help.

Frequently Asked Questions

Is MIMICRAT part of Cloudflare?

No. The attack borrowed the appearance of verification. Cloudflare is a legitimate service, not the identified operator of this malware campaign.

Should I finish the verification after closing the command window?

No. Stop using that prompt. If the command already ran, disconnect the PC and continue with the Windows removal response.

Where should I save the antivirus results?

Export or photograph the detection report and keep it with the page address and execution time. Give those records to your responder.

Will a browser reset remove the RAT?

Use the Windows removal procedure. The implant runs outside the browser; resetting Chrome or deleting history is not the cleanup action.

Do I need to pay someone who claims they can remove it remotely?

Do not grant access to unsolicited recovery callers. Use your established IT team or a removal-help channel you open yourself.

What if scans finish but suspicious access continues?

Keep the PC isolated and seek qualified help. Have persistence and account sessions reviewed; a carefully planned rebuild may be needed.

The Bottom Line

Do not run a Windows command to satisfy a browser’s human-verification prompt. Stop at that handoff.

If you executed it, isolate the PC, complete the removal steps, and secure exposed accounts from another trusted device.