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What kind of malware is JSCEAL?
JSCEAL is an information stealer targeting mainly cryptocurrency applications. Cybercriminals use malicious ads to trick victims into downloading fake apps that mimic nearly 50 popular cryptocurrency trading platforms. If JSCEAL is detected on the system, it should be eliminated as soon as possible.
More about JSCEAL
The JSCEAL attack includes three main stages. First, victims are tricked into downloading a fake cryptocurrency app installer. Next, the malware runs scripts that collect detailed information about the system (e.g., installed programs, system settings, network info) and send it to the attackers.
If the target system is identified as worthwhile, the attackers install the final JSCEAL payload. This advanced malware is made to take full control of the infected computer and avoid detection by normal security programs. It also uses complicated code to hide its operations.
JSCEAL's primary goal is to steal sensitive information, especially related to cryptocurrency. It uses multiple techniques to achieve this, including gathering detailed machine and user data, collecting browser cookies, and stealing saved passwords. It also targets Telegram accounts, takes screenshots, and records keystrokes (keylogging).
Moreover, JSCEAL can manipulate cryptocurrency wallets and web extensions and perform advanced attacks to intercept and alter communications. This stealer also acts as a Remote Access Trojan (RAT), allowing attackers to run PowerShell commands remotely. It also has modules for mouse tracking and control to automate user interactions more effectively.
| Name | JSCEAL information stealer |
| Threat Type | Stealer |
| Detection Names | Avast (Other:Malware-gen [Trj]), Combo Cleaner (Generic.MSIL.WMITask.H.2BADF324), ESET-NOD32 (Win32/GenCBL.FUU), Kaspersky (HEUR:Trojan.OLE2.Agent.gen), Symantec (Trojan Horse), Full List (VirusTotal) |
| Symptoms | Trojans are designed to stealthily infiltrate the victim's computer and remain silent, and thus no particular symptoms are clearly visible on an infected machine. |
| Distribution methods | Malicious ads, social media, deceptive websites, fake applications. |
| Damage | Stolen passwords and banking information, identity theft, the victim's computer added to a botnet. |
| Malware Removal (Windows) |
To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. Download Combo CleanerTo use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by RCS LT, the parent company of PCRisk.com. |
Conclusion
JSCEAL is a powerful malware designed to pilfer data from infected systems. By stealing passwords, wallet information, and other sensitive details, it can cause serious financial damage, lead to identity theft, and cause other issues. Such malware should be removed immediately if detected on a system.
More examples of information stealers are RMC, Leet, and SHUYAL.
How did JSCEAL infiltrate my computer?
Users typically infect their computers with JSCEAL malware by downloading fake cryptocurrency applications promoted through deceptive online advertisements. These ads often mimic legitimate platforms (e.g., TradingView, Monero, or TrustWallet) and are presented using various websites and Facebook (or other social media channels).
Upon clicking the malicious ad, users are redirected to fraudulent sites that offer fake apps or browser extensions. During installation, the installer can open a window to show the website of the real app to prevent the victim from noticing anything suspicious.
Once downloaded and installed, these fake applications execute scripts that collect system information and prepare the device for the final payload. The final JSCEAL payload is then deployed, enabling the attackers to steal personal information and perform other malicious activities.
How to avoid installation of malware?
Download applications and files from official websites and do not trust pop-ups, ads, links, etc., on questionable web pages. Also, never download pirated programs or tools designed to bypass software activation. Do not agree to receive notifications from shady sites.
Update the operating system and installed apps regularly. Use a reliable security tool. Examine emails before interacting with their contents. Do not open files or links in unexpected or irrelevant emails (or other types of messages) from unknown senders. If you believe that your computer is already infected, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate infiltrated malware.
Malicious ads on Facebook used to promote fake sites (source: checkpoint.com):
Decoy website opened if the user does not meet the campaign's criteria (source: checkpoint.com):
Fake TradingView website (source: checkpoint.com):
The real app's website displayed using webview to avoid suspicion (source: checkpoint.com):
How to remove malware manually?
Most trojan infections can be removed by running a full system scan with Combo Cleaner. The full manual procedure below is for cases where automatic removal failed, where you want to verify a scan caught everything, or where the threat has multiple persistence points.
Disconnect from the network
Unplug your Ethernet cable and turn off Wi-Fi. If you're on a laptop, the airplane-mode key works fastest.
Many trojans exfiltrate data - saved browser passwords, banking sessions, screenshots - and accept remote commands. Cutting the network stops both immediately. Keep it disconnected until Phase 4.
Boot into Safe Mode with Networking
Safe Mode loads a minimal set of drivers and stops most malware from auto-running. "With Networking" lets you download tools - re-enable Wi-Fi only after you've booted in.
Open . Click Restart now next to Advanced startup.
Your computer will restart into the "Choose an option" menu. Click . After the second reboot, press 5 or F5.
Click the Windows logo, hold Shift, click the Power icon and choose Restart. In the Choose an option screen, click . Press F5.
Windows 8
Go to the Start Screen, type Advanced, select Settings → Advanced startup options → Restart now → Troubleshoot → Advanced options → Startup settings → Restart → F5.
Note: Windows 8 reached end-of-life in January 2023 - running on it puts you at much higher risk of reinfection.
Windows 7
Click Start → Shut Down → Restart → OK. As the system boots, press F8 repeatedly until the Windows Advanced Options menu appears, then choose Safe Mode with Networking.
Note: Windows 7 reached end-of-life in January 2020 - running on it puts you at much higher risk of reinfection.
Inspect running processes with Process Explorer
Download Process Explorer from Microsoft Sysinternals. Run it as Administrator. Click and .
Sort by "Verified Signer." Anything unsigned running from %AppData%, %LocalAppData%, %Temp%, or %ProgramData% is suspicious. Right-click → Properties to see the full image path. Right-click → "Search Online" to look up unfamiliar process names.
Task Manager hides full file paths, doesn't show digital signatures, and groups processes in ways that make malware easy to miss. Process Explorer is the same tool Microsoft engineers use.
Map every persistence point with Autoruns
Download Autoruns. Right-click Autoruns.exe and choose Run as administrator - without elevation, Autoruns can't inspect protected registry hives.
In the menu, open and , then click Refresh.
Modern trojans don't just live in startup. Walk through these tabs and look for unsigned or unfamiliar entries:
- Logon - classic Run/RunOnce keys
- Scheduled Tasks - frequent hiding spot, especially tasks with PowerShell, MSHTA, or rundll32 actions
- Services - unsigned services in non-Microsoft folders
- WMI - Event Subscriptions are a stealthy persistence mechanism (MITRE T1546.003)
- Image Hijacks - Image File Execution Options "Debugger" abuse
- AppInit - DLLs loaded into every GUI process
- Browser plug-ins - unsigned add-ons across all installed browsers
Right-click any suspicious entry → "Jump to Image" to see the actual file. Right-click → "Search Online" opens VirusTotal for the file hash. Don't delete yet - just write down the file paths and entry names. We'll remove them after the scans.
Check the hosts file and DNS settings
Trojans often redirect bank, antivirus, and update domains to attacker-controlled servers by editing the hosts file or DNS settings.
Hosts file: Open Notepad as Administrator and open C:\Windows\System32\drivers\etc\hosts. Legitimate entries are commented with #. Any uncommented IP-to-domain mapping is suspicious - especially redirects for microsoft.com, windowsupdate, or your bank.
DNS settings: Open Command Prompt as Administrator and run ipconfig /all. Confirm your DNS servers point to your ISP, your router, or a known public resolver (Cloudflare 1.1.1.1, Google 8.8.8.8). Then open and verify both DNS and DNS over HTTPS (DoH) settings haven't been hijacked.
A clean PC with hijacked DNS is still a compromised PC. You'll think you're at chase.com and you'll be at the attacker's clone.
No single antivirus catches everything. The order below is intentional: offline scan first (catches rootkits before Windows fully loads), then on-demand scanners on the running system, then manual cleanup of anything they missed.
Run Microsoft Defender Offline
Reboot to normal Windows. Open . Select Microsoft Defender Antivirus (offline scan) and click Scan now. Your computer will restart into a stripped-down environment and scan before the full operating system loads.
Rootkits and bootkits hide from any scanner running on the same Windows session that's already infected. A pre-boot offline scan sees the disk before the malware can hide itself.
VB100 certified. Includes anti-trojan, registry/persistence scanning, anti-spyware in one pass. The 7-day free trial is available.
Download Combo CleanerRun Combo Cleaner full system scan
Install Combo Cleaner and run a full system scan (not the quick scan). Let it complete fully, review the detected threats, and apply the recommended actions. Combo Cleaner will quarantine known trojans and registry persistence.
Run Microsoft Safety Scanner as a second-opinion scan
Download Microsoft Safety Scanner (MSERT.exe), Microsoft's free on-demand tool. The binary expires every 10 days, which means every download has the latest signatures. Run a full scan after Combo Cleaner to catch anything one engine alone might miss.
Different scanning engines catch different threats. Running an additional Microsoft scan after Combo Cleaner is the single most underused verification step in malware removal.
Manually remove anything still listed in Autoruns
Reopen Autoruns. Anything you flagged in Step 4 that's still present hasn't been caught by the automated scans. For each remaining suspicious entry: right-click → Delete in Autoruns (this removes the persistence registration), then navigate to the file path and delete the actual file. Empty the Recycle Bin.
Some malware files reappear after deletion because something else on the system recreates them. If you delete a file and it returns within minutes, you have a remaining persistence point that Autoruns didn't show - usually a service or scheduled task running under SYSTEM. Re-run the scans from Steps 6-8 or proceed to a clean install (see end of guide).
Reset browsers and clear notification permissions
Trojans and adware frequently hijack browsers - change the default search engine, install rogue extensions, or grant themselves notification permissions to keep displaying scam pop-ups even after the malware is gone.
- Chrome: visit
chrome://settings/resetand click "Restore settings to their original defaults." Then visitchrome://settings/content/notificationsand remove any unfamiliar sites. - Edge: visit
edge://settings/reset. Then checkedge://settings/content/notifications. - Firefox: open
about:supportand click Refresh Firefox (Firefox uses "Refresh," not "Reset"). Then check Settings → Privacy & Security → Permissions → Notifications.
Review installed extensions in each browser and remove anything you don't recognize, especially extensions you didn't install yourself.
Re-enable Defender, Tamper Protection, and update everything
Many trojans disable security software. Open and confirm Real-time protection, Cloud-delivered protection, and Tamper Protection are all turned on. Tamper Protection prevents malware from disabling Defender silently.
Then run Windows Update () and update your browsers and applications. The infection vector that let the trojan in originally usually involves outdated software.
Change passwords from a clean device
If the trojan was an info-stealer (Lumma, RedLine, Vidar, and similar are extremely common), assume every password saved in your browser is compromised. Change them from a different, known-clean device - your phone is fine if it's not infected.
Recommended order:
- Primary email first - it's the recovery hub for everything else
- Banking and financial accounts
- Password manager master password (if you use one)
- Social media, shopping, and remaining accounts
Where available, enable phishing-resistant multi-factor authentication (passkeys / FIDO2 hardware keys / authenticator apps) - SMS-based MFA is bypassable by sophisticated attackers.
Verify the clean and monitor for 7 days
Reconnect to the network and run one final full scan with Combo Cleaner. Open Task Manager (Ctrl + Shift + Esc) and switch to the Startup apps tab - confirm nothing suspicious has reappeared.
Over the next 7 days, watch for symptom recurrence: unexpected high CPU usage, unknown processes returning, browser redirects, or pop-ups. If anything returns, you missed a persistence point and the procedure needs to be repeated - or you may have a deeper compromise that requires a clean install.
When to clean install Windows instead
Manual removal isn't always the right answer. Reinstalling Windows from scratch is the only way to be 100% certain when:
- The malware reappears after every removal attempt
- A bootkit or UEFI rootkit was detected (this class of threat sits below the operating system and survives a normal Windows reinstall)
- A confirmed credential-theft trojan ran with administrator privileges (Lumma, RedLine, Vidar) - the system likely has multiple unknown payloads
- The PC is used for online banking, business email, or anything where partial doubt isn't acceptable
A clean install is a 30-60 minute process: Windows 11 reinstall via . Back up documents to external storage first, scan the backup with Combo Cleaner before restoring it, and reinstall applications fresh - never restore them from a backup of the infected system.
Important: Manual removal requires advanced computer skills. If you're not confident identifying system files from malicious files, run an automated scan with Combo Cleaner and Windows Defender and stop there - that path catches the vast majority of consumer trojans without the risk of breaking Windows by deleting the wrong file.
Frequently Asked Questions (FAQ)
My computer is infected with JSCEAL malware, should I format my storage device to get rid of it?
Formatting your storage device will definitely remove JSCEAL malware, but it is a drastic step that results in losing all your data. Before formatting, try running a full system scan with a reliable antivirus or anti-malware tool like Combo Cleaner.
What are the biggest issues that malware can cause?
Malware can cause major issues such as monetary loss, theft of personal and sensitive data, system damage, privacy breaches, and unauthorized access to accounts or devices.
What is the purpose of JSCEAL?
The purpose of JSCEAL is to steal sensitive information from victims, mainly targeting cryptocurrency-related data. It collects details like device info, browser cookies, passwords, and crypto wallet data, while also providing remote control of the infected device.
How did JSCEAL infiltrate my computer?
Users usually get infected with JSCEAL by downloading fake cryptocurrency apps advertised through deceptive online ads that mimic trusted platforms like TradingView or TrustWallet. These ads, often spread via websites and social media, lead users to fraudulent sites offering counterfeit apps or browser extensions.
Will Combo Cleaner protect me from malware?
Yes, Combo Cleaner can detect and remove nearly all known malware infections. However, advanced malware often hides deep within the system, so performing a full system scan is required.
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Tomas Meskauskas
Expert security researcher, professional malware analyst
I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats.
PCrisk security portal is brought by a company RCS LT.
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