Trojan.ciusky.gen.13: what it is and how to remove it
Trojan.ciusky.gen.13 is the possible false positive or the alert about serious malware. Users are the ones that ask questions and report the pop-up on their machines.
Facts checked October 6, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.
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Trojan.ciusky.gen.13: summary
| Distribution | The threat comes during the installation of a malicious program or from the email that includes dangerous file as the attachment. Many threats can install trojans directly on the computer too |
|---|---|
| Name | Trojan.ciusky.gen.13 |
| Type | Trojan malware or false positive detection caused by incompatibility issues |
| Issues | The virus can create processes and launch programs that trigger damage in the system. Trojan can automatically install other threats and infect the machine further. In most cases, trojans run in the system unnoticed and can vanish the same way – silently |
| Detection names | No Microsoft detection name is known |
| Damage | Not recorded in the old report |
| Removal | Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged. Remove it nowTo use the full-featured product, you have to purchase a license for Fortect. The scan is free. |
Show 4 more facts
| Symptoms | An unknown program in Installed apps |
|---|---|
| Evidence | 4 write-ups by security sites; details still limited |
| First seen | 11 September 2020 |
| Facts checked | 6 October 2026 |
What Trojan.ciusky.gen.13 does on an infected PC
From our report of Sep 2020 · not reviewed since
Malicious files that trigger malware installations can be hidden
Spam emails, promotional campaigns, and other methods that involve deceptive content help to spread malware like trojans, worms, and ransomware, around.
You might not even notice when the malicious file gets dropped on the machine because you fall for the misleading material and open emails with attached files without paying close attention to them.
You should pay attention to senders, email notifications that state about suspicious information, orders, receipts, and promotions. Such email campaigns are designed to trick people into downloading suspicious files as MS documents, PDFs. The best tip would be to delete any suspicious emails once received and avoid clicking on anything that you are not sure about.
From our report of Sep 2020 · not reviewed since
More from our earlier report on Trojan.ciusky.gen.13
- It mainly is related to the BitDefender antivirus tool, so it can definitely be a false positive triggered by compatibility issues between your programs or OS and a tool.
- The best way to tell if the suspicious detection alert is true or not related to any malware- use the alternate anti-malware tools.
- Run a scan using or and check if the antivirus engine finds any intruders.
- If not, it most likely a false positive
- Of you need to remove Trojan.ciusky.gen.13 as a threat that causes issues, you should rely on the particular AV tool that indicated danger for you.
- It is the best way to fight any malware
- Trojans and other more intrusive and dangerous, but silent threats can damage the system significantly and affect functions.
- Rely on optimization software or PC repair tools like that can help fix the damage and corrupted files or programs
What Trojan.ciusky.gen.13 can steal or download
From our report of Sep 2020 · not reviewed since
Trojan.ciusky.gen.13 is the possible false positive or the alert about serious malware.
Users are the ones that ask questions and report the pop-up on their machines. Some AV tools blacklist particular games, applications, and other files due to previously caused issues or related activities. In most of the analyzed cases, files related to streaming, video games, applications that typically get pirated trigger the detection pop-ups.
It is a Windows operating system issue, so when you get the pop-up or find a file on the macOS machine, your device cannot get affected. However, a file like this can show up when you open the malicious attachment.
If so, the real Trojan.ciusky.gen.13 virus might spread on a different device of yours and infect the system there, damage functions, files. You need to determine the particular reason you see these alerts, in the first place, before doing anything else.
If your device is affected by Trojan.ciusky.gen.13 virus, you might encounter crashes and slowdowns that are not related to any other actions or functions of the machine. It enters the computer without any permission and can interfere with various system functions, start malicious activities, or destroy serious files.
Trojan.ciusky.gen.13 is a silent yet very dangerous threat that can be used by hackers to perform various operations from mining cryptocurrency to spreading ransomware around. The threat can hide deep in the system and users do not see any symptoms, so the detection is the only indication that can tell about the infection.
Unfortunately, without anti-malware tools, you cannot remove Trojan.ciusky.gen.13 yourself. There are no programs or files that could be deleted to terminate the virus properly, so the AV engine can show what intruder the system has and eliminate them sully with all the associated files or applications.
Make sure to choose a particular anti-malware tool that is reliable and can help with this Trojan.ciusky.gen.13 removal procedure. We can offer to choose or as your go-to security tools, but remember that mano AV engines use different virus databases and cannot shot the same results or perform the same. This is why you can select from a variety of programs out there.
Trojan.ciusky.gen.13 false positive can occur when you have two separate AV tools on the machine. If you run real-time protection by both software, you can trigger such alerts.
Run one tool and turn off the other, so you can check the system separately. VirusTotal is the platform for uploading malicious files. You can check the purpose of a suspicious file or program there.
How to remove Trojan.ciusky.gen.13
A loader's job is to install other malware, so treat the PC as infected with more than one program until the scans are clean.
Step 1: Delete scheduled tasks that bring it back
Programs like Trojan.ciusky.gen.13 add a scheduled task so they return after an uninstall or reopen a page at every sign-in. Start Task Scheduler, open Task Scheduler Library and sort by Last Run Time to see what ran recently.
On the Actions tab, a program in a user folder, a script or a web address is a warning sign; right-click such a task and choose Delete.
Tasks with names copying Google, Edge or Windows updaters but pointing to an odd folder are typical. The tool looks the same in Windows 11 and Windows 10.
Windows 11: Task Scheduler Library, the task selected, the Actions tab shows the file it runs. Full procedure with screenshots: Remove what malware leaves behind in Windows
Step 2: Remove it from startup
Press Ctrl + Shift + Esc to open Task Manager and select Startup apps (Windows 11) or the Startup tab (Windows 10). Disable entries you do not recognise, especially ones with no publisher or with a name that copies a Windows component.
Right-click an entry and choose Open file location to see where it runs from: programs in
%AppData%or%Temp%deserve a closer look. Some entries are not listed there but in the registry Run keys, which the procedure below shows how to check.Full procedure with screenshots: Stop apps from opening at startup On uGetFix
Step 3: Delete the folders left behind
Uninstalling often leaves the program's folders, and some threats reinstall themselves from them.
Press Windows + R, type
%LocalAppData%and press Enter, then do the same for%AppData%and %ProgramData%, and look for folders named after Trojan.ciusky.gen.13, its publisher or created on the day the problem started. Delete those folders, and check C:\Program Files and C:\Program Files (x86) too.If Windows says a file is in use, end it in Task Manager or delete the folder after a restart in Safe Mode. The folders are the same in Windows 11 and Windows 10.
Full procedure with screenshots: Remove what malware leaves behind in Windows
Step 4: Scan the PC, then run the offline scan
A scan finds the parts of Trojan.ciusky.gen.13 that the manual steps cannot see. In Windows Security > Virus & threat protection > Scan options, start a Full scan and quarantine what it reports.
Follow it with Microsoft Defender Antivirus (offline scan) > Scan now, which restarts the PC and checks the disk while Windows and the malware are not running.
It takes about 15 minutes and works the same in Windows 11 and Windows 10. If either scan finds something, run the full scan again after removal until it comes back clean.
Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Step 5: Change passwords from another device and sign out other sessions
Trojan.ciusky.gen.13 can copy saved passwords, cookies and session tokens and send them out in seconds, so cleaning the PC does not undo the theft.
Change your passwords on a device that was never infected, starting with the e-mail account, since every other reset goes through it. On each account, end all other sessions and check the recovery e-mail, phone number and forwarding rules.
Then turn on two-step verification. Sign in on the Windows 11 or Windows 10 PC again only after the offline scan is clean.
Full procedure with screenshots: Turn on two-step verification / secure a hacked account
Instructions for each browser and system
The detailed steps for every browser and system this guide covers. Open the one you use.
Manual removal using Safe Mode
Important! →
Manual removal guide might be too complicated for regular computer users. It requires advanced IT knowledge to be performed correctly (if vital system files are removed or damaged, it might result in full Windows compromise), and it also might take hours to complete. Therefore, we highly advise using the automatic method provided above instead.
Step 1. Access Safe Mode with Networking
Manual malware removal should be best performed in the Safe Mode environment.
Windows 7 / Vista / XP
- Click Start > Shutdown > Restart > OK.
- When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. - it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
- Select Safe Mode with Networking from the list.
Windows 10 / Windows 8
- Right-click on Start button and select Settings.
- Scroll down to pick Update & Security.
- On the left side of the window, pick Recovery.
- Now scroll down to find Advanced Startup section.
- Click Restart now.
- Select Troubleshoot.
- Go to Advanced options.
- Select Startup Settings.
- Press Restart.
- Now press 5 or click 5) Enable Safe Mode with Networking.
Step 2. Shut down suspicious processes
Windows Task Manager is a useful tool that shows all the processes running in the background. If malware is running a process, you need to shut it down:
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Click on More details.
- Scroll down to Background processes section, and look for anything suspicious.
- Right-click and select Open file location.
- Go back to the process, right-click and pick End Task.
- Delete the contents of the malicious folder.
Step 3. Check program Startup
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Go to Startup tab.
- Right-click on the suspicious program and pick Disable.
Step 4. Delete virus files
Malware-related files can be found in various places within your computer. Here are instructions that could help you find them:
- Type in Disk Cleanup in Windows search and press Enter.
- Select the drive you want to clean (C: is your main drive by default and is likely to be the one that has malicious files in).
- Scroll through the Files to delete list and select the following:
Temporary Internet Files
Downloads
Recycle Bin
Temporary files - Pick Clean up system files.
- You can also look for other malicious files hidden in the following folders (type these entries in Windows Search and press Enter):
%AppData%
%LocalAppData%
%ProgramData%
%WinDir%
After you are finished, reboot the PC in normal mode.
From our report of Sep 2020 · not reviewed since
Check for real threats and get rid of the Trojan.ciusky.gen.13 malware
You may need to remove Trojan.ciusky.gen.13 if it is the virus that managed to get on your device.
However, some compatibility issues and corrupted files can trigger these pop-ups. Try to repair the system with if your diagnostic tools showed no danger and make sure that the computer is working properly.
As it was mentioned, Trojan.ciusky.gen.13 virus is related to particular AV and compatibility issues triggered by games, files, programs, other components. You should re-download files that got removed by the AV tool or trigger the detection alert. Or install the game from scratch or a program, if needed.
If you need help in choosing the anti-malware tool or the process is impossible because the threat blocks your programs try the Safe Mode. You can reboot the PC and then run or to perform Trojan.ciusky.gen.13 removal safely. Such a virus termination method can be followed in the guide below.
After removal: passwords, accounts and prevention
Accounts come next
Because the PC showed trojan.ciusky.gen.13 in the list of installed apps, a sign of a program that could read browser data, the clean-up is only half of the work.
The other half happens in your online accounts.
Change passwords from a clean device, beginning with e-mail; sign out of all sessions; check forwarding rules and recovery phone numbers; and turn on two-step verification with an authenticator app or a passkey. Ask your bank to replace cards saved in the browser.
Why the order matters and what to check in each account: secure your accounts after malware.
Stream videos without limitations, no matter where you are
There are multiple parties that could find out almost anything about you by checking your online activity.
While this is highly unlikely, advertisers and tech companies are constantly tracking you online. The first step to privacy should be a secure browser that focuses on tracker reduction to a minimum.
Even if you employ a secure browser, you will not be able to access websites that are restricted due to local government laws or other reasons. In other words, you may not be able to stream Disney+ or US-based Netflix in some countries. To bypass these restrictions, you can employ a powerful VPN, which provides dedicated servers for torrenting and streaming, not slowing you down in the process.
Data backups are important - recover your lost files
Ransomware is one of the biggest threats to personal data.
Once it is executed on a machine, it launches a sophisticated encryption algorithm that locks all your files, although it does not destroy them. The most common misconception is that anti-malware software can return files to their previous states. This is not true, however, and data remains locked after the malicious payload is deleted.
While regular data backups are the only secure method to recover your files after a ransomware attack, tools such as can also be effective and restore at least some of your lost data.
Questions about Trojan.ciusky.gen.13
Is Trojan.ciusky.gen.13 a virus?
Most programs that appear the way Trojan.ciusky.gen.13 did are not viruses in the strict sense. They are potentially unwanted programs:
- real software that arrives bundled with other downloads and then shows offers
- changes browser settings
- starts with Windows
Some are harmless, some are annoying and a few carry adware. What makes it worth removing is that you did not choose it.
Uninstall it from Installed apps and check the startup list and the browsers for anything added the same day. If it refuses to uninstall or returns after a restart, treat it as more serious and run a Microsoft Defender offline scan.
Trojan.ciusky.gen.13 will not uninstall. What can I do?
First restart the PC and try again, because the program may have been running and locked its own files. If the uninstaller is missing or fails, start Windows in Safe Mode, where most third-party programs do not start, and remove Trojan.ciusky.gen.13 from Installed apps there.
If it still refuses, delete its startup entry and its scheduled task, restart, and try once more. A program that actively prevents removal is behaving like malware, so finish with a Microsoft Defender offline scan. Avoid third-party uninstallers offered on search ads; several of them are unwanted programs themselves.
Do I need to reinstall Windows to get rid of Trojan.ciusky.gen.13?
Usually not. A thorough clean-up is enough when the offline scan finds nothing afterwards and you do not see trojan.ciusky.gen.13 in the list of installed apps again. A reset is the safer choice if an attacker had remote control, if security tools were switched off, or if detections come back after every clean-up.
Windows 11 can reset itself without a USB stick under Settings > System > Recovery > Reset this PC. Copy documents and photos out first and scan the copies. A reset does not change passwords or undo stolen data, so the account steps still apply.
How dangerous is Trojan.ciusky.gen.13?
Treat it as serious until proven otherwise. The visible sign is trojan.ciusky.gen.13 in the list of installed apps, and programs that behave this way often have more abilities than they show:
- copying passwords
- downloading other malware
- giving remote access
Its family is not known yet, so nobody can say which of these it uses. The good news is that the response is the same in every case and takes about an hour:
- cut the network
- remove the startup entry
- run an offline scan
- change passwords from a clean device
If someone had remote control, a full reset is safer.
Why can't I find Trojan.ciusky.gen.13 in antivirus databases?
Because it is new or because it is listed under a different name. Antivirus companies name threats after the family they belong to, and a program that appears as Trojan.ciusky.gen.13 on your PC may carry a generic or unrelated label in their databases.
Many new samples are first detected only by behaviour, without a family name. What you saw, trojan.ciusky.gen.13 in the list of installed apps, is enough to act on:
- end the program
- remove its startup entry
- run a Microsoft Defender offline scan
- secure your accounts
A detection name from a scan is worth noting for later.
I found AnyDesk or ScreenConnect that I did not install. Is that Trojan.ciusky.gen.13?
Not necessarily Trojan.ciusky.gen.13, but it is a warning sign. These are legitimate remote support tools, and criminals use them as ready-made backdoors, especially after tech support scams or fake invoice calls.
If you did not install it and no one you trust set it up, uninstall it, change passwords from a clean device and check your bank account. If someone connected to your PC through it, follow the steps for remote access trojans and consider a Windows reset. Installed apps sorted by date shows when it appeared.
Should I report Trojan.ciusky.gen.13?
Report it if you lost money, if accounts were taken over, if you are a business, or if the trojan came through a scam call. A police or national cybercrime report gives you a reference number for your bank and insurer and helps link cases.
You do not need to report a trojan that antivirus blocked before it ran. Before reporting, write down the dates, the detection name, file names and any messages or transactions linked to the attack; screenshots of antivirus alerts are useful evidence. The country list is in the report section above.
Should I check my other computers too?
Yes, it takes little time and removes doubt. Trojan.ciusky.gen.13 itself usually stays on one PC, but the download that carried it may have been copied to other computers, shared drives may hold the same installer, and an attacker who had access could have tried saved passwords on other devices.
Run a full scan on every Windows PC in the home or office, check shared folders for the original download, and change Wi-Fi and router passwords if they were stored on the infected machine.
How do I know if my PC has Trojan.ciusky.gen.13?
Often you do not, which is the point of a trojan. Possible signs are an antivirus alert naming Trojan.ciusky.gen.13 or a generic trojan detection, unknown programs or scheduled tasks, processes with random names in Task Manager, browser extensions you did not add, security settings turned off, slower performance, or account alerts about logins from unknown places.
The reliable check is a full scan followed by Microsoft Defender's offline scan. If you recently ran a crack, a fake installer or a command a website told you to paste, scan even without symptoms.
Will Fortect remove Trojan.ciusky.gen.13?
Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.
For Trojan.ciusky.gen.13, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.
Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.
Sources
- Steamcommunity: Trojan.Ciusky.Gen.13 virus??? (read October 6, 2026)
- Discussions: How can I remove a Trojan.Ciusky.Gen.13 virus? (read October 6, 2026)
- FTC: How to recognize, remove and avoid malware (read October 6, 2026)
- Microsoft Learn: Microsoft Defender Offline (read October 6, 2026)
- Microsoft Learn: How Microsoft names malware (read October 6, 2026)