Remove OSFirewall.exe 1-855-270-1376 Fake Security Alert - How to, Technology and PC Security Forum |

Remove OSFirewall.exe 1-855-270-1376 Fake Security Alert

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Security researchers have identified a suspicious pop-up which appears to be caused by the process OSFirewall.exe. Once the process is running actively on the user PC, it displays a pop-up with a scareware message prompting to call the number 1-855-270-1376. In case you see the pop-ups, there is a good chance you might have a virus or a potentially unwanted program that is causing them. It is strongly recommended to scan your device for malware using the instructions provided in the article.

TypeFake tech support pop-up executable
Short DescriptionThe pop-up do various dangerous or unhealthy to the PC activities.
SymptomsUsers may witness fake pop-ups as well as error messages and other pop-ups leading to other potentially harmful domains.
Distribution MethodVia PUPs, added by bundling or by visiting a suspicious third-party site that is advertising it. Likelihood that it may be downloaded by a Trojan onto the affected computer.
Detection ToolDownload Malware Removal Tool, to See If Your System Has Been Affected by OSFirewall.exe
User Experience Join our forum to discuss OSFirewall.exe.

OSFirewall.exe Alert – How Did I Get It

Usually, suspicious executables may be downloaded as a result of having an ad-supported program that displays various advertisements. Such are included in installers when you download free software from suspicious third-party sites. There is also the scenario of you having malware on your computer, such as Trojan.Downloader that may have opened up a port and may actively be downloading other non-allowed software onto your computer from a foreign host.

OSFirewall.exe Alert In Detail

Once the executable is activated onto the victim’s PC, it begins to display pop-ups in Windows that seem very legitimate and would easily fool any user without experience. The pop-up features a scareware message, asking to call 1-855-270-1376. However this may not be the only phone number associated with this cunning tech support scam:

“Security Warning
Suspicious Activity Found
During a routine scan, We’ve found a possible virus, we cannot automatically remove. Please call the number listed below to get step by step guidance to secure your computer.

There is also an additional error message that appears, and it looks like the following:


When the phone number itself was thoroughly researched, we have concluded that there were numerous reports on websites such as okcaller:


The Bottom Line and How To Stop and Remove

In conclusion, this is known as fake tech support scam, pretending to be Windows Firewall. The “customer support” staff may actually be scammers pretending to be Microsoft employees. What the scammers do is convince users into calling the numbers after which extract different information from them. Such information may include their personal credentials (Social security numbers, etc.), their financial information(credit/debit card numbers, security codes, online banking accounts, bitcoin information, etc.) and other. Also, another danger associated with such callers is that they usually subscribe the user without his/her consent to an expensive service that drains money from their SIM card. This is why if you called this number, you should immediately take into consideration blocking it out from your phone and call your operator to block any incoming as well as outgoing connections.

When it comes to the virus itself (OSFirewall.exe), you should follow the instructions provided below to remove it and any other malware that may be associated with it and prevent future intrusions and scams from affecting you.

1. Restore the settings in your browser
2. Remove OSFirewall.exe with SpyHunter Anti-Malware Tool
Optional: Using Alternative Anti-Malware Tools

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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