1stBrowser
Posted: June 4, 2015
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
Ranking: | 13,371 |
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Threat Level: | 1/10 |
Infected PCs: | 8,172 |
First Seen: | May 26, 2015 |
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Last Seen: | February 26, 2025 |
OS(es) Affected: | Windows |
1stBrowser is a free software created and developed by SIEN S.A. that is marketed as the best browser for chatting, downloading, shopping, etc. 1stBrowser claims to provide users with plenty of conveniences. 1st Browser offers a social sidebar to stay connected and also claims to save money and time while being a user-friendly application. However, 1stBrowser is classified as a Potentially Unwanted Program (PUP) that has adware capabilities. In reality, 1stBrowser is a misleading application and users might easily be tricked into downloading it from their official website at 1stBrowser.com. However, adware creators also utilize questionable delivery methods such as bundling 1stBrowser with other freeware. Either way, once 1stBrowser has infiltrated your computer, you may notice plenty of advertisements. At first glance, 1stBrowser ads may seem appealing, but in reality, they are tailored and based on your browsing history. Also, 1stBrowser is not a reliable web browser as it constantly keeps track of your activities and utilizes this information for marketing purposes. Computer security experts advise users to remove 1stBrowser using a trusted anti-malware product.
Technical Details
Registry Modifications
File name without path1stBrowser.lnkRegexp file mask%WINDIR%\System32\Tasks\1stbrowserHKEY..\..\..\..{RegistryKeys}Software\1stBrowserSOFTWARE\Classes\.gif\OpenWithProgids\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.gif\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.htm\OpenWithProgIds\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.htm\OpenWithProgIds\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.html\OpenWithProgIds\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.html\OpenWithProgIds\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.jpeg\OpenWithProgids\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.jpeg\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.jpg\OpenWithProgids\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.jpg\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.pdf\OpenWithProgids\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.pdf\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.png\OpenWithProgids\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.png\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.shtml\OpenWithProgids\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.shtml\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.webp\OpenWithProgids\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.webp\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.xht\OpenWithProgIds\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.xht\OpenWithProgIds\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Classes\.xhtml\OpenWithProgIds\1stBrowHTM.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Classes\.xhtml\OpenWithProgIds\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Classes\CLSID\BE990DFE-888B-46D7-86D7-877F219F2CE6Software\Classes\Wow6432Node\CLSID\BE990DFE-888B-46D7-86D7-877F219F2CE6SOFTWARE\Microsoft\MediaPlayer\ShimInclusionList\1stbrowser.exeSOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\1stbrowserSOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\1stbrowser.exeSoftware\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.gif\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jpeg\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jpg\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.png\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.shtml\OpenWithProgids\1stBrowHTM.NSJA6BHDA3NCFCFMXW3QSCUYUQSoftware\Microsoft\Windows\CurrentVersion\Run\1stbrowserSOFTWARE\RegisteredApplications\1stBrowser.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\RegisteredApplications\1stBrowser.NSJA6BHDA3NCFCFMXW3QSCUYUQSOFTWARE\Wow6432Node\Microsoft\MediaPlayer\ShimInclusionList\1stbrowser.exeSOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\App Paths\1stbrowser.exeSOFTWARE\Wow6432Node\RegisteredApplications\1stBrowser.7FK27EPBSU3G7VAQT43UZVCK74SOFTWARE\Wow6432Node\RegisteredApplications\1stBrowser.NSJA6BHDA3NCFCFMXW3QSCUYUQHKEY_LOCAL_MACHINE\Software\[APPLICATION]\Microsoft\Windows\CurrentVersion\Uninstall..{Uninstaller}1stBrowser
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