Also, many free software installations offer to install other software, such as Web Companion potentially unwanted application additionally, to spread throughout your computer. Such applications deceive users by forcing them to purchase the full version of the program. How did Web Companion potentially unwanted application get on my PC? Monetary loss (unnecessary purchase of fake software), unwanted warning pop-ups, slow computer performance. ![]() Asks for payment in order to eliminate the supposedly found errors.ĭeceptive pop-up ads, free software installers (bundling), fake flash player installers. New application is performing computer scans and displays warning messages about found issues. Web Companion potentially unwanted applicationĭrWeb (Program.Unwanted.3914), ESET-NOD32 (A Variant Of MSIL/WebCompanion.C Potentially Unwanted), Fortinet (Riskware/WebCompanion), Sophos AV (Generic PUA BJ (PUA))Ī program that you don't recall installing suddenly appeared on your computer. Web Companion potentially unwanted application shows fake results without fixing the problems at all. Web Companion potentially unwanted application doesn't actually fix the problems it detects or performs the rest of the tasks. PUA or PUP is not credible as applications are distributed by this method. Because of this, they are classified as potentially unwanted applications. Users often download/install such programs without knowing what they really mean. However, developers create such applications based on other programs that are installed on your computer. Web Companion potentially unwanted application is one of the many system optimization tools that supposedly fix various bugs on your PC. "However, this technique is well documented and used by developers quite often.Category: Potentially unwanted application "There are no known attempts by threat actors to load malicious browser extensions using this PowerShell technique, outside of ChromeLoader. "In the particular case of ChromeLoader, the overall impact appears to be relatively low since the malware has only been observed redirecting user traffic to spam sites," Russell said. In addition, because of its capabilities as a command and scripting interpreter, PowerShell will always be a top command-execution method for threat actors. If a bad actor determines that ChromeLoader's method is effective for loading a malicious extension, they will likely use it, he said. While ChromeLoader used disguised ISO files to deliver it, many enterprises are now monitoring or blocking ISOs from the internet because they are popular ways to deliver other malware. "While other bad actors could capitalize on this method, they still need to place a portable executable on the victim machine to ultimately use the load-extension PowerShell technique." "This is a novel method for loading a malicious extension into Chrome that I have not seen before, nor has it been observed by Red Canary's intelligence team in other malware," he said. Once the scheduled task executes PowerShell and loads the extension, it is silently removed with the PowerShell module invoke schtasks.exe and is often less frequently monitored as an anti-forensic technique, according to Russell. Instead, ChromeLoader creates its scheduled task via injection into the Service Host (svchost.exe), using functionality from an imported Task Scheduler COM API." "It uses a scheduled task, but not by using the Windows native Task Scheduler (schtasks.exe) to do so. ![]() "While not using groundbreaking techniques, ChromeLoader has found success in its stealthier persistence mechanisms," Russell told The Register.
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