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Our powerful app offers security scan features that protect you from robocallers and spammers, and aggressively detects fake texts, phishy links, malicious sites, and annoying ad trackers. An AMSI context may fail to initialize when Microsoft Defender is disabled and no other anti-malware product is present on the user's computer.Protect your device with Malwarebytes - an award-winning internet security app with the malware & ad blocking, filtering, & web security features you need to stay safe.īlock scams and secure your smartphone or tablet. The function returns a HRESULT where S_OK (0) means success. Supply your application name in appName parameter. To use AMSI, a context must be first created with AmsiInitialize(). For instance, the HRESULT return type has been changed to uint and the handle types for the context and session are changed to IntPtr. Note: The function definitions listed in this section have been converted through P/Invoke. Only raw Win32 AMSI APIs are covered here. NET is best avoided since the raw API provides the same functionality as the COM API. Another way to call AMSI is through its COM API but the complexity of COM interop on.

This article is divided into two main sections: the raw API section and the wrapper class section. AMSI is actively used in Microsoft products such as MS Office. Another missing information is the name of malware detected and the type of vulnerability to aid the further investigation. Anti-malware vendor and version are not provided by AMSI even though this information is vital for contacting the anti-malware vendor to report false positive detection. The scanning is done through the anti-malware installed on the user's computer. AMSI is agnostic of the antimalware vendor. Introductionįor those of you who came in and half-expecting a long and complicated article, things couldn't be simpler through Antimalware Scan Interface (AMSI) available on Windows 10 since 2015 to allow the anti-malware scanning on user-supplied content.

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