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Video Reviews - Security and Privacy
Microsoft Defender- Hard to Explain
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<blockquote data-quote="Andy Ful" data-source="post: 1002147" data-attributes="member: 32260"><p>Yes, the Magniber MSI samples show that the Defender's detection of some MSI files is weird. We already talk about it on another thread (Magniber thread). For some reason (known only to Microsoft), several Magniber MSI samples are not locked (can be run) even when they are locally detected by Microsoft. Furthermore, these samples are not automatically remediated.</p><p><strong>The only way is to perform the manual scan of each sample, follow the Defender alert, and choose the action (file is quarantined). This procedure is not optimal.</strong></p><p>[URL unfurl="false"]https://malwaretips.com/threads/microsoft-defender-vs-magniber.114690/post-998676[/URL]</p><p></p><p>The Magniber MSI samples show, that for now, Microsoft does not recognize Magniber MSI files as dangerous.</p><p>From my tests it follows, that Defender can automatically detect and remediate archives (ZIP, RAR, 7-ZIP) downloaded from the Internet (BAFS is used for that), even when they are password protected. Several Magniber samples from Malware Bazaar are also detected in this way. My guess is that many Magniber MSI samples were delivered in the wild via archives, so they were properly detected and remediated by BAFS shortly after the first attacks. On the contrary, the uncompressed samples (MSI files) are not detected via BAFS at all, so Defender will fail in tests similar to those made by [USER=7463]@cruelsister[/USER].</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 1002147, member: 32260"] Yes, the Magniber MSI samples show that the Defender's detection of some MSI files is weird. We already talk about it on another thread (Magniber thread). For some reason (known only to Microsoft), several Magniber MSI samples are not locked (can be run) even when they are locally detected by Microsoft. Furthermore, these samples are not automatically remediated. [B]The only way is to perform the manual scan of each sample, follow the Defender alert, and choose the action (file is quarantined). This procedure is not optimal.[/B] [URL unfurl="false"]https://malwaretips.com/threads/microsoft-defender-vs-magniber.114690/post-998676[/URL] The Magniber MSI samples show, that for now, Microsoft does not recognize Magniber MSI files as dangerous. From my tests it follows, that Defender can automatically detect and remediate archives (ZIP, RAR, 7-ZIP) downloaded from the Internet (BAFS is used for that), even when they are password protected. Several Magniber samples from Malware Bazaar are also detected in this way. My guess is that many Magniber MSI samples were delivered in the wild via archives, so they were properly detected and remediated by BAFS shortly after the first attacks. On the contrary, the uncompressed samples (MSI files) are not detected via BAFS at all, so Defender will fail in tests similar to those made by [USER=7463]@cruelsister[/USER]. [/QUOTE]
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