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Video Reviews - Security and Privacy
A Microsoft Defender Follow-up
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<blockquote data-quote="Andy Ful" data-source="post: 998577" data-attributes="member: 32260"><p>I cannot say for sure, but this is how can often work cloud-delivered protection + post-infection detection + BAFS. The first victim would be infected, because cloud-delivered protection was too slow to save him. But, in the meantime, fast detection was created in the cloud (Behavior:Win32/Execution.A!ml), and other users can be protected. Furthermore, this detection could work also on the first victim's computer, the encryption could be stopped after some time, but before the malware would encrypt all possible files.</p><p></p><p>Of course, you can be also right in the case when the detection stopped some unimportant part of the attack. We cannot be sure without inspecting the sample.</p><p></p><p></p><p>I have already read this report and that is why I posted about CPL vector before you entered this thread: <a href="https://malwaretips.com/threads/a-microsoft-defender-follow-up.115026/post-998408" target="_blank">Video - A Microsoft Defender Follow-up</a></p><p></p><p>We know that Malware Bazaar can contain only a small portion of malware samples but still, there is a big difference between several hundreds of MSI samples (Magniber and several other malware types) and 0 CPL samples in the period of time VI 2021-VIII 2022. It strongly suggests, that the CPL initial attack vector was extremely rare so far.</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 998577, member: 32260"] I cannot say for sure, but this is how can often work cloud-delivered protection + post-infection detection + BAFS. The first victim would be infected, because cloud-delivered protection was too slow to save him. But, in the meantime, fast detection was created in the cloud (Behavior:Win32/Execution.A!ml), and other users can be protected. Furthermore, this detection could work also on the first victim's computer, the encryption could be stopped after some time, but before the malware would encrypt all possible files. Of course, you can be also right in the case when the detection stopped some unimportant part of the attack. We cannot be sure without inspecting the sample. I have already read this report and that is why I posted about CPL vector before you entered this thread: [URL='https://malwaretips.com/threads/a-microsoft-defender-follow-up.115026/post-998408']Video - A Microsoft Defender Follow-up[/URL] We know that Malware Bazaar can contain only a small portion of malware samples but still, there is a big difference between several hundreds of MSI samples (Magniber and several other malware types) and 0 CPL samples in the period of time VI 2021-VIII 2022. It strongly suggests, that the CPL initial attack vector was extremely rare so far. [/QUOTE]
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