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Showing posts from February, 2023

GuLoader... analysing malicious PDF, VBS and PowerShell

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I came across a sample recently that looked interesting because of the number of steps in the infection chain and the use of PowerShell to inject shell code into an existing legitimate process so I though I would have a go at analysis. For this analysis I will go as far as I can using just static analysis and fall back to dynamic analysis when I hit my limits. The initial payload is a PDF file which I will take a look at now.