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Microsoft Windows Defender / Trojan.Win32/Powessere.G VBScript Detection Bypass
Posted Feb 19, 2024
Authored by hyp3rlinx | Site hyp3rlinx.altervista.org

This is additional research regarding a mitigation bypass in Windows Defender. Back in 2022, the researcher disclosed how it could be easily bypassed by passing an extra path traversal when referencing mshtml but that issue has since been mitigated. However, the researcher discovered using multiple commas can also be used to achieve the bypass. This issue was addressed. The fix was short lived as the researcher found yet another third trivial bypass. Previously, the researcher disclosed 3 bypasses using rundll32 javascript, but this example leverages the VBSCRIPT and ActiveX engines.

tags | exploit, javascript, activex
systems | windows
SHA-256 | 59fee3164e2fd340144dd80b39280328ebce07f8d7f86686261fc6d4a98c71eb

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