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(Writeup) LetsDefend Challenge - MSHTML

February 14 2026

LetsDefend Challenge Hard Malware Oletools Security_Analyst Writeup

Analyzing malicious Office documents exploiting MSHTML (CVE-2021-40444), using oletools to extract indicators, identify malicious domains and IPs, and investigate document-based exploitation.

(Writeup) LetsDefend Challenge - Excel 4.0 Macros

February 14 2026

LetsDefend Challenge Macros Malware Medium Oletools Security_Analyst Writeup XLM XLMMacroDeobfuscator

Analyzing a malicious Excel 4.0 (XLM) macro document using XLMMacroDeobfuscator and oletools to identify process execution, regsvr32 abuse, and DLL payload behavior.

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