7-Zip RAR5 MotW Bypass - Zone.Identifier ADS Absent After Extraction
This rule detects the extraction of files from RAR5 archives using 7-Zip (7z.exe/7zG.exe), followed closely by the execution of a file from a user-writable directory (e.g., Downloads, Temp, AppData). This behavior is characteristic of an attempt to bypass Mark-of-the-Web (MotW) protections, as files extracted from certain container formats may not inherit the original MotW Zone.Identifier alternate data stream, potentially allowing malicious files to execute without standard Windows security warnings.
Microsoft Sentinel (KQL)
