7-Zip RAR5 MotW Bypass Chain — CVE-2026-43503 Executable Extraction
Detects a suspicious sequence where 7-Zip is used to extract a RAR archive, immediately followed by the creation of executable files (.exe, .bat, .cmd, etc.) in common user-writable directories. This chain often indicates an attempt to bypass Mark-of-the-Web (MotW) protections, as files extracted by archive tools may not inherit the MotW zone information, allowing potentially malicious files to execute without security prompts.
Splunk (SPL)
