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HighSigmaHQSwachchhanda Shrawan Poudel (Nextron Systems)

Uncommon File Created by Notepad++ Updater Gup.EXE

Detects when the Notepad++ updater (gup.exe) creates files in suspicious or uncommon locations. This could indicate potential exploitation of the updater component to deliver unwanted malware or unwarranted files.

Detection logic

Detection requirements

Platform
LinuxmacOSNetwork DevicesWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source product
windows
Log source category
file_event

Known benign triggers

  • Custom or portable Notepad++ installations in non-standard directories.
  • Legitimate update processes creating temporary files in unexpected locations.

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