Active North Korean campaign targeting security researchers

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In addition to targeting researchers with 0-day exploits, the threat actors also developed a standalone Windows tool that has the stated goal of ‘download debugging symbols from Microsoft, Google, Mozilla and Citrix symbol servers for reverse engineers.’ The source code for this tool was first published on GitHub on September 30, 2022, with several updates being released since. On the surface, this tool appears to be a useful utility for quickly and easily downloading symbol information from a number of different sources. Symbols provide additional information about a binary that can be helpful when debugging software issues or while conducting vulnerability research.

But the tool also has the ability to download and execute arbitrary code from an attacker-controlled domain. If you have downloaded or run this tool, TAG recommends taking precautions to ensure your system is in a known clean state, likely requiring a reinstall of the operating system.

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