After discovering the intrusion, FireEye announced earlier this month that sophisticated hackers with “world-class capabilities” had breached its systems and stole the tools it uses to simulate cyberattacks against its clients. That triggered a broader search for signs of tampering at other companies and government agencies, given how widely SolarWinds’ software is used.

Stolen tools you say?

https://www.fireeye.com/blog/threat-research/2020/12/unauthorized-access-of-fireeye-red-team-tools.html

After discovering the intrusion, FireEye announced earlier this month that sophisticated hackers with “world-class capabilities” had breached its systems and stole the tools it uses to simulate cyberattacks against its clients. That triggered a broader search for signs of tampering at other companies and government agencies, given how widely SolarWinds’ software is used.

Stolen tools you say?