The Russia-linked nation-state threat actor tracked as APT28 weaponized a security flaw in the Microsoft Windows Print Spooler component to deliver a previously unknown custom malware called GooseEgg.
The post-compromise tool, which is said to have been used since at least June 2020 and possibly as early as April 2019, leveraged a now-patched flaw that allowed for
Russia’s APT28 Exploited Windows Print Spooler Flaw to Deploy ‘GooseEgg’ Malware
