Emotet, Trickbot, Bazaloader
Advisory: SB2021112505 - Privilege escalation in Microsoft Windows
Vulnerable component: Windows
CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect permissions in windows installer service. A local user can run a specially crafted program to execute arbitrary code with SYSTEM privileges.
The vulnerability exists due to incomplete patch for #VU58061 (CVE-2021-41379).
Note, the vulnerability is being actively exploited in the wild.