Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/fb3ac3c9d808de7f4b5ede68715f658f.txt
Contact: malvuln13@gmail.com
Media: twitter.co Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/fb3ac3c9d808de7f4b5ede68715f658f.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan-Downloader.Win32.Agent
Vulnerability: Insecure Permissions
Description: The malware writes a PE file to the "WindowsSystem" directory granting change (C) permissions to the authenticated user group. Standard users can rename the executable dropped by the malware to disable it or replace it with their own executable. Then wait for a privileged user to logon to the infected machine to potentially escalate privileges.
Family: Agent
Type: PE32
MD5: fb3ac3c9d808de7f4b5ede68715f658f
Vuln ID: MVID-2022-0570
Dropped files: alg.exe
Disclosure: 04/26/2022

Exploit/PoC:
C:>cacls WindowsSystemalg.exe
C:WindowsSystemalg.exe BUILTINAdministrators:(ID)F
NT AUTHORITYSYSTEM:(ID)F
BUILTINUsers:(ID)R
NT AUTHORITYAuthenticated Users:(ID)C

C:>dir WindowsSystemalg.exe
Volume in drive C has no label.

Directory of C:WindowsSystem

04/10/2022 01:18 AM 882,688 alg.exe
1 File(s) 882,688 bytes


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