Backdoor.Win32.Agent.baol Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/1f84a5305b65d7f6aa3afa7e2f2bda0e.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.Agent.baol  
Vulnerability: Insecure Permissions  
Description: The malware writes several PE files with insecure permissions under c drive 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.  
Type: PE32  
MD5: 1f84a5305b65d7f6aa3afa7e2f2bda0e  
Vuln ID: MVID-2022-0495  
Disclosure: 02/21/2022  
  
  
Exploit/PoC:  
C:\>cacls NB_Server.exe  
C:\NB_Server.exe BUILTIN\Administrators:(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Users:(ID)R  
NT AUTHORITY\Authenticated Users:(ID)C  
  
  
C:\>dir NB_Server.exe  
Volume in drive C has no label.  
  
Directory of C:\  
  
02/11/2022 02:10 AM 70,411 NB_Server.exe  
1 File(s) 70,411 bytes  
0 Dir(s) 26,507,804,672 bytes free  
  
C:\>cacls ds1.exe  
C:\ds1.exe BUILTIN\Administrators:(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Users:(ID)R  
NT AUTHORITY\Authenticated Users:(ID)C  
  
C:\>dir ds1.exe  
Volume in drive C has no label.  
  
Directory of C:\  
  
02/11/2022 02:10 AM 0 ds1.exe  
1 File(s) 0 bytes  
0 Dir(s) 26,506,407,936 bytes free  
  
  
  
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