Discovery / credits: Malvuln - (c) 2022  
Original source:  
Threat: Backdoor.Win32.Bifrose.uw  
Vulnerability: Insecure Permissions   
Description: The malware writes a ".EXE" file with insecure permissions to 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.   
Family: Bifrose  
Type: PE32  
MD5: 9e4f942c60044feef0fb48538ffac383  
Vuln ID: MVID-2022-0535  
Disclosure: 04/06/2022  
C:\>cacls SVCHOST.EXE  
C:\SVCHOST.EXE BUILTIN\Administrators:(ID)F  
NT AUTHORITY\Authenticated Users:(ID)C  
Volume in drive C has no label.  
Directory of C:\  
02/09/2013 06:44 PM 72,407 SVCHOST.EXE  
1 File(s) 72,407 bytes  
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