Trojan-Dropper.Win32.Agent.xtp Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/360bbc9e0926488f085029948ff6c759.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Trojan-Dropper.Win32.Agent.xtp  
Vulnerability: Insecure Permissions  
Description: The malware creates an insecure dir named "remove" under c:\ drive and grants change (C) permissions to the authenticated user group. Standard users can rename the executables 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: 360bbc9e0926488f085029948ff6c759  
Vuln ID: MVID-2021-0180  
Disclosure: 04/21/2021  
  
  
Exploit/PoC:  
C:\>cacls remove  
C:\remove BUILTIN\Administrators:(OI)(CI)(ID)F  
NT AUTHORITY\SYSTEM:(OI)(CI)(ID)F  
BUILTIN\Users:(OI)(CI)(ID)R  
NT AUTHORITY\Authenticated Users:(ID)C  
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C  
  
  
C:\>dir remove  
Volume in drive C has no label.  
  
Directory of C:\remove  
  
04/20/2021 11:54 PM 5,090 clngbuster.reg  
04/20/2021 11:54 PM 192 deleta.CMD  
04/20/2021 11:54 PM 155 mata.CMD  
04/20/2021 11:54 PM 146,232 movefile.exe  
04/20/2021 11:54 PM 234,536 psexec.exe  
04/20/2021 11:54 PM 187,184 pskill.exe  
04/20/2021 11:54 PM 126 remove.CMD  
04/20/2021 11:54 PM 237 removeGB.CMD  
04/20/2021 11:54 PM 303,616 SetACL.exe  
04/20/2021 11:54 PM 2,971 setreg.CMD  
10 File(s) 880,339 bytes  
  
  
  
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