Trojan-Downloader.Win32.VB.abb Insecure Permissions

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/8f81373b0f0e6f60206a1a707de2ed77.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Trojan-Downloader.Win32.VB.abb  
Vulnerability: Insecure Permissions  
Description: The malware creates an executable with an ".axd" extension and 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: 8f81373b0f0e6f60206a1a707de2ed77  
Vuln ID: MVID-2021-0345  
Dropped files: WINDOWSsystem32adoax.axd  
Disclosure: 09/25/2021  
  
Exploit/PoC:  
C:\>cacls WINDOWSsystem32adoax.axd  
C:\WINDOWSsystem32adoax.axd BUILTIN\Administrators:(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Users:(ID)R  
NT AUTHORITY\Authenticated Users:(ID)C  
  
  
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