Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/9185538b01ad700603f38fb0eb8b6e3b.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan-Spy.Win32.SpyEyes.abdb
Vulnerability: Insecure Permissions 
Description: The malware creates a dir with insecure permissions under c:\ drive and grants 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: 9185538b01ad700603f38fb0eb8b6e3b
Vuln ID: MVID-2021-0298
Disclosure: 07/18/2021

Exploit/PoC:
C:\>cacls dll.bin
C:\dll.bin 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 dll.bin
 Volume in drive C has no label.

 Directory of C:\dll.bin

06/30/2021  02:08 AM             5,358 744AA42E4B496CC
02/10/2018  01:21 AM           173,056 C5D92788578.exe
               2 File(s)        178,414 bytes


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