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TROJAN-DROPPER.WIN32.INJECTOR.AOBL / Insecure Permissions

CVE Category Price Severity
N/A CWE-434 $500 High
Author Risk Exploitation Type Date
Unknown High Remote 2021-04-28
CVSS EPSS EPSSP
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021040152

Below is a copy:

TROJAN-DROPPER.WIN32.INJECTOR.AOBL / Insecure Permissions
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/842f6f21a2a83792e98900df90c9340b.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Trojan-Dropper.Win32.Injector.aobl
Vulnerability: Insecure Permissions
Description: The malware creates a insecure dir named "winholder" 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: 842f6f21a2a83792e98900df90c9340b
Vuln ID: MVID-2021-0187
Dropped files: 8A4A89B415C.exe
Disclosure: 04/27/2021

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

 Directory of C:\winholder

02/10/2018  01:21 AM         3,485,392 8A4A89B415C.exe
               1 File(s)      3,485,392 bytes


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