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BACKDOOR.WIN32.REMOTEMANIPULATOR / Insecure Permissions EoP

CVE Category Price Severity
N/A CWE-119 Not specified High
Author Risk Exploitation Type Date
Unknown High Local 2021-01-04
CVSS EPSS EPSSP
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/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-2021010010

Below is a copy:

BACKDOOR.WIN32.REMOTEMANIPULATOR / Insecure Permissions EoP
Discovery / credits: malvuln - Malvuln.com (c) 2021
Original source: http://malvuln.com/advisory/82183b3d85311a39fb80ae07357594e5.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: BACKDOOR.WIN32.REMOTEMANIPULATOR
Vulnerability: Insecure Permissions
Description: Creates a dir Folder139 with insecure permissions as it hands authenticated users change permissions (C). The backdoor drops an EXE named audiohd.exe which is not visible unless viewing using dir /a command. There we find the exeuctable audiohd.exe and another hidden DLL vp8encoder.dll

Type: PE32
MD5: 82183b3d85311a39fb80ae07357594e5
Vuln ID: MVID-2021-0005
Dropped files: audiohd.exe, vp8encoder.dll
Disclosure: 01/01/2021
[+] Download advisory


Exploit/PoC:
C:\>cacls C:\Folder139
C:\Folder139 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:\Folder139>dir /a

02/15/2017 09:51 AM 1,486,848 audiohd.exe
07/15/2015 08:19 PM 607,440 vp8encoder.dll


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