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Date: Sat, 2 Jan 2021 17:53:37 -0500
From: malvuln <>
Subject: [FD] BACKDOOR.WIN32.REMOTEMANIPULATOR / Insecure Permissions

Discovery / credits: malvuln - (c) 2021
Original source:

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: 01/02/2021

C:\>cacls C:\Folder139
C:\Folder139 BUILTIN\Administrators:(OI)(CI)(ID)F
             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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