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Date: Tue, 2 Feb 2021 22:27:29 -0500
From: malvuln <>
Subject: [FD] Backdoor.Win32.RemoteManipulator.brr / Insecure Permissions EoP

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

Threat: Backdoor.Win32.RemoteManipulator.brr
Vulnerability: Insecure Permissions EoP
Description: This malware creates a dir named "eaKVB87.tmp" under c:\
and grants change (C) permissions to authenticated users group. This
can result in EoP as any authenticated user can modify its dir.
Type: PE32
MD5: 717f316391b6a7b97fa160b0a627a413
Vuln ID: MVID-2021-0067
Dropped files: citoCavb.vbs, N0731337.bak, taskhosteo.exe, vp8encoder.dll
Disclosure: 02/02/2021

C:\>cacls C:\eaKVB87.tmp
C:\eaKVB87.tmp BUILTIN\Administrators:(OI)(CI)(ID)F
               NT AUTHORITY\SYSTEM:(OI)(CI)(ID)F
               NT AUTHORITY\Authenticated Users:(ID)C
               NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C

C:\>cacls C:\eaKVB87.tmp\taskhosteo.exe
C:\eaKVB87.tmp\taskhosteo.exe BUILTIN\Administrators:(ID)F
                              NT AUTHORITY\SYSTEM:(ID)F
                              NT AUTHORITY\Authenticated Users:(ID)C

Directory of c:\eaKVB87.tmp

03/27/2017  01:38 AM            42,320 citoCavb.vbs
01/27/2021  08:36 PM                 0 N0731337.bak
03/21/2017  08:11 PM         3,968,512 taskhosteo.exe
09/01/2016  07:44 AM         1,639,336 vp8encoder.dll

Disclaimer: The information contained within this advisory is supplied
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advisory, provided that it is not altered except by reformatting it,
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information. The author prohibits any malicious use of security
related information or exploits by the author or elsewhere. Do not
attempt to download Malware samples. The author of this website takes
no responsibility for any kind of damages occurring from improper
Malware handling or the downloading of ANY Malware mentioned on this
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