BACKDOOR.WIN32.REMOTEMANIPULATOR malware suffers from an insecure permissions vulnerability.
7864c5aeb2b19a8922a5abecf439eba2Discovery / 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: 01/02/2021
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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