Backdoor.Win32.Mechbot.a Insecure Permissions

Backdoor.Win32.Mechbot.a malware suffers from an insecure permissions vulnerability.

MD5 | 64ea9b60938db7d08ee70a6e3bbc978f

Discovery / credits: Malvuln - (c) 2021
Original source:
Contact: [email protected]

Threat: Backdoor.Win32.Mechbot.a
Vulnerability: Insecure Permissions
Description: The malware creates a dir with insecure permissions under c:\ drive granting change (C) permissions to the authenticated user group. Standard users can rename the executable 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: 8c9e7906d0ad5d0f2267be0057f2a8e3
Vuln ID: MVID-2021-0417
Disclosure: 12/11/2021

C:\>cacls "TitanZone BOT"
C:\TitanZone BOT BUILTIN\Administrators:(OI)(CI)(ID)F
NT AUTHORITY\Authenticated Users:(ID)C
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C

C:\>dir "TitanZone BOT"
Volume in drive C has no label.

Directory of C:\TitanZone BOT

06/15/2003 11:24 AM 591 checkmech
06/15/2003 11:24 AM 21,854 configure
11/19/2021 12:13 AM DIR CONTRIB
05/10/2003 02:07 PM 201,216 CYGWIN1.DLL
05/10/2003 02:07 PM 4,305 GENUSER
07/02/2003 08:44 PM 35 LinkEvents
06/15/2003 11:24 AM 1,391 Makefile
05/10/2003 02:07 PM 22,882
07/02/2003 08:40 PM 6 MECH.PID
07/02/2003 08:45 PM 2,464 MECH.SET
05/10/2003 02:07 PM 796 MKINDEX
11/19/2021 12:13 AM DIR randfiles
11/19/2021 12:13 AM DIR SRC
06/26/2003 09:09 PM 213 titanzone.bat
11/19/2021 12:13 AM DIR TOOLS
05/10/2003 02:07 PM 192,512 WinMech.exe
07/02/2003 08:45 PM 155 winmech.users

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