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