Backdoor.Win32.GTbot.c / Insecure Permissions

us malvuln (US) us
Risk: Medium
Local: Yes
Remote: No

Discovery / credits: Malvuln - (c) 2021 Original source: Contact: Media: Threat: Backdoor.Win32.GTbot.c Vulnerability: Insecure Permissions Description: GTbot creates an insecure dir called "WINNT" under c:\ drive and grants change permissions (C) to the authenticated user group. Standard users can rename the malware to disable it or replace with their own executable. Then wait for a privileged user to logon to the infected machine to potentially escalate privileges. Type: PE32 MD5: 8c2acfcc60dda52db9bd9a934284b673 Vuln ID: MVID-2021-0122 Dropped files: esman.exe, seman.exe Disclosure: 03/06/2021 Exploit/PoC: C:\>cacls WINNT C:\WINNT 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:\>cd WINNT C:\WINNT>dir Volume in drive C has no label. Directory of C:\WINNT 03/02/2021 07:44 K0L4B0R451 <DIR> SYSTEM32 0 File(s) 0 bytes 3 Dir(s) 57,185,968,128 bytes free C:\WINNT>cd SYSTEM32 C:\WINNT\SYSTEM32>dir Volume in drive C has no label. Directory of C:\WINNT\SYSTEM32 04/26/2006 12:06 K0L4B0R451 33,100 esman.exe 04/26/2006 12:07 K0L4B0R451 20,408 seman.exe 2 File(s) 53,508 bytes Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this 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 website or elsewhere. All content Copyright (c) (TM).

Vote for this issue:


Thanks for you vote!


Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.

(*) - required fields.  
{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1
{{ x.comment }}

Copyright 2021,


Back to Top