Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/2da85579b259e6de86590e067003e064.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.IRC.Ataka.a Vulnerability: Insecure Permissions Description: The malware creates a dir with insecure permissions under c:\ drive and grants 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: 2da85579b259e6de86590e067003e064 Vuln ID: MVID-2021-0283 Disclosure: 07/12/2021 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:\>dir \Winnt\system32 Volume in drive C has no label. Directory of C:\Winnt\system32 05/10/2002 08:17 PM 2 1433.txt 06/08/2021 02:57 AM 2,456 ght.dll 04/06/2002 10:40 AM 13 hajr.drv 05/09/2002 08:17 PM 29,930 iexplorer4.cab 11/26/2000 09:45 PM 24,576 Msboot.exe 11/03/2000 03:21 PM 560,128 msflxgd.exe 06/08/2021 02:04 AM 3,769 netv.ocx 04/28/2002 05:02 PM 1,571 proxy.reg 09/04/2001 12:39 PM 900,608 ProxyPlus.exe 05/10/2000 09:22 PM 87,584 Rar.exe 04/07/2002 11:09 PM 12 smtp.txt 04/11/2002 07:08 PM 341 syscribe.txt 04/28/2002 05:01 PM 144 wroxy.reg 13 File(s) 1,611,134 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) Malvuln.com (TM).