Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/360bbc9e0926488f085029948ff6c759.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Trojan-Dropper.Win32.Agent.xtp Vulnerability: Insecure Permissions Description: The malware creates an insecure dir named "remove" under c:\ drive and grants change (C) permissions to the authenticated user group. Standard users can rename the executables 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: 360bbc9e0926488f085029948ff6c759 Vuln ID: MVID-2021-0180 Disclosure: 04/21/2021 Exploit/PoC: C:\>cacls remove C:\remove 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 remove Volume in drive C has no label. Directory of C:\remove 04/20/2021 11:54 PM 5,090 clngbuster.reg 04/20/2021 11:54 PM 192 deleta.CMD 04/20/2021 11:54 PM 155 mata.CMD 04/20/2021 11:54 PM 146,232 movefile.exe 04/20/2021 11:54 PM 234,536 psexec.exe 04/20/2021 11:54 PM 187,184 pskill.exe 04/20/2021 11:54 PM 126 remove.CMD 04/20/2021 11:54 PM 237 removeGB.CMD 04/20/2021 11:54 PM 303,616 SetACL.exe 04/20/2021 11:54 PM 2,971 setreg.CMD 10 File(s) 880,339 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).