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Ransomware Builder Babuk Insecure Permissions Vulnerability
Discovery / credits: Malvuln - malvuln.com (c) 2022 Original source: https://malvuln.com/advisory/5dfa998f62612e10d5d28d26948dd50f.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Ransomware Builder Babuk Vulnerability: Insecure Permissions Description: The malware creates directorys with insecure permissions when write to 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: 5dfa998f62612e10d5d28d26948dd50f Vuln ID: MVID-2022-0461 Disclosure: 01/19/2022 Exploit/PoC: C:\>builder.exe Usage: builder.exe FolderName C:\>builder.exe c:\hate Creating folder 'c:\hate' curve25519 keys generated. "c:\hate\e_win.exe" written! "c:\hate\d_win.exe" written! "c:\hate\e_esxi.out" written! "c:\hate\d_esxi.out" written! "c:\hate\e_nas_x86.out" written! "c:\hate\d_nas_x86.out" written! "c:\hate\e_nas_arm.out" written! "c:\hate\d_nas_arm.out" written! "c:\hate\kp.curve25519" written! "c:\hate\ks.curve25519" written! Press any key to continue . . . C:\>cacls \hate C:\hate 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 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). # 0day.today [2024-10-06] #