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Trojan-Downloader.Win32.Genome.omht MVID-2021-0165 Insecure Permissions

Trojan-Downloader.Win32.Genome.omht MVID-2021-0165 Insecure Permissions
Posted Apr 8, 2021
Authored by malvuln | Site malvuln.com

Trojan-Downloader.Win32.Genome.omht malware suffers from an insecure permissions vulnerability.

tags | exploit, trojan
systems | windows
SHA-256 | 4a0f6f4f0e525367b324e98066f8db2493a4e30ceaf46a16696d26d5af3561b1

Trojan-Downloader.Win32.Genome.omht MVID-2021-0165 Insecure Permissions

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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/01055838361f534ab596b56a19c70fef.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan-Downloader.Win32.Genome.omht
Vulnerability: Insecure Permissions
Description: Genome.omht creates an insecure dir named "wjmd97" 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: 01055838361f534ab596b56a19c70fef
Vuln ID: MVID-2021-0165
Dropped files: Jmd2PDF.exe, Receptor.exe, UpdateVIReceptor.exe
Disclosure: 04/07/2021


Exploit/PoC:
C:\>cacls wjmd97
C:\wjmd97 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 wjmd97

C:\wjmd97>dir
Volume in drive C has no label.

Directory of C:\wjmd97

03/11/2016 08:21 AM 73,728 Jmd2PDF.exe
12/19/2017 08:16 AM 17,588,224 Receptor.exe
06/24/2013 12:32 PM 578,629 UpdateVIReceptor.exe
3 File(s) 18,240,581 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).
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