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Trojan-Dropper.Win32.Scrop.dyi MVID-2021-0262 Insecure Permissions

Trojan-Dropper.Win32.Scrop.dyi MVID-2021-0262 Insecure Permissions
Posted Jun 28, 2021
Authored by malvuln | Site malvuln.com

Trojan-Dropper.Win32.Scrop.dyi malware suffers from an insecure permissions vulnerability.

tags | exploit, trojan
systems | windows
SHA-256 | b441fde6d9d688819e5a6d44c127c549633b249a0905d34d885c9ae37e5210fe

Trojan-Dropper.Win32.Scrop.dyi MVID-2021-0262 Insecure Permissions

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/af207a19fbe313e3f7e123b6b2acffd4.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan-Dropper.Win32.Scrop.dyi
Vulnerability: Insecure Permissions
Description: The malware creates a hidden dir named "gFnFILdc" 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: af207a19fbe313e3f7e123b6b2acffd4
Vuln ID: MVID-2021-0262
Dropped files: VsPsGUhq.exe
Disclosure: 06/25/2021


Exploit/PoC:
C:\>cacls gFnFILdc
C:\gFnFILdc 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 /a gFnFILdc
Volume in drive C has no label.

Directory of C:\gFnFILdc

11/29/2017 08:39 AM 1,241,650 VsPsGUhq.exe
1 File(s) 1,241,650 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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