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Backdoor.Win32.Agent.uq MVID-2022-0464 Insecure Permissions

Backdoor.Win32.Agent.uq MVID-2022-0464 Insecure Permissions
Posted Jan 25, 2022
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Agent.uq malware suffers from an insecure permissions vulnerability.

tags | exploit
systems | windows
SHA-256 | c7b8ee3c06630c2fc636502fdf9e2749bb63f74bb86cf6d24f1ceb25e8b9ebaa

Backdoor.Win32.Agent.uq MVID-2022-0464 Insecure Permissions

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Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/b83836d7e6b0893e08d88a7850ca84ee.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Agent.uq
Vulnerability: Insecure Permissions
Description: The malware writes a PE file with a ".sys" extension 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: b83836d7e6b0893e08d88a7850ca84ee
Vuln ID: MVID-2022-0464
Dropped files: MIGBOT.SYS
Disclosure: 01/24/2022

Exploit/PoC:
C:\>cacls MIGBOT.SYS
C:\MIGBOT.SYS BUILTIN\Administrators:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Users:(ID)R
NT AUTHORITY\Authenticated Users:(ID)C

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

Directory of C:\

01/19/2022 06:27 PM 2,432 MIGBOT.SYS
1 File(s) 2,432 bytes
0 Dir(s) 27,604,955,136 bytes free


C:\>type MIGBOT.SYS
MZÉ @ !This program cannot be run in DOS mode.


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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