Backdoor.Win32.Agent.uq malware suffers from an insecure permissions vulnerability.
b9276b9f5e15d961ec95de902d875e18Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/b83836d7e6b0893e08d88a7850ca84ee.txt
Contact: [email protected]
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.
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