Trojan.Win32.Agentb.iofv Insecure Permissions

Trojan.Win32.Agentb.iofv malware suffers from an insecure permissions vulnerability.

MD5 | f1d4908479b404b3600bb16933d6ba56

Discovery / credits: Malvuln - (c) 2021
Original source:
Contact: [email protected]

Threat: Trojan.Win32.Agentb.iofv
Vulnerability: Insecure Permissions
Description: Agentb.iofv creates an insecure dir named "drivr" 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: d4ac133a9df0c627f899bb6039d04215
Vuln ID: MVID-2021-0172
Dropped files: hostloader.exe
Disclosure: 04/17/2021

C:\>cacls drivr
C:\drivr BUILTIN\Administrators:(OI)(CI)(ID)F
NT AUTHORITY\Authenticated Users:(ID)C
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C

C:\>dir /a drivr
Volume in drive C has no label.

Directory of C:\drivr

06/14/2012 06:21 PM 293,376 hostloader.exe
1 File(s) 293,376 bytes

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