TROJAN-BANKER.WIN32.DELF.AC / Insecure Permissions

CVE Category Price Severity
N/A CWE-16 Not specified High
Author Risk Exploitation Type Date
Unknown High Remote 2021-03-16
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at:

Below is a copy:

TROJAN-BANKER.WIN32.DELF.AC / Insecure Permissions
Discovery / credits: Malvuln - (c) 2021
Original source:
Contact: [email protected]

Vulnerability: Insecure Permissions
Description: Banker creates an insecure dir named "BancoBrasil" under c:\ drive, granting change (C) permissions to the authenticated user group. Standard users can rename the malware to disable it or replace with their own executable. Then wait for a privileged user to logon to the infected machine to potentially escalate privileges.
Type: PE32
MD5: 81301fecc7d9ff6b28ac779d2f819673
Vuln ID: MVID-2021-0126
Dropped files: DDA.exe
Disclosure: 03/14/2021

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

 Volume in drive C has no label.

 Directory of C:\BancoBrasil

03/12/2021  08:08 PM    <DIR>          bb
               0 File(s)              0 bytes

C:\BancoBrasil>cd bb

 Volume in drive C has no label.

 Directory of C:\BancoBrasil\bb

03/12/2021  08:09 PM                 0 DDA.exe
03/12/2021  08:08 PM    <DIR>          loginpfe.bb_arquivos

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