Trojan.Win32.Agent.xdtv / Insecure Permissions

[malvuln <malvuln13 () gmail com>]

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/ffa9b76f9549a2c46415c855a0911e8a.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

Threat: Trojan.Win32.Agent.xdtv
Vulnerability: Insecure Permissions
Description: The malware creates an insecure installation dir under
"C:\Program Files (x86)" and grants full (F) permissions to the Everyone
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: ffa9b76f9549a2c46415c855a0911e8a
Vuln ID: MVID-2021-0198
Disclosure: 05/04/2021

Exploit/PoC:
C:\>cacls "C:\Program Files (x86)\Cannonnt"
C:\Program Files (x86)\Cannonnt Everyone:(OI)(CI)F

C:\>cd "\Program Files (x86)\Cannonnt"

C:\Program Files (x86)\Cannonnt>dir
 Volume in drive C has no label.

 Directory of C:\Program Files (x86)\Cannonnt

05/10/2012  05:04 PM            53,248 messenger.exe
05/10/2012  05:04 PM           122,880 rdbms.exe
05/10/2012  05:04 PM           196,608 RDS.exe
05/10/2012  05:04 PM           233,472 windns.exe
               4 File(s)        606,208 bytes

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