Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/aff493ed1f98ed05c360b462192d2853.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan.Win32.Hotkeychick.d
Vulnerability: Insecure Permissions
Description: creates an insecure dir named "Sniperscan" 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: aff493ed1f98ed05c360b462192d2853
Vuln ID: MVID-2021-0163
Disclosure: 04/07/2021

Exploit/PoC:
C:\>cacls Sniperscan
C:\Sniperscan BUILTIN\Administrators:(OI)(CI)(ID)F
              NT AUTHORITY\SYSTEM:(OI)(CI)(ID)F
              BUILTIN\Users:(OI)(CI)(ID)R
              NT AUTHORITY\Authenticated Users:(ID)C
              NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C


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

 Directory of C:\Sniperscan

01/14/2019  02:00 PM             3,020 CHANGELOG.txt
03/10/2018  11:53 PM           118,784 clamd.exe
03/10/2018  11:53 PM            77,824 clamdscan.exe
04/07/2021  04:52 PM    <DIR>          conf
04/07/2021  04:52 PM    <DIR>          COPYING
04/07/2021  04:52 PM    <DIR>          database
03/10/2018  11:54 PM           131,072 freshclam.exe
04/07/2021  04:52 PM    <DIR>          ico
03/10/2018  11:53 PM         3,313,664 libclamav.dll
03/10/2018  11:47 PM            65,536 libclamunrar.dll
03/10/2018  11:53 PM            25,600 libclamunrar_iface.dll
01/02/2016  08:32 AM         1,179,648 libeay32.dll
11/09/2018  04:34 PM             1,644 LICENSE.txt
01/02/2016  08:32 AM             1,870 Microsoft.VC80.CRT.manifest
01/02/2016  08:32 AM           479,232 msvcm80.dll
01/02/2016  08:32 AM           554,832 msvcp80.dll
01/02/2016  08:32 AM           632,656 msvcr80.dll
04/07/2021  04:52 PM    <DIR>          quarantine
11/14/2018  07:17 PM               382 question.png
04/07/2021  04:52 PM               445 sigupdate.log
03/10/2018  11:53 PM            77,824 snipedscan.exe
01/25/2019  05:39 PM         1,309,184 sniperscan.exe
04/07/2021  04:52 PM               329 sniperscan.log
01/02/2016  08:32 AM               125 sniperscan.reg
01/25/2019  05:38 PM           218,809 sniperscanengine.exe
04/07/2021  04:52 PM               216 sniperscanengine.log
09/14/2017  06:26 AM           219,563 sniperscanregistrationen.exe
04/07/2021  04:52 PM    <DIR>          temp
02/21/2016  07:50 AM               236 TODOS.txt
04/07/2021  04:52 PM            36,977 uninstall.exe
04/07/2021  04:52 PM    <DIR>          update
04/30/2018  07:34 AM           928,768 updater_en.exe
04/07/2021  04:52 PM    <DIR>          version
01/13/2019  10:18 AM                 4 VERSION.txt


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