Trojan.Win32.Autoit.fhj MVID-2022-0637 Insecure Permissions

`Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022  
Original source: https://malvuln.com/advisory/d871836f77076eeed87eb0078c1911c7.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Trojan.Win32.Autoit.fhj  
Vulnerability: Insecure Permissions  
Description: The malware writes two hidden DLL files "vp8decoder.dll" and "vp8encoder.dll" to its installation directory granting full (F) permissions to the Everyone user group. Any user can replace the PE files 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.   
Family: Autoit  
Type: PE32  
MD5: d871836f77076eeed87eb0078c1911c7  
Vuln ID: MVID-2022-0637  
Disclosure: 09/06/2022  
  
Exploit/PoC:  
insecure dir permissions for two DLL's with bunch hidden files  
  
C:\Program Files (x86)\XPS Rasterization Service Component>attrib -s -h *  
C:\Program Files (x86)\XPS Rasterization Service Component>cacls *  
C:\Program Files (x86)\XPS Rasterization Service Component\vp8decoder.dll Everyone:F  
C:\Program Files (x86)\XPS Rasterization Service Component\vp8encoder.dll Everyone:F  
  
  
Directory of C:\Program Files (x86)\XPS Rasterization Service Component  
  
09/05/2022 12:18 AM 1,165 Log(05.09.2022).txt  
09/05/2022 12:15 AM 803,971 Screen(00_15).jpg  
02/21/2017 02:58 PM 2,665 settings.dat  
07/15/2015 12:19 PM 143,568 vp8decoder.dll  
07/15/2015 12:19 PM 539,856 vp8encoder.dll  
09/05/2022 12:15 AM 2,052,816 xps.exe  
02/21/2017 01:24 PM 2,031,104 xservice.exe  
7 File(s) 5,575,145 bytes  
  
  
  
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