Discovery / credits: Malvuln - (c) 2021  
Original source:  
Threat: Trojan-Spy.Win32.SpyEyes.elr  
Vulnerability: Insecure Permissions   
Description: The malware creates an insecure hidden dir named "40404504504" under c:\ drive, granting change (C) permissions to the authenticated user group. Standard users can rename the malware and reboot to disable it or replace with their own executable to escalate privileges when a privileged user logs on to the infected machine.  
Type: PE32  
MD5: 025d07f4610605031e501e6745d663aa  
Vuln ID: MVID-2021-0112  
Dropped files: 40404504504.exe, config.bin  
Disclosure: 02/25/2021  
#include "stdio.h"  
#include "windows.h"  
void main(void){  
system("attrib -h C:\\40404504504\\40404504504.exe");  
system("RENAME C:\\40404504504\\40404504504.exe 13");  
puts("[+] Disabled by renaming C:\\40404504504\\40404504504.exe to 13 ...\n");  
puts("[+] Trojan-Spy.Win32.SpyEyes.elr PWNED!");  
puts("[+] MD5: 025d07f4610605031e501e6745d663aa");  
puts("[+] By Malvuln");  
C:\>cacls \40404504504  
C:\40404504504 BUILTIN\Administrators:(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:\40404504504  
02/10/2018 12:21 AM 111,616 40404504504.exe  
02/25/2021 10:19 PM 8,056 config.bin  
2 File(s) 119,672 bytes  
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