exploit the possibilities

Trojan.Win32.Pincav.cmfl Insecure Permissions

Trojan.Win32.Pincav.cmfl Insecure Permissions
Posted Feb 22, 2021
Authored by malvuln | Site malvuln.com

Trojan.Win32.Pincav.cmfl malware suffers from an insecure permissions vulnerability.

tags | exploit, trojan
systems | windows
MD5 | b237580a2e1707ad533440f0bedecdcc

Trojan.Win32.Pincav.cmfl Insecure Permissions

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/9d296ebd6b4f79457fcc61e38dcce61e.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan.Win32.Pincav.cmfl
Vulnerability: Insecure Permissions
Description: The trojan creates an insecure dir named "Windupdt" under c:\ drive, granting change (C) permissions to authenticated users group. Standard users can rename the malware and reboot to disable it or replace it with their own executable to escalate privileges when a privileged user logs on. The malware also creates registry key under HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run for persistence. To successfully rename the malware we have to call Windows "attrib -h" command to unhide the executable or the rename will fail.
Type: PE32
MD5: 9d296ebd6b4f79457fcc61e38dcce61e
Vuln ID: MVID-2021-0104
Dropped files: winupdate.exe
Disclosure: 02/21/2021

#include "stdio.h"
#include "windows.h"

void main(void){

system("attrib -h C:\\Windupdt\\winupdate.exe");
puts("Unhiding the malware to rename it...");
system("RENAME C:\\Windupdt\\winupdate.exe 13");

puts("[+] Disabled persistence by renaming winupdate.exe to 13 ...\n");
puts("Restart your computer ...");

puts("[+] Trojan.Win32.Pincav.cmfl PWNED!\n");
puts("[+] MD5: 9d296ebd6b4f79457fcc61e38dcce61e\n");
puts("[+] By Malvuln\n");


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

C:\>dir /a \Windupdt
Volume in drive C has no label.

Directory of C:\Windupdt

06/14/2012 11:46 PM 707,094 winupdate.exe
1 File(s) 707,094 bytes
2 Dir(s) 49,773,490,176 bytes free

Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).
Login or Register to add favorites

File Archive:

March 2021

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    19 Files
  • 2
    Mar 2nd
    15 Files
  • 3
    Mar 3rd
    30 Files
  • 4
    Mar 4th
    13 Files
  • 5
    Mar 5th
    10 Files
  • 6
    Mar 6th
    1 Files
  • 7
    Mar 7th
    2 Files
  • 8
    Mar 8th
    19 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    0 Files
  • 12
    Mar 12th
    0 Files
  • 13
    Mar 13th
    0 Files
  • 14
    Mar 14th
    0 Files
  • 15
    Mar 15th
    0 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    0 Files
  • 19
    Mar 19th
    0 Files
  • 20
    Mar 20th
    0 Files
  • 21
    Mar 21st
    0 Files
  • 22
    Mar 22nd
    0 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    0 Files
  • 26
    Mar 26th
    0 Files
  • 27
    Mar 27th
    0 Files
  • 28
    Mar 28th
    0 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags


packet storm

© 2020 Packet Storm. All rights reserved.

Security Services
Hosting By