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Backdoor.Win32.Jokerdoor Insecure Permissions

Backdoor.Win32.Jokerdoor Insecure Permissions
Posted Jan 25, 2021
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Jokerdoor malware suffers from an insecure permissions vulnerability.

tags | exploit
systems | windows
MD5 | 97d09d3f08ee1102c8538c08bc78ea63

Backdoor.Win32.Jokerdoor Insecure Permissions

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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/6c7b364dafe0560dfb15c9b03f1b44bd.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Jokerdoor (TDC Mail Spy 1.0)
Vulnerability: Insecure Permissions
Description: This backdoor creates a dir under C: with change permissions granted to authenticated users group.
Type: PE32
MD5: 6c7b364dafe0560dfb15c9b03f1b44bd
Vuln ID: MVID-2021-0048
Dropped files: Spy.exe
Disclosure: 01/23/2021


Exploit/PoC:
C:\AccessChk>cacls C:\MailSpy
C:\MailSpy 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


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).
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