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Trojan.Win32.Siscos.bqe Insecure Permissions

Trojan.Win32.Siscos.bqe Insecure Permissions
Posted May 6, 2021
Authored by malvuln | Site malvuln.com

Trojan.Win32.Siscos.bqe malware suffers from an insecure permissions vulnerability.

tags | exploit, trojan
systems | windows
MD5 | 99147a09a2d33a7571b024624c021f43

Trojan.Win32.Siscos.bqe Insecure Permissions

Change Mirror Download
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/b4a35ae6dcceea6390769829b4e1506f.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan.Win32.Siscos.bqe
Vulnerability: Insecure Permissions
Description: The malware creates a insecure dir named "Windupdt" 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: b4a35ae6dcceea6390769829b4e1506f
Vuln ID: MVID-2021-0199
Dropped files: OCX33.exe
Disclosure: 05/04/2021

Exploit/PoC:
C:\>cacls Windupdt
C:\Windupdt 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 Windupdt
Volume in drive C has no label.

Directory of C:\Windupdt

06/15/2012 12:03 AM 364,859 OCX33.exe
1 File(s) 364,859 bytes


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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