Trojan.Win32.Siscos.bqe malware suffers from an insecure permissions vulnerability.
99147a09a2d33a7571b024624c021f43Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/b4a35ae6dcceea6390769829b4e1506f.txt
Contact: [email protected]
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
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