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Edit Report

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2022040084

Below is a copy:

Trojan.Win32.TScash.c / Insecure Permissions
Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/9d18d318e017b513b9c6cd193ccdc6ff.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Trojan.Win32.TScash.c
Vulnerability: Insecure Permissions
Description: The malware writes a PE file with insecure permissions to c drive granting change (C) permissions to the authenticated user group. Standard users can rename the executable 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. 
Family: TScash
Type: PE32
MD5: 9d18d318e017b513b9c6cd193ccdc6ff
Vuln ID: MVID-2022-0555
Dropped files: tscash.exe
Disclosure: 04/18/2022

Exploit/PoC:
C:\>cacls tscash.exe
C:\tscash.exe BUILTIN\Administrators:(ID)F
              NT AUTHORITY\SYSTEM:(ID)F
              BUILTIN\Users:(ID)R
              NT AUTHORITY\Authenticated Users:(ID)C

C:\>dir tscash.exe
 Volume in drive C has no label.

 Directory of C:\

02/18/2013  04:48 PM            49,664 tscash.exe
               1 File(s)         49,664 bytes

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