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Trojan-Downloader.Win32.Small.ahlq / Insecure Permissions

CVE Category Price Severity
N/A CWE-94 Not listed High
Author Risk Exploitation Type Date
Unknown High Local 2022-04-27
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2022040106

Below is a copy:

Trojan-Downloader.Win32.Small.ahlq / Insecure Permissions
Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/d859ba54086fd0313dc34b73b5b1eccb.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Trojan-Downloader.Win32.Small.ahlq
Vulnerability: Insecure Permissions 
Description: the malware creates a directory with insecure permissions under 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: Small
Type: PE32
MD5: d859ba54086fd0313dc34b73b5b1eccb
Vuln ID: MVID-2022-0567
Disclosure: 04/26/2022


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

 Directory of C:\Temp

04/14/2022  04:03 AM           761,344 vjrgq12Server_Setup.exe
               1 File(s)        761,344 bytes


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