Trojan-Spy.Win32.Ardamax.ocx malware suffers from an insecure permissions vulnerability.
1958fc9f88dc93972c6926deb4aa378bDiscovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/78a39875a0adb110cf3c7de3a0d1384c.txt
Contact: [email protected]
Media: twitter.com/malvuln
Threat: Trojan-Spy.Win32.Ardamax.ocx
Vulnerability: Insecure Permissions
Description: The malware creates an dir named "MUWOCI" or "28463" with insecure permissions under Windows\SysWOW64 granting full (F) permissions to the Everyone 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.
Type: PE32
MD5: 78a39875a0adb110cf3c7de3a0d1384c
Vuln ID: MVID-2021-0362
Disclosure: 10/15/2021
Exploit/PoC:
C:\Windows\SysWOW64\MUWOCI>cacls HNI.001
C:\Windows\SysWOW64\MUWOCI\HNI.001 Everyone:(ID)F
C:\Windows\SysWOW64\MUWOCI>cd ..
C:\Windows\SysWOW64>cacls MUWOCI
C:\Windows\SysWOW64\MUWOCI Everyone:F
Everyone:(OI)(CI)(IO)F
C:\Windows\SysWOW64>dir MUWOCI
Volume in drive C has no label.
Directory of C:\Windows\SysWOW64\MUWOCI
10/05/2021 10:11 PM 62,464 HNI.001
1 File(s) 62,464 bytes
C:\Windows\SysWOW64>cacls 28463
C:\Windows\SysWOW64\28463 Everyone:F
Everyone:(OI)(CI)(IO)F
C:\Windows\SysWOW64>dir 28463
Volume in drive C has no label.
Directory of C:\Windows\SysWOW64\28463
10/05/2021 10:17 PM 402,944 AKV.exe
10/05/2021 10:17 PM 482 DQOC.001
10/05/2021 10:17 PM 7,680 DQOC.006
10/05/2021 10:17 PM 5,632 DQOC.007
10/05/2021 10:17 PM 483,840 DQOC.exe
5 File(s) 900,578 bytes
C:\Windows\SysWOW64>cacls 28463
C:\Windows\SysWOW64\28463 Everyone:F
Everyone:(OI)(CI)(IO)F
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