VBScript Payload Stored in Registry

 1title: VBScript Payload Stored in Registry
 2id: 46490193-1b22-4c29-bdd6-5bf63907216f
 3status: test
 4description: Detects VBScript content stored into registry keys as seen being used by UNC2452 group
 5references:
 6    - https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/
 7author: Florian Roth (Nextron Systems)
 8date: 2021-03-05
 9modified: 2023-08-17
10tags:
11    - attack.privilege-escalation
12    - attack.persistence
13    - attack.t1547.001
14logsource:
15    category: registry_set
16    product: windows
17detection:
18    selection:
19        TargetObject|contains: 'Software\Microsoft\Windows\CurrentVersion'
20        Details|contains:
21            - 'vbscript:'
22            - 'jscript:'
23            - 'mshtml,'
24            - 'RunHTMLApplication'
25            - 'Execute('
26            - 'CreateObject'
27            - 'window.close'
28    filter:
29        TargetObject|contains: 'Software\Microsoft\Windows\CurrentVersion\Run'
30    filter_dotnet:
31        Image|endswith: '\msiexec.exe'
32        TargetObject|contains: '\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\'
33        Details|contains:
34            - '\Microsoft.NET\Primary Interop Assemblies\Microsoft.mshtml.dll'
35            - '<\Microsoft.mshtml,fileVersion='
36            - '_mshtml_dll_'
37            - '<\Microsoft.mshtml,culture='
38    condition: selection and not 1 of filter*
39falsepositives:
40    - Unknown
41level: high