VBScript Payload Stored in Registry

Detects VBScript content stored into registry keys as seen being used by UNC2452 group

Sigma rule (View on GitHub)

 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.persistence
12    - attack.t1547.001
13logsource:
14    category: registry_set
15    product: windows
16detection:
17    selection:
18        TargetObject|contains: 'Software\Microsoft\Windows\CurrentVersion'
19        Details|contains:
20            - 'vbscript:'
21            - 'jscript:'
22            - 'mshtml,'
23            - 'RunHTMLApplication'
24            - 'Execute('
25            - 'CreateObject'
26            - 'window.close'
27    filter:
28        TargetObject|contains: 'Software\Microsoft\Windows\CurrentVersion\Run'
29    filter_dotnet:
30        Image|endswith: '\msiexec.exe'
31        TargetObject|contains: '\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\'
32        Details|contains:
33            - '\Microsoft.NET\Primary Interop Assemblies\Microsoft.mshtml.dll'
34            - '<\Microsoft.mshtml,fileVersion='
35            - '_mshtml_dll_'
36            - '<\Microsoft.mshtml,culture='
37    condition: selection and not 1 of filter*
38falsepositives:
39    - Unknown
40level: high

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