VMMap Unsigned Dbghelp.DLL Potential Sideloading

Detects potential DLL sideloading of an unsigned dbghelp.dll by the Sysinternals VMMap.

Sigma rule (View on GitHub)

 1title: VMMap Unsigned Dbghelp.DLL Potential Sideloading
 2id: 273a8dd8-3742-4302-bcc7-7df5a80fe425
 3related:
 4    - id: 98ffaed4-aec2-4e04-9b07-31492fe68b3d
 5      type: similar
 6status: test
 7description: Detects potential DLL sideloading of an unsigned dbghelp.dll by the Sysinternals VMMap.
 8references:
 9    - https://techcommunity.microsoft.com/t5/sysinternals-blog/zoomit-v7-1-procdump-2-0-for-linux-process-explorer-v17-05/ba-p/3884766
10author: Nasreddine Bencherchali (Nextron Systems)
11date: 2023/07/28
12modified: 2023/09/05
13tags:
14    - attack.defense_evasion
15    - attack.persistence
16    - attack.privilege_escalation
17    - attack.t1574.001
18    - attack.t1574.002
19logsource:
20    category: image_load
21    product: windows
22detection:
23    selection:
24        ImageLoaded|contains: 'C:\Debuggers\dbghelp.dll'
25        Image|endswith:
26            - '\vmmap.exe'
27            - '\vmmap64.exe'
28    filter_main_signed:
29        Signed: 'true'
30    condition: selection and not 1 of filter_main_*
31falsepositives:
32    - Unknown
33level: high

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