VMMap Signed Dbghelp.DLL Potential Sideloading

calendar Sep 7, 2023 · attack.defense_evasion attack.persistence attack.privilege_escalation attack.t1574.001 attack.t1574.002  ·
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Detects potential DLL sideloading of a signed dbghelp.dll by the Sysinternals VMMap.

Sigma rule (View on GitHub)

 1title: VMMap Signed Dbghelp.DLL Potential Sideloading
 2id: 98ffaed4-aec2-4e04-9b07-31492fe68b3d
 3related:
 4    - id: 273a8dd8-3742-4302-bcc7-7df5a80fe425
 5      type: similar
 6status: experimental
 7description: Detects potential DLL sideloading of a signed 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: 2023/09/05
12tags:
13    - attack.defense_evasion
14    - attack.persistence
15    - attack.privilege_escalation
16    - attack.t1574.001
17    - attack.t1574.002
18logsource:
19    category: image_load
20    product: windows
21detection:
22    selection:
23        ImageLoaded|contains: 'C:\Debuggers\dbghelp.dll'
24        Image|endswith:
25            - '\vmmap.exe'
26            - '\vmmap64.exe'
27        Signed: 'true'
28    condition: selection
29falsepositives:
30    - Unknown
31level: medium

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