Detection rules › Sigma
VMMap Signed Dbghelp.DLL Potential Sideloading
Detects potential DLL sideloading of a signed dbghelp.dll by the Sysinternals VMMap.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | |
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 7: Image loaded |
Rule body
title: VMMap Signed Dbghelp.DLL Potential Sideloading
id: 98ffaed4-aec2-4e04-9b07-31492fe68b3d
related:
- id: 273a8dd8-3742-4302-bcc7-7df5a80fe425
type: similar
status: test
description: Detects potential DLL sideloading of a signed dbghelp.dll by the Sysinternals VMMap.
references:
- https://techcommunity.microsoft.com/t5/sysinternals-blog/zoomit-v7-1-procdump-2-0-for-linux-process-explorer-v17-05/ba-p/3884766
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-09-05
tags:
- attack.persistence
- attack.privilege-escalation
- attack.execution
- attack.stealth
- attack.t1574.001
logsource:
category: image_load
product: windows
detection:
selection:
ImageLoaded|contains: 'C:\Debuggers\dbghelp.dll'
Image|endswith:
- '\vmmap.exe'
- '\vmmap64.exe'
Signed: 'true'
condition: selection
falsepositives:
- Unknown
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
ImageLoaded|contains: 'C:\Debuggers\dbghelp.dll'
Image|endswith:
- '\vmmap.exe'
- '\vmmap64.exe'
Signed: 'true'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with |
ImageLoaded | match |
| field:"ImageLoaded" kind:match value:"C:\Debuggers\dbghelp.dll" |
Signed | eq |
| field:"Signed" kind:eq value:"true" |