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Newest: 1.3.3
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Active Rule
Suspicious Unsigned Dbghelp/Dbgcore DLL Loaded
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Conversion Output
Suspicious Unsigned Dbghelp/Dbgcore DLL Loaded
Using Splunk · Default · pySigma 1.3.3
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion1.3.3
title: Suspicious Unsigned Dbghelp/Dbgcore DLL Loaded
id: bdc64095-d59a-42a2-8588-71fd9c9d9abc
related:
- id: 0e277796-5f23-4e49-a490-483131d4f6e1 # Suspicious Loading
type: similar
status: test
description: |
Detects the load of dbghelp/dbgcore DLL (used to make memory dumps) by suspicious processes.
Tools like ProcessHacker and some attacker tradecract use MiniDumpWriteDump API found in dbghelp.dll or dbgcore.dll.
As an example, SilentTrynity C2 Framework has a module that leverages this API to dump the contents of Lsass.exe and transfer it over the network back to the attacker's machine.
references:
- https://learn.microsoft.com/en-us/windows/win32/api/minidumpapiset/nf-minidumpapiset-minidumpwritedump
- https://www.pinvoke.net/default.aspx/dbghelp/MiniDumpWriteDump.html
- https://medium.com/@fsx30/bypass-edrs-memory-protection-introduction-to-hooking-2efb21acffd6
author: Perez Diego (@darkquassar), oscd.community, Ecco
date: 2019-10-27
modified: 2022-12-09
tags:
- attack.credential-access
- attack.t1003.001
logsource:
category: image_load
product: windows
detection:
selection:
ImageLoaded|endswith:
- '\dbghelp.dll'
- '\dbgcore.dll'
Signed: 'false'
condition: selection
falsepositives:
- Unknown
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/image_load/image_load_dll_dbghelp_dbgcore_unsigned_load.yml