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Detectionhightest

HackTool - SharpEvtMute Execution

Detects the use of SharpEvtHook, a tool that tampers with the Windows event logs

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Launch
Florian Roth (Nextron Systems)Created Wed Sep 07Updated Tue Feb 14bedfc8ad-d1c7-4e37-a20e-e2b0dbee759cwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic
Detection Logic1 selector
detection:
    selection:
        - Image|endswith: '\SharpEvtMute.exe'
        - Description: 'SharpEvtMute'
        - CommandLine|contains:
              - '--Filter "rule '
              - '--Encoded --Filter \"'
    condition: selection
False Positives
Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References
1
Resolving title…
github.com
MITRE ATT&CK
Related Rules
SimilarDetectionhigh

HackTool - SharpEvtMute DLL Load

Detects the load of EvtMuteHook.dll, a key component of SharpEvtHook, a tool that tampers with the Windows event logs

Detects similar activity. Both rules may fire on overlapping events.

Rule Metadata
Rule ID
bedfc8ad-d1c7-4e37-a20e-e2b0dbee759c
Status
test
Level
high
Type
Detection
Created
Wed Sep 07
Modified
Tue Feb 14
Author
Florian Roth (Nextron Systems)
Path
rules/windows/process_creation/proc_creation_win_hktl_sharpevtmute.yml
Raw Tags
attack.defense-evasionattack.t1562.002
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