Detectionhightest
Sysmon Discovery Via Default Driver Altitude Using Findstr.EXE
Detects usage of "findstr" with the argument "385201". Which could indicate potential discovery of an installed Sysinternals Sysmon service using the default driver altitude (even if the name is changed).
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Launch
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 Logic2 selectors
detection:
selection_img:
- Image|endswith:
- '\find.exe'
- '\findstr.exe'
- OriginalFileName:
- 'FIND.EXE'
- 'FINDSTR.EXE'
selection_cli:
CommandLine|contains: ' 385201' # Sysmon driver default altitude
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
37db85d1-b089-490a-a59a-c7b6f984f480
Status
test
Level
high
Type
Detection
Created
Thu Dec 16
Modified
Tue Nov 14
Author
Path
rules/windows/process_creation/proc_creation_win_findstr_sysmon_discovery_via_default_altitude.yml
Raw Tags
attack.discoveryattack.t1518.001