Detectionmediumtest
Findstr Launching .lnk File
Detects usage of findstr to identify and execute a lnk file as seen within the HHS redirect attack
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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|endswith:
- '.lnk'
- '.lnk"'
- ".lnk'"
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
33339be3-148b-4e16-af56-ad16ec6c7e7b
Status
test
Level
medium
Type
Detection
Created
Fri May 01
Modified
Mon Jan 15
Author
Path
rules/windows/process_creation/proc_creation_win_findstr_lnk.yml
Raw Tags
attack.defense-evasionattack.t1036attack.t1202attack.t1027.003