File and Directory Discovery
editFile and Directory Discovery
editEnumeration of files and directories using built-in tools. Adversaries may use the information discovered to plan follow-on activity.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- winlogbeat-*
- logs-windows.*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Discovery
Version: 4 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 8.2.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positives
editEnumeration of files and directories may not be inherently malicious and noise may come from scripts, automation tools, or normal command line usage. It’s important to baseline your environment to determine the amount of expected noise and exclude any known FP’s from the rule.
Rule query
editsequence by agent.id, user.name with maxspan=1m [process where
event.type in ("start", "process_started") and ((process.name :
"cmd.exe" or process.pe.original_file_name == "Cmd.Exe") and
process.args : "dir") or process.name : "tree.com"] [process where
event.type in ("start", "process_started") and ((process.name :
"cmd.exe" or process.pe.original_file_name == "Cmd.Exe") and
process.args : "dir") or process.name : "tree.com"] [process where
event.type in ("start", "process_started") and ((process.name :
"cmd.exe" or process.pe.original_file_name == "Cmd.Exe") and
process.args : "dir") or process.name : "tree.com"]
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
-
Technique:
- Name: File and Directory Discovery
- ID: T1083
- Reference URL: https://attack.mitre.org/techniques/T1083/
Rule version history
edit- Version 4 (8.2.0 release)
-
- Formatting only
- Version 3 (7.12.0 release)
-
-
Updated query, changed from:
process where event.type in ("start", "process_started") and (process.name : "cmd.exe" or process.pe.original_file_name == "Cmd.Exe") and process.args : ("dir", "tree")
-
- Version 2 (7.11.2 release)
-
-
Updated query, changed from:
process where event.type in ("start", "process_started") and (process.name : "cmd.exe" or process.pe.original_file_name == "Cmd.Exe") and process.args : ("dir", "tree")
-