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[Rule Tuning] Remote File Creation in World Writeable Directory #5304

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[Rule Tuning] Remote File Creation in World Writeable Directory #5304

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[Rule Tuning] Remote File Creation in World Writeable Directory
Aegrah Nov 12, 2025
42f5eb3
Update lateral_movement_remote_file_creation_world_writeable_dir.toml
Aegrah Nov 12, 2025
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21 changes: 15 additions & 6 deletions rules/linux/lateral_movement_remote_file_creation_world_writeable_dir.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
creation_date = "2025/02/20"
integration = ["endpoint"]
maturity = "production"
updated_date = "2025/04/07"
updated_date = "2025/11/12"

[rule]
author = ["Elastic"]
Expand All @@ -13,7 +13,7 @@ be an indicator of an attacker attempting to move laterally within a network.
"""
from = "now-9m"
index = ["logs-endpoint.events.file*", "auditbeat-*"]
language = "eql"
language = "kuery"
license = "Elastic License v2"
name = "Remote File Creation in World Writeable Directory"
note = """ ## Triage and analysis
Expand Down Expand Up @@ -101,11 +101,12 @@ tags = [
"Resources: Investigation Guide",
]
timestamp_override = "event.ingested"
type = "eql"
type = "new_terms"
query = '''
file where host.os.type == "linux" and event.action == "creation" and
process.name in ("scp", "sshd", "ssh", "ftp", "sftp", "vsftpd", "sftp-server", "rsync") and
file.path like~ ("/tmp*", "/var/tmp*", "/dev/shm/*", "/home/.*") and user.id != "0"
event.category:file and host.os.type:linux and event.action:creation and
process.name:(ftp or rsync or scp or sftp or sftp-server or ssh or sshd or vsftpd) and
file.path:((/dev/shm/* or /tmp* or /var/tmp*) and not (/tmp/ansible-tmp-* or /var/tmp/ansible-tmp-*)) and
not user.id:0
'''

[[rule.threat]]
Expand All @@ -130,3 +131,11 @@ reference = "https://attack.mitre.org/techniques/T1570/"
id = "TA0008"
name = "Lateral Movement"
reference = "https://attack.mitre.org/tactics/TA0008/"

[rule.new_terms]
field = "new_terms_fields"
value = ["process.executable", "host.id"]

[[rule.new_terms.history_window_start]]
field = "history_window_start"
value = "now-7d"
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