From eb487f943394dfab6ed536b985029d2308a2dd83 Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Tue, 17 Nov 2020 23:29:47 +0100
Subject: [PATCH] [New Rule] Timestomping using Touch Command (#463)

* [New Rule] Timestomping using Touch Command

* Update defense_evasion_timestomp_touch.toml

* added macOS tag

* Update rules/linux/defense_evasion_timestomp_touch.toml

Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>

Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>
---
 .../defense_evasion_timestomp_touch.toml      | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 rules/linux/defense_evasion_timestomp_touch.toml

diff --git a/rules/linux/defense_evasion_timestomp_touch.toml b/rules/linux/defense_evasion_timestomp_touch.toml
new file mode 100644
index 000000000..a0a108381
--- /dev/null
+++ b/rules/linux/defense_evasion_timestomp_touch.toml
@@ -0,0 +1,43 @@
+[metadata]
+creation_date = "2020/11/03"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/11/03"
+
+[rule]
+author = ["Elastic"]
+description = """
+Timestomping is an anti-forensics technique which is used to modify the timestamps of a file, often to mimic files
+ that are in the same folder.
+"""
+from = "now-9m"
+index = ["auditbeat-*", "logs-endpoint.events.*"]
+language = "eql"
+license = "Elastic License"
+max_signals = 33
+name = "Timestomping using Touch Command"
+risk_score = 47
+rule_id = "b0046934-486e-462f-9487-0d4cf9e429c6"
+severity = "medium"
+tags = ["Elastic", "Host", "Linux", "macOS", "Threat Detection", "Defense Evasion"]
+type = "eql"
+
+query = '''
+process where event.type in ("start", "process_started") and
+ process.name == "touch" and wildcard(process.args, "-r", "-t", "-a*","-m*")
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1099"
+name = "Timestomp"
+reference = "https://attack.mitre.org/techniques/T1099/"
+
+
+[rule.threat.tactic]
+id = "TA0005"
+name = "Defense Evasion"
+reference = "https://attack.mitre.org/tactics/TA0005/"
+