From 4948582d7c415fcb45fa074c7c594a266d86156e Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Tue, 22 Sep 2020 14:37:40 +0200
Subject: [PATCH] [New Rule] Mimikatz Memssp Logs File Detected (#228)

* [New Rule] Mimikatz Memssp Logs File Detected

* Update rules/windows/credential_access_mimikatz_memssp_default_logs.toml

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>

* Update rules/windows/credential_access_mimikatz_memssp_default_logs.toml

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
---
 ...l_access_mimikatz_memssp_default_logs.toml | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 rules/windows/credential_access_mimikatz_memssp_default_logs.toml

diff --git a/rules/windows/credential_access_mimikatz_memssp_default_logs.toml b/rules/windows/credential_access_mimikatz_memssp_default_logs.toml
new file mode 100644
index 000000000..3060d832b
--- /dev/null
+++ b/rules/windows/credential_access_mimikatz_memssp_default_logs.toml
@@ -0,0 +1,36 @@
+[metadata]
+creation_date = "2020/08/31"
+ecs_version = ["1.6.0"]
+maturity = "production"
+updated_date = "2020/08/31"
+
+[rule]
+author = ["Elastic"]
+description = "Identifies the password log file from the default Mimikatz memssp module."
+index = ["winlogbeat-*", "logs-endpoint.events.*"]
+language = "kuery"
+license = "Elastic License"
+name = "Mimikatz Memssp Log File Detected"
+risk_score = 73
+rule_id = "ebb200e8-adf0-43f8-a0bb-4ee5b5d852c6"
+severity = "high"
+tags = ["Elastic", "Windows"]
+type = "query"
+
+query = '''
+event.category:file and file.name:mimilsa.log and process.name:lsass.exe
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1003"
+name = "Credential Dumping"
+reference = "https://attack.mitre.org/techniques/T1003/"
+
+
+[rule.threat.tactic]
+id = "TA0006"
+name = "Credential Access"
+reference = "https://attack.mitre.org/tactics/TA0006/"