From e7695f862f61a45486c3600a7ec0df6715a7f8c0 Mon Sep 17 00:00:00 2001
From: Samirbous <64742097+Samirbous@users.noreply.github.com>
Date: Tue, 8 Dec 2020 17:56:25 +0100
Subject: [PATCH] [New Rule] Potential Credential Access with LolBas (#620)

* [New Rule] Potential Credential Access with LolBas

* typo

* added procdump and steam lolbins

* added cisco Jabber lobas

* eql syntax

* ecs_version

* Update rules/windows/credential_access_lolbas_dump_cmdline.toml

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

* Update rules/windows/credential_access_lolbas_dump_cmdline.toml

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

* renamed rule and filename as suggested by DanStep

* adjust name and desc

Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
---
 .../credential_access_cmdline_dump_tool.toml  | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 rules/windows/credential_access_cmdline_dump_tool.toml

diff --git a/rules/windows/credential_access_cmdline_dump_tool.toml b/rules/windows/credential_access_cmdline_dump_tool.toml
new file mode 100644
index 000000000..ebcbf7b46
--- /dev/null
+++ b/rules/windows/credential_access_cmdline_dump_tool.toml
@@ -0,0 +1,50 @@
+[metadata]
+creation_date = "2020/11/24"
+maturity = "production"
+updated_date = "2020/11/24"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies the execution of known Windows utilities often abused to dump LSASS memory or the Active Directory
+database (NTDS.dit) in preparation for credential access.
+"""
+from = "now-9m"
+index = ["winlogbeat-*", "logs-endpoint.events.*"]
+language = "eql"
+license = "Elastic License"
+name = "Potential Credential Access via Windows Utilities"
+references = ["https://lolbas-project.github.io/"]
+risk_score = 73
+rule_id = "00140285-b827-4aee-aa09-8113f58a08f3"
+severity = "high"
+tags = ["Elastic", "Host", "Windows", "Threat Detection", "Credential Access"]
+type = "eql"
+
+query = '''
+process where event.type in ("start", "process_started") and
+/* update here with any new lolbas with dump capability */
+(process.pe.original_file_name == "procdump" and process.args : "-ma") or
+(process.name : "ProcessDump.exe" and not process.parent.executable : "C:\\Program Files*\\Cisco Systems\\*.exe") or
+(process.pe.original_file_name == "WriteMiniDump.exe" and not process.parent.executable : "C:\\Program Files*\\Steam\\*.exe") or
+(process.pe.original_file_name == "RUNDLL32.EXE" and (process.args : "MiniDump*" or process.command_line : "*comsvcs.dll*#24*")) or
+(process.pe.original_file_name == "RdrLeakDiag.exe" and process.args : "/fullmemdmp") or
+(process.pe.original_file_name == "SqlDumper.exe" and process.args : "0x01100*") or
+(process.pe.original_file_name == "TTTracer.exe" and process.args : "-dumpFull" and process.args : "-attach") or
+(process.pe.original_file_name == "ntdsutil.exe" and process.args : "create*full*") or
+(process.pe.original_file_name == "diskshadow.exe" and process.args : "/s")
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1003"
+name = "OS Credential Dumping"
+reference = "https://attack.mitre.org/techniques/T1003/"
+
+
+[rule.threat.tactic]
+id = "TA0006"
+name = "Credential Access"
+reference = "https://attack.mitre.org/tactics/TA0006/"