[New] Process Created with a Duplicated Token (#3152)

* [New] Process Created with a Duplicated Token

using `process.Ext.effective_parent.executable` to detect impersonation using token duplicates from windows native binaries to run common lolbins or recently dropped unsigned ones :

* Update privilege_escalation_create_process_with_token_unpriv.toml

* Update privilege_escalation_create_process_with_token_unpriv.toml

* Update rules/windows/privilege_escalation_create_process_with_token_unpriv.toml

Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>

* Update privilege_escalation_create_process_with_token_unpriv.toml

---------

Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>

(cherry picked from commit 7488c60090)

rules/windows/privilege_escalation_create_process_with_token_unpriv.toml

@@ -0,0 +1,78 @@
+[metadata]
+creation_date = "2023/10/02"
+integration = ["endpoint"]
+maturity = "production"
+min_stack_comments = "New fields added: process.Ext.effective_parent.executable, process.Ext.effective_parent.name, process.Ext.relative_file_creation_time, process.Ext.relative_file_name_modify_time"
+min_stack_version = "8.4.0"
+updated_date = "2023/10/02"
+
+[rule]
+author = ["Elastic"]
+description = """
+Identifies the creation of a process impersonating the token of another user logon session. Adversaries may create a new
+process with a different token to escalate privileges and bypass access controls.
+"""
+from = "now-9m"
+index = ["logs-endpoint.events.*"]
+language = "eql"
+license = "Elastic License v2"
+name = "Process Created with a Duplicated Token"
+references = [
+    "https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createprocesswithtokenw",
+]
+risk_score = 47
+rule_id = "1b0b4818-5655-409b-9c73-341cac4bb73f"
+severity = "medium"
+tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Privilege Escalation", "Data Source: Elastic Defend"]
+timestamp_override = "event.ingested"
+type = "eql"
+
+query = '''
+/* This rule is only compatible with Elastic Endpoint 8.4+ */
+
+process where host.os.type == "windows" and event.action == "start" and
+
+ user.id : ("S-1-5-21-*", "S-1-12-1-*") and
+
+ (process.Ext.effective_parent.executable regex~ """[C-Z]:\\Windows\\(System32|SysWOW64)\\[a-zA-Z0-9\-\_\.]+\.exe""" or
+  process.Ext.effective_parent.executable : "?:\\Windows\\explorer.exe") and
+
+ (
+  process.name : ("powershell.exe", "cmd.exe", "rundll32.exe", "notepad.exe", "net.exe", "ntdsutil.exe",
+                  "tasklist.exe", "reg.exe", "certutil.exe", "bitsadmin.exe", "msbuild.exe", "esentutl.exe") or
+
+  ((process.Ext.relative_file_creation_time <= 900 or process.Ext.relative_file_name_modify_time <= 900) and
+   not process.code_signature.status : ("trusted", "errorExpired", "errorCode_endpoint*") and
+   not process.executable : ("?:\\Program Files\\*", "?:\\Program Files (x86)\\*"))
+ ) and
+ not (process.name : "rundll32.exe" and
+      process.command_line : ("*davclnt.dll,DavSetCookie*", "*?:\\Program Files*",
+                              "*\\Windows\\System32\\winethc.dll*", "*\\Windows\\SYSTEM32\\EDGEHTML.dll*",
+                              "*shell32.dll,SHCreateLocalServerRunDll*")) and
+ not startswith~(process.Ext.effective_parent.name, process.parent.name)
+'''
+
+
+[[rule.threat]]
+framework = "MITRE ATT&CK"
+[[rule.threat.technique]]
+id = "T1134"
+name = "Access Token Manipulation"
+reference = "https://attack.mitre.org/techniques/T1134/"
+
+[[rule.threat.technique.subtechnique]]
+id = "T1134.001"
+name = "Token Impersonation/Theft"
+reference = "https://attack.mitre.org/techniques/T1134/001/"
+
+[[rule.threat.technique.subtechnique]]
+id = "T1134.002"
+name = "Create Process with Token"
+reference = "https://attack.mitre.org/techniques/T1134/002/"
+
+
+
+[rule.threat.tactic]
+id = "TA0004"
+name = "Privilege Escalation"
+reference = "https://attack.mitre.org/tactics/TA0004/"