Parent Process PID Spoofingedit
Identifies parent process spoofing used to thwart detection. Adversaries may spoof the parent process identifier (PPID) of a new process to evade process-monitoring defenses or to elevate privileges.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Defense Evasion
- Tactic: Privilege Escalation
- Data Source: Elastic Defend
Version: 105
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
/* This rule is compatible with Elastic Endpoint only */
sequence by host.id, user.id with maxspan=3m
[process where host.os.type == "windows" and event.type == "start" and
process.Ext.token.integrity_level_name != "system" and
(
process.pe.original_file_name : ("winword.exe", "excel.exe", "outlook.exe", "powerpnt.exe", "eqnedt32.exe",
"fltldr.exe", "mspub.exe", "msaccess.exe", "powershell.exe", "pwsh.exe",
"cscript.exe", "wscript.exe", "rundll32.exe", "regsvr32.exe", "msbuild.exe",
"mshta.exe", "wmic.exe", "cmstp.exe", "msxsl.exe") or
(process.executable : ("?:\\Users\\*.exe",
"?:\\ProgramData\\*.exe",
"?:\\Windows\\Temp\\*.exe",
"?:\\Windows\\Tasks\\*") and
(process.code_signature.exists == false or process.code_signature.status : "errorBadDigest")) or
process.executable : "?:\\Windows\\Microsoft.NET\\*.exe"
) and
not process.executable :
("?:\\Windows\\System32\\WerFaultSecure.exe",
"?:\\WINDOWS\\SysWOW64\\WerFaultSecure.exe",
"?:\\Windows\\System32\\WerFault.exe",
"?:\\Windows\\SysWOW64\\WerFault.exe")
] by process.pid
[process where host.os.type == "windows" and event.type == "start" and
process.parent.Ext.real.pid > 0 and
/* process.parent.Ext.real.pid is only populated if the parent process pid doesn't match */
not (process.name : "msedge.exe" and process.parent.name : "sihost.exe") and
not process.executable :
("?:\\Windows\\System32\\WerFaultSecure.exe",
"?:\\WINDOWS\\SysWOW64\\WerFaultSecure.exe",
"?:\\Windows\\System32\\WerFault.exe",
"?:\\Windows\\SysWOW64\\WerFault.exe")
] by process.parent.Ext.real.pid
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Access Token Manipulation
- ID: T1134
- Reference URL: https://attack.mitre.org/techniques/T1134/
-
Sub-technique:
- Name: Parent PID Spoofing
- ID: T1134.004
- Reference URL: https://attack.mitre.org/techniques/T1134/004/
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Access Token Manipulation
- ID: T1134
- Reference URL: https://attack.mitre.org/techniques/T1134/
-
Sub-technique:
- Name: Parent PID Spoofing
- ID: T1134.004
- Reference URL: https://attack.mitre.org/techniques/T1134/004/