IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential DLL SideLoading via Trusted Microsoft Programs
editPotential DLL SideLoading via Trusted Microsoft Programs
editIdentifies an instance of a Windows trusted program that is known to be vulnerable to DLL Search Order Hijacking starting after being renamed or from a non-standard path. This is uncommon behavior and may indicate an attempt to evade defenses via side loading a malicious DLL within the memory space of one of those processes.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
- endgame-*
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: None
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Defense Evasion
- Data Source: Elastic Endgame
Version: 104
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
editRule query
editprocess where host.os.type == "windows" and event.type == "start" and
process.pe.original_file_name in ("WinWord.exe", "EXPLORER.EXE", "w3wp.exe", "DISM.EXE") and
not (process.name : ("winword.exe", "explorer.exe", "w3wp.exe", "Dism.exe") or
process.executable : ("?:\\Windows\\explorer.exe",
"?:\\Program Files\\Microsoft Office\\root\\Office*\\WINWORD.EXE",
"?:\\Program Files?(x86)\\Microsoft Office\\root\\Office*\\WINWORD.EXE",
"?:\\Windows\\System32\\Dism.exe",
"?:\\Windows\\SysWOW64\\Dism.exe",
"?:\\Windows\\System32\\inetsrv\\w3wp.exe")
)
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Masquerading
- ID: T1036
- Reference URL: https://attack.mitre.org/techniques/T1036/