mirror of
https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git
synced 2026-06-11 21:54:56 +03:00
mukul975
102 lines
3.3 KiB
Markdown
102 lines
3.3 KiB
Markdown
# PowerShell Empire Artifact Detection Reference
|
|
|
|
## Enable Script Block Logging (GPO)
|
|
|
|
```
|
|
Computer Configuration > Administrative Templates > Windows Components >
|
|
Windows PowerShell > Turn on PowerShell Script Block Logging: Enabled
|
|
```
|
|
|
|
Registry: `HKLM\SOFTWARE\Policies\Microsoft\Windows\PowerShell\ScriptBlockLogging`
|
|
- `EnableScriptBlockLogging` = 1
|
|
|
|
## Enable Module Logging (GPO)
|
|
|
|
```
|
|
Computer Configuration > Administrative Templates > Windows Components >
|
|
Windows PowerShell > Turn on Module Logging: Enabled
|
|
Module Names: *
|
|
```
|
|
|
|
## Key Event IDs
|
|
|
|
| Event ID | Log | Description |
|
|
|----------|-----|-------------|
|
|
| 4104 | Microsoft-Windows-PowerShell/Operational | Script Block Logging — captures executed script text |
|
|
| 4103 | Microsoft-Windows-PowerShell/Operational | Module Logging — captures pipeline execution details |
|
|
| 4688 | Security | Process Creation — captures command line arguments |
|
|
| 800 | Windows PowerShell | Pipeline execution (legacy) |
|
|
|
|
## Default Empire Launcher Pattern
|
|
|
|
```
|
|
powershell -noP -sta -w 1 -enc <Base64-payload>
|
|
```
|
|
|
|
### Launcher Flags
|
|
|
|
| Flag | Meaning |
|
|
|------|---------|
|
|
| `-noP` | No profile — skips PowerShell profile scripts |
|
|
| `-sta` | Single-threaded apartment |
|
|
| `-w 1` | Window style hidden |
|
|
| `-enc` | Encoded command (Base64 UTF-16LE) |
|
|
|
|
## Empire Stager IOC Patterns
|
|
|
|
| Pattern | Context |
|
|
|---------|---------|
|
|
| `System.Net.WebClient` | Downloads stager payload from listener |
|
|
| `.DownloadString()` | Fetches PowerShell script from C2 |
|
|
| `.DownloadData()` | Fetches binary data from C2 |
|
|
| `[System.Convert]::FromBase64String` | Decodes embedded payload |
|
|
| `IEX()` / `Invoke-Expression` | Executes downloaded script |
|
|
| `New-Object System.Net.WebClient` | Creates web client for download |
|
|
|
|
## Empire Module Signatures
|
|
|
|
| Module | MITRE | Description |
|
|
|--------|-------|-------------|
|
|
| `Invoke-Mimikatz` | T1003.001 | Credential dumping via Mimikatz |
|
|
| `Invoke-Kerberoast` | T1558.003 | Service ticket requests for offline cracking |
|
|
| `Invoke-TokenManipulation` | T1134 | Access token manipulation |
|
|
| `Invoke-PSInject` | T1055.012 | Process hollowing injection |
|
|
| `Invoke-DCOM` | T1021.003 | Lateral movement via DCOM |
|
|
| `Invoke-SMBExec` | T1021.002 | SMB-based lateral movement |
|
|
| `Invoke-WMIExec` | T1047 | WMI-based execution |
|
|
| `Invoke-RunAs` | T1134.002 | Create process with alternate token |
|
|
| `Invoke-SessionGopher` | T1552.001 | Extract saved session credentials |
|
|
| `Install-SSP` | T1547.005 | Security Support Provider persistence |
|
|
| `New-GPOImmediateTask` | T1484.001 | GPO abuse for execution |
|
|
|
|
## Default Empire Staging URIs
|
|
|
|
```
|
|
/login/process.php
|
|
/admin/get.php
|
|
/admin/news.php
|
|
/news.php
|
|
/login/process.jsp
|
|
```
|
|
|
|
## Splunk Detection Query
|
|
|
|
```spl
|
|
index=wineventlog source="WinEventLog:Microsoft-Windows-PowerShell/Operational" EventCode=4104
|
|
| where match(ScriptBlockText, "(?i)system\.net\.webclient") AND match(ScriptBlockText, "(?i)frombase64string")
|
|
| stats count by Computer, UserID, ScriptBlockText
|
|
```
|
|
|
|
## Elastic KQL Detection
|
|
|
|
```
|
|
event.code: "4104" AND powershell.file.script_block_text: (*System.Net.WebClient* AND *FromBase64String*)
|
|
```
|
|
|
|
## MITRE ATT&CK Mapping
|
|
|
|
- **T1059.001** — Command and Scripting Interpreter: PowerShell
|
|
- **T1071.001** — Application Layer Protocol: Web Protocols
|
|
- **T1027** — Obfuscated Files or Information
|
|
- **T1105** — Ingress Tool Transfer
|