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Skills added: - implementing-privileged-access-workstation (IAM, PAW hardening) - detecting-suspicious-oauth-application-consent (cloud security, Graph API) - performing-hardware-security-module-integration (cryptography, PKCS#11) - analyzing-android-malware-with-apktool (malware analysis, androguard) - hunting-for-unusual-service-installations (threat hunting, T1543.003) - detecting-shadow-it-cloud-usage (cloud security, proxy/DNS log analysis) - performing-active-directory-forest-trust-attack (red team, impacket) - implementing-deception-based-detection-with-canarytoken (deception, Canary API) - analyzing-office365-audit-logs-for-compromise (cloud security, BEC detection) - hunting-for-startup-folder-persistence (threat hunting, T1547.001) Each skill includes SKILL.md, LICENSE, scripts/agent.py, references/api-reference.md
2.6 KiB
2.6 KiB
API Reference — Hunting for Unusual Service Installations
Libraries Used
- python-evtx: Parse Windows .evtx event log files
- lxml: XML parsing of EVTX record XML
- re: Regex matching for suspicious binary path patterns
- collections.Counter: Statistics aggregation
CLI Interface
python agent.py System.evtx parse
python agent.py System.evtx hunt
python agent.py System.evtx stats
python agent.py System.evtx full
Core Functions
parse_evtx_events(evtx_path) — Extract Event ID 7045 records
Opens .evtx file with evtx.Evtx(), iterates records, parses XML with lxml.
Extracts: ServiceName, ImagePath, ServiceType, StartType, AccountName, timestamp.
Namespace: http://schemas.microsoft.com/win/2004/08/events/event
analyze_service_path(image_path) — Binary path risk analysis
Matches against 17 suspicious patterns (temp dirs, PowerShell, encoded commands, LOLBins, download patterns). Checks against 5 legitimate path prefixes. Scoring: +20 for non-standard path, +15 per suspicious indicator. Max 100.
hunt_suspicious_services(evtx_path) — Main hunting engine
Combines parsing and analysis. Extra +20 risk for LocalSystem account with non-standard binary path. Results sorted by risk score descending.
generate_statistics(results) — Summary statistics
Counts risk distribution, top indicators, service account usage.
full_hunt(evtx_path) — Comprehensive threat hunt report
Suspicious Path Patterns
| Pattern | Indicator |
|---|---|
\temp\, \tmp\ |
temp_directory |
\appdata\ |
appdata_directory |
\users\public\ |
public_user_directory |
powershell.exe |
powershell_execution |
cmd.exe /c |
cmd_execution |
-enc, -encodedcommand |
encoded_command |
downloadstring, webclient |
download_pattern |
invoke-expression, iex |
invoke_expression |
mshta, regsvr32, rundll32 |
lolbin_execution |
Legitimate Service Path Prefixes
C:\Windows\System32\C:\Windows\SysWOW64\C:\Program Files\C:\Program Files (x86)\C:\Windows\Microsoft.NET\
Event ID 7045 Fields
| Field | Description |
|---|---|
| ServiceName | Display name of installed service |
| ImagePath | Binary path and arguments |
| ServiceType | user mode service, kernel driver, etc. |
| StartType | auto start, demand start, boot start |
| AccountName | Service account (LocalSystem, etc.) |
MITRE ATT&CK Mapping
- T1543.003 — Create or Modify System Process: Windows Service
- Tactics: Persistence, Privilege Escalation
Dependencies
python-evtx>= 0.7.4lxml>= 4.9.0