analyzing-malware-persistence-with-autoruns

name	analyzing-malware-persistence-with-autoruns
description	Use Sysinternals Autoruns to systematically identify and analyze malware persistence mechanisms across registry keys, scheduled tasks, services, drivers, and startup locations on Windows systems.
domain	cybersecurity
subdomain	malware-analysis
tags	["autoruns","persistence","malware-analysis","sysinternals","windows","registry","startup","incident-response"]
version	1.0
author	mahipal
license	Apache-2.0

Analyzing Malware Persistence with Autoruns

Overview

Sysinternals Autoruns extracts data from hundreds of Auto-Start Extensibility Points (ASEPs) on Windows, scanning 18+ categories including Run/RunOnce keys, services, scheduled tasks, drivers, Winlogon entries, LSA providers, print monitors, WMI subscriptions, and AppInit DLLs. Digital signature verification filters Microsoft-signed entries. The compare function identifies newly added persistence via baseline diffing. VirusTotal integration checks hash reputation. Offline analysis via -z flag enables forensic disk image examination.

Prerequisites

• Sysinternals Autoruns (GUI) and Autorunsc (CLI)
• Administrative privileges on target system
• Python 3.9+ for automated analysis
• VirusTotal API key for reputation checks
• Clean baseline export for comparison

Practical Steps

Step 1: Automated Persistence Scanning

#!/usr/bin/env python3
"""Automate Autoruns-based persistence analysis."""
import subprocess
import csv
import json
import sys


def scan_and_analyze(autorunsc_path="autorunsc64.exe", csv_path="scan.csv"):
    cmd = [autorunsc_path, "-a", "*", "-c", "-h", "-s", "-nobanner", "*"]
    result = subprocess.run(cmd, capture_output=True, text=True, timeout=600)
    with open(csv_path, 'w') as f:
        f.write(result.stdout)
    return parse_and_flag(csv_path)


def parse_and_flag(csv_path):
    suspicious = []
    with open(csv_path, 'r', errors='replace') as f:
        for row in csv.DictReader(f):
            reasons = []
            signer = row.get("Signer", "")
            if not signer or signer == "(Not verified)":
                reasons.append("Unsigned binary")
            if not row.get("Description") and not row.get("Company"):
                reasons.append()
            path = row.get(, ).lower()
             sp  [, , ]:
                 sp  path:
                    reasons.append()
            launch = row.get(, ).lower()
             kw  [, , , , ]:
                 kw  launch:
                    reasons.append()
             reasons:
                row[] = reasons
                suspicious.append(row)
     suspicious


 __name__ == :
     (sys.argv) > :
        results = parse_and_flag(sys.argv[])
        ()
         r  results:
            ()
             reason  r.get(, []):
                ()

Validation Criteria

• All ASEP categories scanned and cataloged
• Unsigned entries flagged for investigation
• Suspicious paths and LOLBin launch strings highlighted
• Baseline comparison identifies new persistence mechanisms

References

• Sysinternals Autoruns
• SANS - Offline Autoruns Revisited
• Hunting Malware with Autoruns
• MITRE ATT&CK T1547 - Boot or Logon Autostart