Analyzing USB Device Connection History
When to Use
- When investigating potential data exfiltration via removable storage devices
- During insider threat investigations to track USB device usage
- For compliance audits verifying removable media policy enforcement
- When correlating USB connections with file access and copy events
- For establishing a timeline of device connections during an incident
Prerequisites
- Forensic image or extracted registry hives and event logs
- Access to SYSTEM, SOFTWARE, and NTUSER.DAT registry hives
- SetupAPI logs (setupapi.dev.log)
- Windows Event Logs (System, Security, DriverFrameworks-UserMode)
- USBDeview, USB Forensic Tracker, or RegRipper
- Understanding of USB device identification (VID, PID, serial number)
Workflow
Step 1: Extract USB-Related Artifacts
mount -o ro,loop,offset=$((2048*512)) /cases/case-2024-001/images/evidence.dd /mnt/evidence
mkdir -p /cases/case-2024-001/usb/
cp /mnt/evidence/Windows/System32/config/SYSTEM /cases/case-2024-001/usb/
cp /mnt/evidence/Windows/System32/config/SOFTWARE /cases/case-2024-001/usb/
cp /mnt/evidence/Users/*/NTUSER.DAT /cases/case-2024-001/usb/
cp /mnt/evidence/Windows/INF/setupapi.dev.log /cases/case-2024-001/usb/
cp /mnt/evidence/Windows/System32/winevt/Logs/System.evtx /cases/case-2024-001/usb/
cp "/mnt/evidence/Windows/System32/winevt/Logs/Microsoft-Windows-DriverFrameworks-UserMode%4Operational.evtx" \
/cases/case-2024-001/usb/ 2>/dev/null
cp "/mnt/evidence/Windows/System32/winevt/Logs/Microsoft-Windows-Partition%4Diagnostic.evtx" \
/cases/case-2024-001/usb/ 2>/dev/null
Step 2: Parse USBSTOR Registry Key
python3 << 'PYEOF'
from Registry import Registry
import json
reg = Registry.Registry("/cases/case-2024-001/usb/SYSTEM")
select = reg.open("Select")
current = select.value("Current").value()
controlset = f"ControlSet{current:03d}"
usbstor_path = f"{controlset}\\Enum\\USBSTOR"
usbstor = reg.open(usbstor_path)
devices = []
print("=== USBSTOR DEVICES ===\n")
for device_class in usbstor.subkeys():
class_name = device_class.name()
parts = class_name.split('&')
vendor = parts[1].replace('Ven_', '') if len(parts) > 1 else 'Unknown'
product = parts[2].replace('Prod_', '') if len(parts) > 2 else 'Unknown'
revision = parts[3].replace('Rev_', '') if len(parts) > 3 else 'Unknown'
for instance in device_class.subkeys():
serial = instance.name()
last_write = instance.timestamp()
device_info = {
'vendor': vendor,
'product': product,
'revision': revision,
'serial': serial,
'last_connected': str(last_write),
}
try:
friendly = instance.value("FriendlyName").value()
device_info['friendly_name'] = friendly
except:
pass
try:
params = instance.subkey("Device Parameters")
try:
device_info['class_guid'] = params.value("ClassGUID").value()
except:
pass
except:
pass
devices.append(device_info)
print(f"Device: {vendor} {product}")
print(f" Serial: {serial}")
print(f" Last Connected: {last_write}")
print(f" Friendly Name: {device_info.get('friendly_name', 'N/A')}")
print()
with open('/cases/case-2024-001/analysis/usb_devices.json', 'w') as f:
json.dump(devices, f, indent=2)
print(f"\nTotal USB storage devices found: {len(devices)}")
PYEOF
Step 3: Extract Drive Letter Assignments and User Associations
python3 << 'PYEOF'
from Registry import Registry
import struct
reg = Registry.Registry("/cases/case-2024-001/usb/SYSTEM")
mounted = reg.open("MountedDevices")
print("=== MOUNTED DEVICES (Drive Letter Assignments) ===\n")
for value in mounted.values():
name = value.name()
data = value.value()
if name.startswith("\\DosDevices\\"):
drive_letter = name.replace("\\DosDevices\\", "")
if len(data) > 24:
try:
device_path = data.decode('utf-16-le').strip('\x00')
if 'USBSTOR' in device_path or 'USB#' in device_path:
print(f" {drive_letter} -> {device_path}")
except:
pass
else:
disk_sig = struct.unpack('<I', data[0:4])[0]
offset = struct.unpack('<Q', data[4:12])[0]
print(f" {drive_letter} -> Disk Signature: 0x{disk_sig:08X}, Offset: {offset}")
PYEOF
python3 << 'PYEOF'
from Registry import Registry
import os, glob
print("\n=== USER MOUNT POINTS (MountPoints2) ===\n")
for ntuser in glob.glob("/cases/case-2024-001/usb/NTUSER*.DAT"):
try:
reg = Registry.Registry(ntuser)
mp2 = reg.open("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\MountPoints2")
(f)
key mp2.subkeys():
guid = key.name()
last_write = key.timestamp()
guid:
(f)
()
except Exception as e:
(f)
PYEOF
Step 4: Extract First Connection Timestamps from SetupAPI
python3 << 'PYEOF'
import re
print("=== SETUPAPI USB DEVICE INSTALLATIONS ===\n")
with open('/cases/case-2024-001/usb/setupapi.dev.log', 'r', errors='ignore') as f:
content = f.read()
pattern = r'>>>\s+\[Device Install.*?\n.*?Section start (\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2}).*?\n(.*?)<<<'
matches = re.findall(pattern, content, re.DOTALL)
usb_installs = []
for timestamp, section in matches:
if 'USBSTOR' in section or 'USB\\VID' in section:
dev_match = re.search(r'(USBSTOR\\[^\s]+|USB\\VID_\w+&PID_\w+[^\s]*)', section)
if dev_match:
device_id = dev_match.group(1)
usb_installs.append({
'first_install': timestamp,
'device_id': device_id
})
print(f" {timestamp} | {device_id}")
print(f"\nTotal USB installations found: {len(usb_installs)}")
PYEOF
python3 << 'PYEOF'
import json
from evtx import PyEvtxParser
try:
parser = PyEvtxParser("/cases/case-2024-001/usb/System.evtx")
print("\n=== SYSTEM EVENT LOG USB EVENTS ===\n")
for record in parser.records_json():
data = json.loads(record['data'])
event_id = str(data['Event'][][])
event_id (, , , ):
timestamp = data[][][][][]
event_data = data[].get(, data[].get(, {}))
(f)
except Exception as e:
(f)
PYEOF
Step 5: Build USB Activity Timeline and Report
python3 << 'PYEOF'
import json, csv
timeline = []
with open('/cases/case-2024-001/analysis/usb_devices.json') as f:
devices = json.load(f)
for device in devices:
timeline.append({
'timestamp': device['last_connected'],
'source': 'USBSTOR Registry',
'device': f"{device['vendor']} {device['product']}",
'serial': device['serial'],
'event': 'Last Connected',
'detail': device.get('friendly_name', '')
})
timeline.sort(key=lambda x: x['timestamp'])
with open('/cases/case-2024-001/analysis/usb_timeline.csv', 'w', newline='') as f:
writer = csv.DictWriter(f, fieldnames=['timestamp', 'source', 'device', 'serial', 'event', 'detail'])
writer.writeheader()
writer.writerows(timeline)
print(f"USB Timeline: {len(timeline)} events written to usb_timeline.csv")
print("\n=== USB DEVICE SUMMARY ===")
for entry in timeline:
print(f" {entry['timestamp']} | {entry['device']} | {entry['serial'][:20]} | {entry['event']}")
PYEOF
Key Concepts
| Concept | Description |
|---|
| USBSTOR | Registry key storing USB mass storage device identification and connection data |
| VID/PID | Vendor ID and Product ID uniquely identifying USB device manufacturer and model |
| Device serial number | Unique identifier for individual USB devices (some devices share serials) |
| MountedDevices | Registry key mapping volume GUIDs and drive letters to physical devices |
| MountPoints2 | Per-user registry key showing which volumes a user accessed |
| SetupAPI log | Windows driver installation log recording first-time device connections |
| DeviceContainers | Registry key in SOFTWARE hive with device metadata and timestamps |
| EMDMgmt | Registry key tracking ReadyBoost-compatible devices with serial numbers and timestamps |
Tools & Systems
| Tool | Purpose |
|---|
| USB Forensic Tracker | Specialized tool for USB device history extraction |
| USBDeview | NirSoft tool listing all USB devices connected to a system |
| RegRipper (usbstor plugin) | Automated USB artifact extraction from registry hives |
| Registry Explorer | Interactive registry analysis for USB-related keys |
| KAPE | Automated collection of USB-related artifacts |
| Plaso/log2timeline | Timeline creation including USB connection events |
| FTK Imager | Forensic imaging including removable media |
| Velociraptor | Endpoint agent with USB device history hunting artifacts |
Common Scenarios
Scenario 1: Data Exfiltration by Departing Employee
Extract USBSTOR entries to identify all USB devices ever connected, correlate device serial numbers with MountPoints2 to confirm user access, cross-reference timestamps with file access logs and jump list recent files, check for large file copy patterns in USN journal.
Scenario 2: Unauthorized Device on Secure System
Audit all USBSTOR entries against approved device list, identify unauthorized devices by VID/PID not matching corporate-approved hardware, determine when the unauthorized device was first and last connected, check if any data was transferred.
Scenario 3: Malware Delivery via USB
Identify USB device connected just before malware execution (Prefetch timestamps), extract the device serial and vendor information, check if autorun was enabled for the device, look for executable launch from the removable drive letter in Prefetch and ShimCache.
Scenario 4: Tracking a Specific USB Drive Across Multiple Systems
Search for the same device serial number in USBSTOR across all forensic images, build a map of which systems the drive was connected to and when, identify the chronological path of the device through the organization, correlate with network share access logs.
Output Format
USB Device History Analysis:
System: DESKTOP-ABC123 (Windows 10 Pro)
Total USB Storage Devices: 12
Analysis Sources: USBSTOR, MountedDevices, MountPoints2, SetupAPI, Event Logs
Device Inventory:
1. Kingston DataTraveler 3.0 (Serial: 0019E06B4521A2B0)
First Connected: 2024-01-10 09:15:32 (SetupAPI)
Last Connected: 2024-01-18 14:30:00 (USBSTOR)
Drive Letter: E:
User Access: suspect_user (MountPoints2)
2. WD My Passport (Serial: 575834314131363035)
First Connected: 2024-01-15 20:00:00
Last Connected: 2024-01-15 23:45:00
Drive Letter: F:
User Access: suspect_user
Suspicious Findings:
- Kingston drive connected 15 times during investigation period
- WD Passport connected only once, late evening (unusual hours)
- Unknown device (VID_1234&PID_5678) connected 2024-01-17, no matching approved device
Timeline: /cases/case-2024-001/analysis/usb_timeline.csv
