| name | analyzing-windows-registry-for-artifacts |
| description | 提取并分析 Windows 注册表配置单元,以发现用户活动、已安装软件、自启动条目及系统入侵证据。 |
| domain | cybersecurity |
| subdomain | digital-forensics |
| tags | ["forensics","windows-registry","artifact-analysis","regripper","registry-explorer","evidence-collection"] |
| version | 1.0 |
| author | mahipal |
| license | Apache-2.0 |
分析 Windows 注册表取证痕迹
适用场景
- 在事件期间调查 Windows 系统上的用户活动时
- 识别恶意软件使用的自启动/持久化机制时
- 追踪已安装软件、USB 设备及网络连接时
- 内部威胁调查中重建用户操作时
- 将注册表时间戳与其他取证痕迹关联时
前置条件
- 取证镜像或提取的注册表配置单元文件
- RegRipper、Registry Explorer(Eric Zimmerman)或 python-registry
- 访问注册表配置单元位置(SAM、SYSTEM、SOFTWARE、NTUSER.DAT、UsrClass.dat)
- 了解 Windows 注册表结构(配置单元、键、值)
- SIFT Workstation 或取证分析环境
工作流程
步骤 1:从取证镜像提取注册表配置单元
mkdir /mnt/evidence
mount -o ro,loop,offset=$((2048*512)) /cases/case-2024-001/images/evidence.dd /mnt/evidence
cp /mnt/evidence/Windows/System32/config/SAM /cases/case-2024-001/registry/
cp /mnt/evidence/Windows/System32/config/SYSTEM /cases/case-2024-001/registry/
cp /mnt/evidence/Windows/System32/config/SOFTWARE /cases/case-2024-001/registry/
cp /mnt/evidence/Windows/System32/config/SECURITY /cases/case-2024-001/registry/
cp /mnt/evidence/Windows/System32/config/DEFAULT /cases/case-2024-001/registry/
cp /mnt/evidence/Users/*/NTUSER.DAT /cases/case-2024-001/registry/
cp /mnt/evidence/Users/*/AppData/Local/Microsoft/Windows/UsrClass.dat /cases/case-2024-001/registry/
cp /mnt/evidence/Windows/System32/config/*.LOG* /cases/case-2024-001/registry/logs/
sha256sum /cases/case-2024-001/registry/* > /cases/case-2024-001/registry/hive_hashes.txt
步骤 2:使用 RegRipper 自动提取取证痕迹
git clone https://github.com/keydet89/RegRipper3.0.git /opt/regripper
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/NTUSER.DAT \
-f ntuser > /cases/case-2024-001/analysis/ntuser_report.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SYSTEM \
-f system > /cases/case-2024-001/analysis/system_report.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SOFTWARE \
-f software > /cases/case-2024-001/analysis/software_report.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SAM \
-f sam > /cases/case-2024-001/analysis/sam_report.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/NTUSER.DAT \
-p userassist > /cases/case-2024-001/analysis/userassist.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SYSTEM \
-p usbstor > /cases/case-2024-001/analysis/usbstor.txt
步骤 3:提取持久化和自启动条目
pip install python-registry
python3 << 'PYEOF'
from Registry import Registry
reg = Registry.Registry("/cases/case-2024-001/registry/SOFTWARE")
autorun_paths = [
"Microsoft\\Windows\\CurrentVersion\\Run",
"Microsoft\\Windows\\CurrentVersion\\RunOnce",
"Microsoft\\Windows\\CurrentVersion\\RunServices",
"Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer\\Run",
"Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Run"
]
for path in autorun_paths:
try:
key = reg.open(path)
print(f"\n=== {path} (Last Modified: {key.timestamp()}) ===")
for value in key.values():
print(f" {value.name()}: {value.value()}")
except Registry.RegistryKeyNotFoundException:
pass
key = reg.open("Microsoft\\Windows NT\\CurrentVersion\\Svchost")
print(f"\n=== Svchost Groups ===")
for value in key.values():
print(f" {value.name()}: {value.value()}")
PYEOF
python3 << 'PYEOF'
from Registry import Registry
reg = Registry.Registry("/cases/case-2024-001/registry/NTUSER.DAT")
user_autorun = [
"Software\\Microsoft\\Windows\\CurrentVersion\\Run",
"Software\\Microsoft\\Windows\\CurrentVersion\\RunOnce",
"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\StartupApproved\\Run"
]
for path in user_autorun:
try:
key = reg.open(path)
print(f"\n=== {path} (Last Modified: {key.timestamp()}) ===")
value key.values():
(f)
except Registry.RegistryKeyNotFoundException:
pass
PYEOF
步骤 4:分析用户活动取证痕迹
python3 << 'PYEOF'
from Registry import Registry
import codecs, struct, datetime
reg = Registry.Registry("/cases/case-2024-001/registry/NTUSER.DAT")
ua_path = "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\UserAssist"
key = reg.open(ua_path)
for guid_key in key.subkeys():
count_key = guid_key.subkey("Count")
print(f"\n=== {guid_key.name()} ===")
for value in count_key.values():
decoded_name = codecs.decode(value.name(), 'rot_13')
data = value.value()
if len(data) >= 16:
run_count = struct.unpack('<I', data[4:8])[0]
focus_count = struct.unpack('<I', data[8:12])[0]
timestamp = struct.unpack('<Q', data[60:68])[0] if len(data) >= 68 else 0
if timestamp > 0:
ts = datetime.datetime(1601,1,1) + datetime.timedelta(microseconds=timestamp//10)
print(f" {decoded_name}: Runs={run_count}, Focus={focus_count}, Last={ts}")
else:
print(f" {decoded_name}: Runs={run_count}, Focus={focus_count}")
PYEOF
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/NTUSER.DAT \
-p recentdocs > /cases/case-2024-001/analysis/recentdocs.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/NTUSER.DAT \
-p typedurls > /cases/case-2024-001/analysis/typedurls.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/NTUSER.DAT \
-p typedpaths > /cases/case-2024-001/analysis/typedpaths.txt
步骤 5:提取系统和网络信息
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SYSTEM \
-p compname > /cases/case-2024-001/analysis/system_info.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SYSTEM \
-p nic2 >> /cases/case-2024-001/analysis/system_info.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SOFTWARE \
-p networklist > /cases/case-2024-001/analysis/network_history.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SYSTEM \
-p timezone > /cases/case-2024-001/analysis/timezone.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SYSTEM \
-p shutdown > /cases/case-2024-001/analysis/shutdown.txt
perl /opt/regripper/rip.pl -r /cases/case-2024-001/registry/SOFTWARE \
-p uninstall > /cases/case-2024-001/analysis/installed_software.txt
核心概念
| 概念 | 描述 |
|---|
| 注册表配置单元(Registry hive) | 存储注册表某一部分的二进制文件(SAM、SYSTEM、SOFTWARE、NTUSER.DAT) |
| MRU(Most Recently Used,最近使用) | 跟踪最近访问的文件、命令和搜索词的列表 |
| UserAssist | 使用 ROT13 编码记录带时间戳的程序执行的注册表条目 |
| ShimCache | 记录已执行程序的应用程序兼容性缓存 |
| AmCache | 详细的执行历史,包含可执行文件的 SHA-1 哈希 |
| BAM/DAM | 在 Windows 10+ 中追踪程序执行的后台/桌面活动调节器 |
| 最后写入时间(Last Write Time) | 注册表键上的时间戳,表明上次修改时间 |
| 事务日志(Transaction logs) | 允许在异常关机后恢复注册表状态的日志文件 |
工具与系统
| 工具 | 用途 |
|---|
| RegRipper | 使用插件架构自动提取注册表取证痕迹 |
| Registry Explorer | Eric Zimmerman 用于交互式注册表分析的 GUI 工具 |
| python-registry | 用于编程化注册表配置单元解析的 Python 库 |
| RECmd | Eric Zimmerman 命令行注册表分析工具 |
| yarp | 用于 Python 分析的另一种注册表解析器 |
| AppCompatCacheParser | 专用 ShimCache/AppCompatCache 解析器 |
| AmcacheParser | 专用 AmCache.hve 分析工具 |
| ShellBags Explorer | 用于分析 ShellBag 取证痕迹的专用工具 |
常见场景
场景 1:恶意软件持久化调查
提取 SOFTWARE 和 NTUSER.DAT 配置单元,检查所有 Run/RunOnce 键中的未授权条目,检查服务中的可疑添加,检查计划任务注册表键,将自启动时间戳与恶意软件执行时间线关联。
场景 2:用户活动重建
分析 UserAssist 获取程序执行历史,检查 RecentDocs 获取已访问文件,检查 TypedPaths 获取资源管理器导航记录,提取 ShellBag 获取文件夹访问模式,围绕事件窗口构建用户活动时间线。
场景 3:未授权软件检测
解析 Uninstall 键获取所有已安装应用程序,与批准的软件基线比较,检查 BAM/DAM 获取批准列表之外最近执行的程序,检查 AppCompatCache 获取即使在卸载后也有的执行证据。
场景 4:USB 数据外泄调查
从 SYSTEM 配置单元提取 USBSTOR 条目获取已连接设备,将设备序列号与 MountedDevices 关联,检查 NTUSER.DAT MountPoints2 获取用户访问可移动介质的记录,检查 SetupAPI 日志获取首次连接时间戳。
输出格式
Registry Analysis Summary:
System: DESKTOP-ABC123 (Windows 10 Pro Build 19041)
Timezone: Eastern Standard Time (UTC-5)
Last Shutdown: 2024-01-18 23:45:12 UTC
Autorun Entries:
HKLM Run: 5 entries (1 suspicious: "updater.exe" -> C:\ProgramData\svc\updater.exe)
HKCU Run: 3 entries (all legitimate)
Services: 142 entries (2 unknown: "WinDefSvc", "SysMonAgent")
User Activity (NTUSER.DAT):
UserAssist Programs: 234 entries
Recent Documents: 89 entries
Typed URLs: 45 entries
Typed Paths: 12 entries
USB Devices Connected:
- Kingston DataTraveler (Serial: 0019E06B4521) - First: 2024-01-10, Last: 2024-01-18
- WD My Passport (Serial: 575834314131) - First: 2024-01-15, Last: 2024-01-15
Installed Software: 127 applications
Suspicious Findings: 3 items flagged for review