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SKILL verified Apache-2.0 Self-run

Analyzing Linux Kernel Rootkits

skill-killvxk-cybersecurity-skills-zh-analyzing-linux-kernel-rootkits · by killvxk

使用 Volatility3 Linux 插件(check_syscall、lsmod、hidden_modules)分析 Linux 内存转储,结合 rkhunter 系统扫描和 /proc 与 /sys 差异分析,检测 hooked syscall、隐藏内核模块和被篡改的系统结构,以识别内核级 rootkit。

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Install

$ agentstack add skill-killvxk-cybersecurity-skills-zh-analyzing-linux-kernel-rootkits

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • Prompt-injection patterns
  • Secret / credential exfiltration
  • Dangerous shell & filesystem operations
  • Untrusted network calls
  • Known-malicious package signatures

What it can access

  • Network access No
  • Filesystem access No
  • Shell / process execution No
  • Environment & secrets No
  • Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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Reliability & compatibility

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About

分析 Linux 内核 Rootkit

概述

Linux 内核 rootkit 在 ring 0 层级运行,通过修改内核数据结构来对用户态工具隐藏进程、文件、网络连接和内核模块。检测方法需要使用内存取证(使用 Volatility3 分析物理内存转储)或交叉视图分析(比对 /proc、/sys 和内核数据结构的不一致性)。本 skill 涵盖使用 Volatility3 Linux 插件检测 syscall 表 hook、隐藏内核模块和被修改的函数指针,以及使用 rkhunter 和 chkrootkit 进行实时系统扫描。

前置条件

  • 已安装 Volatility3(pip install volatility3)
  • Linux 内存转储(通过 LiME、AVML 或 /proc/kcore 获取)
  • 与目标内核版本匹配的 Volatility3 Linux 符号表(ISF)
  • 用于实时系统扫描的 rkhunter 和 chkrootkit
  • 用于比对的已知良好内核镜像

步骤

步骤 1:获取内存转储

使用 LiME 内核模块或针对云实例的 AVML 捕获 Linux 物理内存。

步骤 2:使用 Volatility3 分析

运行 linux.checksyscall、linux.lsmod、linux.hiddenmodules 和 linux.check_idt 插件以检测 rootkit 痕迹。

步骤 3:交叉视图分析

比较来自 /proc/modules、lsmod 和 /sys/module 的模块列表,识别在某一视图中隐藏但在另一视图中存在的模块。

步骤 4:实时系统扫描

运行 rkhunter 和 chkrootkit,检测已知 rootkit 特征、可疑文件和被修改的系统二进制文件。

预期输出

JSON 报告,包含检测到的 syscall hook、隐藏内核模块、被修改的 IDT 条目、可疑的 /proc 差异以及 rkhunter 发现。

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.