用 Tetragon 关联容器文件、网络和凭据变更事件

apiVersion: cilium.io/v1alpha1
kind: TracingPolicy
metadata:
  name: "file-monitoring"
spec:
  kprobes:
  - call: "security_file_permission"
    syscall: false
    return: true
    args:
    - index: 0
      type: "file" # (struct file *) used for getting the path
    - index: 1
      type: "int" # 0x04 is MAY_READ, 0x02 is MAY_WRITE
    returnArg:
      index: 0
      type: "int"
    selectors:
    - matchArgs:
      - index: 0
        operator: "Prefix"
        values:
        - "/etc/" # filenames to filter for
  - call: "security_mmap_file"
    syscall: false
    return: true
    args:
    - index: 0
      type: "file" # (struct file *) used for getting the path
    - index: 1
      type: "uint32" # the prot flags PROT_READ(0x01), PROT_WRITE(0x02), PROT_EXEC(0x04)
    - index: 2
      type: "nop" # the mmap flags (i.e. MAP_SHARED, ...)
    returnArg:
      index: 0
      type: "int"
    selectors:
    - matchArgs:
      - index: 0
        operator: "Prefix"
        values:
        - "/etc/" # filenames to filter for
  - call: "security_file_truncate"
    syscall: false
    return: true
    args:
    - index: 0
      type: "file" # (struct file *) used for getting the path
    returnArg:
      index: 0
      type: "int"
    selectors:
    - matchArgs:
      - index: 0
        operator: "Prefix"
        values:
        - "/etc/" # filenames to filter for

{
  "process_kprobe": {
    "process": {
      "exec_id": "dGV0cmFnb24tZGV2LWNvbnRyb2wtcGxhbmU6MTY4MTc3MDUwMTI1NDI6NjQ3NDY=",
      "pid": 64746,
      "uid": 0,
      "cwd": "/",
      "binary": "/bin/vi",
      "arguments": "/etc/passwd",
      "flags": "execve rootcwd clone",
      "start_time": "2024-04-14T02:18:02.240856427Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "file-access",
        "container": {
          "id": "containerd://6b742e38ee3a212239e6d48b2954435a407af44b9a354bdf540db22f460ab40e",
          "name": "file-access",
          "image": {
            "id": "docker.io/library/busybox@sha256:c3839dd800b9eb7603340509769c43e146a74c63dca3045a8e7dc8ee07e53966",
            "name": "docker.io/library/busybox:latest"
          },
          "start_time": "2024-04-14T02:17:46Z",
          "pid": 12
        },
        "pod_labels": {
          "run": "file-access"
        },
        "workload": "file-access",
        "workload_kind": "Pod"
      },
      "docker": "6b742e38ee3a212239e6d48b2954435",
      "parent_exec_id": "dGV0cmFnb24tZGV2LWNvbnRyb2wtcGxhbmU6MTY4MDE3MDQ3OTQyOTg6NjQ2MTU=",
      "refcnt": 1,
      "tid": 64746
    },
    "parent": {
      "exec_id": "dGV0cmFnb24tZGV2LWNvbnRyb2wtcGxhbmU6MTY4MDE3MDQ3OTQyOTg6NjQ2MTU=",
      "pid": 64615,
      "uid": 0,
      "cwd": "/",
      "binary": "/bin/sh",
      "flags": "execve rootcwd clone",
      "start_time": "2024-04-14T02:17:46.240638141Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "file-access",
        "container": {
          "id": "containerd://6b742e38ee3a212239e6d48b2954435a407af44b9a354bdf540db22f460ab40e",
          "name": "file-access",
          "image": {
            "id": "docker.io/library/busybox@sha256:c3839dd800b9eb7603340509769c43e146a74c63dca3045a8e7dc8ee07e53966",
            "name": "docker.io/library/busybox:latest"
          },
          "start_time": "2024-04-14T02:17:46Z",
          "pid": 1
        },
        "pod_labels": {
          "run": "file-access"
        },
        "workload": "file-access",
        "workload_kind": "Pod"
      },
      "docker": "6b742e38ee3a212239e6d48b2954435",
      "parent_exec_id": "dGV0cmFnb24tZGV2LWNvbnRyb2wtcGxhbmU6MTY3OTgyOTA2MDc3NTc6NjQ1NjQ=",
      "tid": 64615
    },
    "function_name": "security_file_permission",
    "args": [
      {
        "file_arg": {
          "path": "/etc/passwd",
          "permission": "-rw-r--r--"
        }
      },
      {
        "int_arg": 2
      }
    ],
    "return": {
      "int_arg": 0
    },
    "action": "KPROBE_ACTION_POST",
    "policy_name": "file-monitoring",
    "return_action": "KPROBE_ACTION_POST"
  },
  "node_name": "tetragon-dev-control-plane",
  "time": "2024-04-14T02:18:14.376304204Z"
}

apiVersion: cilium.io/v1alpha1
kind: TracingPolicy
metadata:
  name: "connect"
spec:
  kprobes:
  - call: "tcp_connect"
    syscall: false
    args:
    - index: 0
      type: "sock"
  - call: "tcp_close"
    syscall: false
    args:
    - index: 0
      type: "sock"
  - call: "tcp_sendmsg"
    syscall: false
    args:
    - index: 0
      type: "sock"
    - index: 2
      type: int

# This 'process.credentials.changes.at.syscalls' Tracing Policy
# monitors processes trying to change their credentials inside
# a pid namespace. If you want to monitor all processes including
# host ones, remove the matchNamespaces selector.
#
# Monitors the following system calls:
#  - setuid(), setgid(), setfsuid(), setfsgid()
#    setreuid(), setregid(), setresuid(), setresgid()
#
#  - setgroups() TODO
#
apiVersion: cilium.io/v1alpha1
kind: TracingPolicy
metadata:
  name: "process.credentials.changes.at.syscalls"
spec:
  kprobes:
  - call: "sys_setuid"
    syscall: true
    args:
    - index: 0
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"
  - call: "sys_setgid"
    syscall: true
    args:
    - index: 0
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"
  - call: "sys_setreuid"
    syscall: true
    args:
    - index: 0
      type: "int"
    - index: 1
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"
  - call: "sys_setregid"
    syscall: true
    args:
    - index: 0
      type: "int"
    - index: 1
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"
  - call: "sys_setresuid"
    syscall: true
    args:
    - index: 0
      type: "int"
    - index: 1
      type: "int"
    - index: 2
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"
  - call: "sys_setresgid"
    syscall: true
    args:
    - index: 0
      type: "int"
    - index: 1
      type: "int"
    - index: 2
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"
  - call: "sys_setfsuid"
    syscall: true
    args:
    - index: 0
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"
  - call: "sys_setfsgid"
    syscall: true
    args:
    - index: 0
      type: "int"
    selectors:
      - matchNamespaces:
        - namespace: Pid
          operator: NotIn
          values:
          - "host_ns"

{
  "process_kprobe": {
    "process": {
      "exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk4ODc2MDI2NTk4OjEyNTc5OA==",
      "pid": 125798,
      "uid": 0,
      "cwd": "/",
      "binary": "/bin/su",
      "arguments": "root",
      "flags": "execve rootcwd clone",
      "start_time": "2023-07-05T19:14:30.918693157Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "xwing",
        "container": {
          "id": "containerd://55936e548de63f77ceb595d64966dd8e267b391ff0ef63b26c17eb8c2f6510be",
          "name": "spaceship",
          "image": {
            "id": "docker.io/tgraf/netperf@sha256:8e86f744bfea165fd4ce68caa05abc96500f40130b857773186401926af7e9e6",
            "name": "docker.io/tgraf/netperf:latest"
          },
          "start_time": "2023-07-05T18:45:16Z",
          "pid": 19
        },
        "pod_labels": {
          "app.kubernetes.io/name": "xwing",
          "class": "xwing",
          "org": "alliance"
        }
      },
      "docker": "55936e548de63f77ceb595d64966dd8",
      "parent_exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk1NjYyMDM3MzMyOjEyNTc5Mg==",
      "refcnt": 1,
      "tid": 125798
    },
    "parent": {
      "exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk1NjYyMDM3MzMyOjEyNTc5Mg==",
      "pid": 125792,
      "uid": 0,
      "cwd": "/",
      "binary": "/bin/bash",
      "flags": "execve rootcwd clone",
      "start_time": "2023-07-05T19:14:27.704703805Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "xwing",
        "container": {
          "id": "containerd://55936e548de63f77ceb595d64966dd8e267b391ff0ef63b26c17eb8c2f6510be",
          "name": "spaceship",
          "image": {
            "id": "docker.io/tgraf/netperf@sha256:8e86f744bfea165fd4ce68caa05abc96500f40130b857773186401926af7e9e6",
            "name": "docker.io/tgraf/netperf:latest"
          },
          "start_time": "2023-07-05T18:45:16Z",
          "pid": 13
        },
        "pod_labels": {
          "app.kubernetes.io/name": "xwing",
          "class": "xwing",
          "org": "alliance"
        }
      },
      "docker": "55936e548de63f77ceb595d64966dd8",
      "parent_exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk1NjE2MTU0NzA2OjEyNTc4Mw==",
      "refcnt": 2,
      "tid": 125792
    },
    "function_name": "__x64_sys_setgid",
    "args": [
      {
        "int_arg": 0
      }
    ],
    "action": "KPROBE_ACTION_POST"
  },
  "node_name": "kind-control-plane",
  "time": "2023-07-05T19:14:30.918977160Z"
}

{
  "process_kprobe": {
    "process": {
      "exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk4ODc2MDI2NTk4OjEyNTc5OA==",
      "pid": 125798,
      "uid": 0,
      "cwd": "/",
      "binary": "/bin/su",
      "arguments": "root",
      "flags": "execve rootcwd clone",
      "start_time": "2023-07-05T19:14:30.918693157Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "xwing",
        "container": {
          "id": "containerd://55936e548de63f77ceb595d64966dd8e267b391ff0ef63b26c17eb8c2f6510be",
          "name": "spaceship",
          "image": {
            "id": "docker.io/tgraf/netperf@sha256:8e86f744bfea165fd4ce68caa05abc96500f40130b857773186401926af7e9e6",
            "name": "docker.io/tgraf/netperf:latest"
          },
          "start_time": "2023-07-05T18:45:16Z",
          "pid": 19
        },
        "pod_labels": {
          "app.kubernetes.io/name": "xwing",
          "class": "xwing",
          "org": "alliance"
        }
      },
      "docker": "55936e548de63f77ceb595d64966dd8",
      "parent_exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk1NjYyMDM3MzMyOjEyNTc5Mg==",
      "refcnt": 1,
      "tid": 125798
    },
    "parent": {
      "exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk1NjYyMDM3MzMyOjEyNTc5Mg==",
      "pid": 125792,
      "uid": 0,
      "cwd": "/",
      "binary": "/bin/bash",
      "flags": "execve rootcwd clone",
      "start_time": "2023-07-05T19:14:27.704703805Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "xwing",
        "container": {
          "id": "containerd://55936e548de63f77ceb595d64966dd8e267b391ff0ef63b26c17eb8c2f6510be",
          "name": "spaceship",
          "image": {
            "id": "docker.io/tgraf/netperf@sha256:8e86f744bfea165fd4ce68caa05abc96500f40130b857773186401926af7e9e6",
            "name": "docker.io/tgraf/netperf:latest"
          },
          "start_time": "2023-07-05T18:45:16Z",
          "pid": 13
        },
        "pod_labels": {
          "app.kubernetes.io/name": "xwing",
          "class": "xwing",
          "org": "alliance"
        }
      },
      "docker": "55936e548de63f77ceb595d64966dd8",
      "parent_exec_id": "a2luZC1jb250cm9sLXBsYW5lOjQwNzk1NjE2MTU0NzA2OjEyNTc4Mw==",
      "refcnt": 2,
      "tid": 125792
    },
    "function_name": "__x64_sys_setuid",
    "args": [
      {
        "int_arg": 0
      }
    ],
    "action": "KPROBE_ACTION_POST"
  },
  "node_name": "kind-control-plane",
  "time": "2023-07-05T19:14:30.918990583Z"
}

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