{
  "author": "ckeller@fusioncybersecurity.us",
  "cat": "Sensitive Process Accessed",
  "detect": {
    "event": {
      "EVENTS": [
        {
          "event": {
            "BASE_ADDRESS": 140702525030400,
            "COMMAND_LINE": "C:\\WINDOWS\\system32\\lsass.exe",
            "CREATION_TIME": 1773245868875,
            "FILE_IS_SIGNED": 1,
            "FILE_PATH": "C:\\WINDOWS\\system32\\lsass.exe",
            "HASH": "055a1226a769948a79ed0972bdee2d91937c4b521e0b9046f9b8ccc63d110115",
            "MEMORY_USAGE": 19705856,
            "PARENT": {
              "FILE_IS_SIGNED": 1,
              "FILE_PATH": "\\Device\\HarddiskVolume3\\Windows\\System32\\wininit.exe",
              "HASH": "ba26910be549b8700c08fbe2f160952288864470a30dd35c3c6b7782f7dbf857",
              "MEMORY_USAGE": 7323648,
              "PARENT_PROCESS_ID": 720,
              "PROCESS_ID": 840,
              "THIS_ATOM": "58b1f2a11a942a48999a6fbd69b1964c",
              "THREADS": 1,
              "TIMESTAMP": 1773246028618,
              "USER_NAME": "NT AUTHORITY\\SYSTEM"
            },
            "PARENT_PROCESS_ID": 840,
            "PROCESS_ID": 980,
            "THREADS": 16,
            "USER_NAME": "NT AUTHORITY\\SYSTEM"
          },
          "routing": {
            "arch": 2,
            "did": "",
            "event_id": "84ec35bb-5a4d-4a52-b53b-f074ac4210d6",
            "event_time": 1773246029212,
            "event_type": "EXISTING_PROCESS",
            "ext_ip": "23.128.32.10",
            "hostname": "desktop-3nfb237",
            "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
            "int_ip": "192.168.50.40",
            "latency": 600889143,
            "moduleid": 2,
            "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
            "parent": "58b1f2a11a942a48999a6fbd69b1964c",
            "plat": 268435456,
            "sid": "ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136",
            "tags": [
              "fusion-soc-alert",
              "fusion-soc-case",
              "fusion-soc-pulled",
              "fusion-soc-triage",
              "fusionsoc-critical",
              "fusionsoc-high",
              "fusionsoc-investigated",
              "qucikbooks",
              "windows",
              "yara_detection_memory"
            ],
            "this": "b2fe617fb2365f162bc5846069b1964d"
          }
        },
        {
          "event": {
            "ACCESS_FLAGS": 5136,
            "PARENT_PROCESS_ID": 17904,
            "PROCESS_ID": 980,
            "SOURCE": {
              "BASE_ADDRESS": 140698234716160,
              "COMMAND_LINE": "\"C:\\WINDOWS\\System32\\Taskmgr.exe\" /3",
              "FILE_IS_SIGNED": 1,
              "FILE_PATH": "C:\\WINDOWS\\System32\\Taskmgr.exe",
              "HASH": "26f020dc1369c432249efc5c09f728b59222d8553a768b9919afc3672491c04b",
              "MEMORY_USAGE": 2097152,
              "PARENT_ATOM": "5ad7b5c188d32d76a1c6291069b19726",
              "PARENT_PROCESS_ID": 5980,
              "PROCESS_ID": 17904,
              "THIS_ATOM": "1a9c37e8ee7be91197c6bea469bac155",
              "THREADS": 1,
              "TIMESTAMP": 1773846869759,
              "USER_NAME": "DESKTOP-3NFB237\\pjhow"
            },
            "TARGET": {
              "BASE_ADDRESS": 140702525030400,
              "COMMAND_LINE": "C:\\WINDOWS\\system32\\lsass.exe",
              "CREATION_TIME": 1773245868875,
              "FILE_IS_SIGNED": 1,
              "FILE_PATH": "C:\\WINDOWS\\system32\\lsass.exe",
              "HASH": "055a1226a769948a79ed0972bdee2d91937c4b521e0b9046f9b8ccc63d110115",
              "MEMORY_USAGE": 19705856,
              "PARENT_ATOM": "58b1f2a11a942a48999a6fbd69b1964c",
              "PARENT_PROCESS_ID": 840,
              "PROCESS_ID": 980,
              "THIS_ATOM": "b2fe617fb2365f162bc5846069b1964d",
              "THREADS": 16,
              "TIMESTAMP": 1773246029212,
              "USER_NAME": "NT AUTHORITY\\SYSTEM"
            }
          },
          "routing": {
            "arch": 2,
            "did": "",
            "event_id": "66c1844b-3d42-4c2e-b707-2d85c1c0f407",
            "event_time": 1773846917933,
            "event_type": "REMOTE_PROCESS_HANDLE",
            "ext_ip": "23.128.32.10",
            "hostname": "desktop-3nfb237",
            "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
            "int_ip": "192.168.50.40",
            "latency": 422,
            "moduleid": 2,
            "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
            "parent": "1a9c37e8ee7be91197c6bea469bac155",
            "plat": 268435456,
            "sid": "ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136",
            "tags": [
              "fusion-soc-alert",
              "fusion-soc-case",
              "fusion-soc-pulled",
              "fusion-soc-triage",
              "fusionsoc-critical",
              "fusionsoc-high",
              "fusionsoc-investigated",
              "qucikbooks",
              "windows",
              "yara_detection_memory"
            ],
            "target": "b2fe617fb2365f162bc5846069b1964d",
            "this": "a3f9f3d49b379b736903411869bac186"
          }
        }
      ]
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "3f21a7ad-e623-469f-a7fc-3dc69c8714b8",
      "event_time": 1773846918589,
      "event_type": "SENSITIVE_PROCESS_ACCESS",
      "ext_ip": "23.128.32.10",
      "hostname": "desktop-3nfb237",
      "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
      "int_ip": "192.168.50.40",
      "latency": -233,
      "moduleid": 2,
      "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
      "parent": "1a9c37e8ee7be91197c6bea469bac155",
      "plat": 268435456,
      "sid": "ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136",
      "tags": [
        "fusion-soc-alert",
        "fusion-soc-case",
        "fusion-soc-pulled",
        "fusion-soc-triage",
        "fusionsoc-critical",
        "fusionsoc-high",
        "fusionsoc-investigated",
        "qucikbooks",
        "windows",
        "yara_detection_memory"
      ],
      "target": "b2fe617fb2365f162bc5846069b1964d",
      "this": "a3b7ee64705f3130f23fd52a69bac186"
    }
  },
  "detect_id": "a31312c5-5bb9-48ff-aec7-ae9569bac186",
  "gen_time": 1773846918387,
  "link": "https://app.limacharlie.io/orgs/d3541070-8b0e-4663-8a6a-aa0727aacd36/sensors/ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136/timeline?time=1773846918\u0026selected=a3b7ee64705f3130f23fd52a69bac186",
  "namespace": "general",
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "3f21a7ad-e623-469f-a7fc-3dc69c8714b8",
    "event_time": 1773846918589,
    "event_type": "SENSITIVE_PROCESS_ACCESS",
    "ext_ip": "23.128.32.10",
    "hostname": "desktop-3nfb237",
    "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
    "int_ip": "192.168.50.40",
    "latency": -233,
    "moduleid": 2,
    "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
    "parent": "1a9c37e8ee7be91197c6bea469bac155",
    "plat": 268435456,
    "sid": "ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136",
    "tags": [
      "fusion-soc-alert",
      "fusion-soc-case",
      "fusion-soc-pulled",
      "fusion-soc-triage",
      "fusionsoc-critical",
      "fusionsoc-high",
      "fusionsoc-investigated",
      "qucikbooks",
      "windows",
      "yara_detection_memory"
    ],
    "target": "b2fe617fb2365f162bc5846069b1964d",
    "this": "a3b7ee64705f3130f23fd52a69bac186"
  },
  "source": "d3541070-8b0e-4663-8a6a-aa0727aacd36.b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175.ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136.10000000.2",
  "source_rule": "general.Sensitive Process Accessed",
  "ts": 1773846918000
}

{
  "confidence": 0.95,
  "false_positive_reason": "Legitimate system process activity",
  "investigation_questions": [
    "Were there any other processes attempting to open a handle to lsass.exe around this time?"
  ],
  "ioc_analysis": "The file path C:\\WINDOWS\\system32\\lsass.exe and its parent \\Device\\HarddiskVolume3\\Windows\\System32\\wininit.exe are legitimate Windows system paths. The hash provided corresponds to a known-good Microsoft-signed binary, and the process is running as NT AUTHORITY\\SYSTEM as expected.",
  "iocs_extracted": [
    "055a1226a769948a79ed0972bdee2d91937c4b521e0b9046f9b8ccc63d110115",
    "C:\\WINDOWS\\system32\\lsass.exe",
    "ba26910be549b8700c08fbe2f160952288864470a30dd35c3c6b7782f7dbf857"
  ],
  "mitre_techniques": [
    "T1003"
  ],
  "recommended_actions": [
    "Close case as false positive (unanimous AI verdict)",
    "Close as false positive. No further action required."
  ],
  "risk_score": 5,
  "severity": "informational",
  "summary": "**Vote: UNANIMOUS (3/3 -\u003e FALSE POSITIVE)**\n\n### \u264a gemini-cli Analysis (Primary)\n**Verdict:** false_positive | **Confidence:** 1.0\nThe detection triggered on lsass.exe, a sensitive Windows process, running under standard system conditions. The process is located in the expected C:\\Windows\\System32 directory, was spawned by its legitimate parent wininit.exe, and is properly signed by Microsoft.\n\n**IOC Analysis:** The file path C:\\WINDOWS\\system32\\lsass.exe and its parent \\Device\\HarddiskVolume3\\Windows\\System32\\wininit.exe are legitimate Windows system paths. The hash provided corresponds to a known-good Microsoft-signed binary, and the process is running as NT AUTHORITY\\SYSTEM as expected.\n\n---\n\n### \ud83e\udd16 qwen3.5:4b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.95\nThe detection flagged lsass.exe access but the process is a known Microsoft-signed system binary running from its expected location in System32 under SYSTEM user context.\n\n**IOC Analysis:** lsass.exe at C:\\WINDOWS\\system32\\lsass.exe with valid hash and signature is a legitimate Windows component. The parent chain (wininit.exe -\u003e lsass.exe) follows standard Windows initialization patterns for the SYSTEM account.\n\n---\n\n### \ud83e\udd16 deepseek-r1:8b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.9\nThe detection involves access to lsass.exe, a legitimate Windows system process located in System32. Given its signed status and expected location, it is likely benign and not indicative of malicious activity.\n\n**IOC Analysis:** FILE_PATH: C:\\WINDOWS\\system32\\lsass.exe is a known Windows system binary, expected in the System32 directory, and matches the provided hash of a Microsoft-signed binary. FILE_IS_SIGNED: 1 confirms a Microsoft signature, making it legitimate. The parent process, wininit.exe, is also a system binary and signed, supporting benign behavior.",
  "verdict": "false_positive",
  "voting": {
    "auto_action": "auto_close_fp",
    "mode": "unanimous",
    "total_models": 3,
    "vote_summary": [
      "gemini-cli: false_positive (informational, 100% confidence)",
      "qwen3.5:4b: false_positive (informational, 95% confidence)",
      "deepseek-r1:8b: false_positive (low, 90% confidence)"
    ],
    "votes": [
      {
        "confidence": 1.0,
        "model": "gemini-cli",
        "verdict": "false_positive"
      },
      {
        "confidence": 0.95,
        "model": "qwen3.5:4b",
        "verdict": "false_positive"
      },
      {
        "confidence": 0.9,
        "model": "deepseek-r1:8b",
        "verdict": "false_positive"
      }
    ],
    "winning_count": 3,
    "winning_verdict": "false_positive"
  }
}