{
  "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": "ff445bad-fada-4c72-bf00-8d1462182802",
            "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": 942962511,
            "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"
            ],
            "this": "b2fe617fb2365f162bc5846069b1964d"
          }
        },
        {
          "event": {
            "ACCESS_FLAGS": 1053713,
            "PARENT_PROCESS_ID": 13476,
            "PROCESS_ID": 980,
            "SOURCE": {
              "BASE_ADDRESS": 140701196484608,
              "COMMAND_LINE": "OfficeClickToRun.exe /update",
              "FILE_IS_SIGNED": 1,
              "FILE_PATH": "C:\\Program Files\\Common Files\\Microsoft Shared\\ClickToRun\\Updates\\16.0.19725.20190\\OfficeClickToRun.exe",
              "HASH": "d5ac60e36698371e1bd921e588371c9fcc245138287a02bdc47c2dd7605bb964",
              "MEMORY_USAGE": 2215936,
              "PARENT_ATOM": "627783c235de23a4e2519cc769b7119d",
              "PARENT_PROCESS_ID": 15292,
              "PROCESS_ID": 13476,
              "THIS_ATOM": "a2892b990a00e0ea9ee3602369bff6f3",
              "THREADS": 1,
              "TIMESTAMP": 1774188275462,
              "USER_NAME": "NT AUTHORITY\\SYSTEM"
            },
            "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": "d728ff8f-53af-4333-b3bc-c708e73257ad",
            "event_time": 1774188991714,
            "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": 9,
            "moduleid": 2,
            "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
            "parent": "a2892b990a00e0ea9ee3602369bff6f3",
            "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"
            ],
            "target": "b2fe617fb2365f162bc5846069b1964d",
            "this": "c6b3a1448ae3f8730d9eb84269bff9bf"
          }
        }
      ]
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "da3caa39-0077-4ffa-9a1b-5b8c2c20388d",
      "event_time": 1774188991824,
      "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": -100,
      "moduleid": 2,
      "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
      "parent": "a2892b990a00e0ea9ee3602369bff6f3",
      "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"
      ],
      "target": "b2fe617fb2365f162bc5846069b1964d",
      "this": "65d916487d357c1d6130a84c69bff9bf"
    }
  },
  "detect_id": "d204f195-7cbd-4402-9e9e-060269bff9bf",
  "gen_time": 1774188991723,
  "link": "https://app.limacharlie.io/orgs/d3541070-8b0e-4663-8a6a-aa0727aacd36/sensors/ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136/timeline?time=1774188991\u0026selected=65d916487d357c1d6130a84c69bff9bf",
  "namespace": "general",
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "da3caa39-0077-4ffa-9a1b-5b8c2c20388d",
    "event_time": 1774188991824,
    "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": -100,
    "moduleid": 2,
    "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
    "parent": "a2892b990a00e0ea9ee3602369bff6f3",
    "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"
    ],
    "target": "b2fe617fb2365f162bc5846069b1964d",
    "this": "65d916487d357c1d6130a84c69bff9bf"
  },
  "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": 1774188991000
}

{
  "virustotal": [
    {
      "malicious": false,
      "provider": "virustotal",
      "reputation": 0,
      "stats": {
        "confirmed-timeout": 0,
        "failure": 0,
        "harmless": 0,
        "malicious": 0,
        "suspicious": 0,
        "timeout": 0,
        "type-unsupported": 4,
        "undetected": 72
      }
    },
    {
      "malicious": false,
      "provider": "virustotal",
      "reputation": 10,
      "stats": {
        "confirmed-timeout": 0,
        "failure": 1,
        "harmless": 0,
        "malicious": 0,
        "suspicious": 0,
        "timeout": 0,
        "type-unsupported": 4,
        "undetected": 71
      }
    },
    {
      "malicious": false,
      "provider": "virustotal",
      "reputation": 0,
      "stats": {
        "confirmed-timeout": 0,
        "failure": 0,
        "harmless": 0,
        "malicious": 0,
        "suspicious": 0,
        "timeout": 0,
        "type-unsupported": 4,
        "undetected": 72
      }
    }
  ]
}

{
  "confidence": 0.925,
  "false_positive_reason": "Legitimate system binary running from expected location with valid signature and parent process chain",
  "investigation_questions": [
    "Is this part of normal Windows authentication activity?",
    "Are there any recent policy changes that might affect lsass.exe behavior?"
  ],
  "ioc_analysis": "lsass.exe is a critical Windows system binary responsible for handling authentication. The detected file path matches the known-good location (C:\\WINDOWS\\system32\\lsass.exe), the hash corresponds to the legitimate Microsoft-signed version, and FILE_IS_SIGNED indicates valid digital signature. The parent process wininit.exe is also a legitimate system process.",
  "iocs_extracted": [
    {
      "type": "file_path",
      "value": "C:\\WINDOWS\\system32\\lsass.exe"
    },
    {
      "type": "hash",
      "value": "055a1226a769948a79ed0972bdee2d91937c4b521e0b9046f9b8ccc63d110115"
    },
    {
      "type": "file_is_signed",
      "value": true
    }
  ],
  "mitre_techniques": [],
  "recommended_actions": [
    "Close case as false positive (unanimous AI verdict)",
    "Log the event for audit purposes only",
    "No immediate remediation required"
  ],
  "risk_score": 10,
  "severity": "informational",
  "summary": "**Vote: UNANIMOUS (2/2 -\u003e FALSE POSITIVE)**\n\n### \ud83e\udde0 dgx-122b Analysis (Primary)\nFailed or timed out.\n\n---\n\n### \ud83e\udd16 qwen3.5:4b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.95\nThe detection event flags lsass.exe access but the process is running from its expected location in System32 with a valid Microsoft signature and legitimate parent chain (wininit.exe). Historical analyst feedback consistently marks similar events as false positives.\n\n**IOC Analysis:** lsass.exe is a critical Windows system binary responsible for handling authentication. The detected file path matches the known-good location (C:\\WINDOWS\\system32\\lsass.exe), the hash corresponds to the legitimate Microsoft-signed version, and FILE_IS_SIGNED indicates valid digital signature. The parent process wininit.exe is also a legitimate system process.\n\n---\n\n### \ud83e\udd16 deepseek-r1:8b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.9\nThe detection event involves access to lsass.exe, a legitimate Windows system process located in the System32 directory. Given its signed status and SYSTEM privileges, this activity is consistent with normal system operations.\n\n**IOC Analysis:** The FILE_PATH \u0027C:\\WINDOWS\\system32\\lsass.exe\u0027 is a known Windows system binary in its expected location. The FILE_IS_SIGNED field indicates it is signed, and the hash matches a known Microsoft-signed binary, confirming it is likely benign. No malicious indicators are present.",
  "verdict": "false_positive",
  "voting": {
    "auto_action": "auto_close_fp",
    "mode": "unanimous",
    "total_models": 2,
    "vote_summary": [
      "qwen3.5:4b: false_positive (informational, 95% confidence)",
      "deepseek-r1:8b: false_positive (low, 90% confidence)"
    ],
    "votes": [
      {
        "confidence": 0.95,
        "model": "qwen3.5:4b",
        "verdict": "false_positive"
      },
      {
        "confidence": 0.9,
        "model": "deepseek-r1:8b",
        "verdict": "false_positive"
      }
    ],
    "winning_count": 2,
    "winning_verdict": "false_positive"
  }
}