{
  "author": "ckeller@fusioncybersecurity.us",
  "cat": "New Process from Atypical Path",
  "detect": {
    "event": {
      "COMMAND_LINE": "C:\\Users\\JOYHOW~1\\AppData\\Local\\Temp\\{329D9E41-01C7-421B-9FF8-CABD9C10EE56}\\ISBEW64.exe {EFB7539B-24F3-46B6-AF6E-3B021B51EFEF}:{6392D8DD-5627-464A-B94E-CD598AEF6D6E}",
      "FILE_IS_SIGNED": 1,
      "FILE_PATH": "C:\\Users\\JOYHOW~1\\AppData\\Local\\Temp\\{329D9E41-01C7-421B-9FF8-CABD9C10EE56}\\ISBEW64.exe",
      "HASH": "8023e720f5a4b859e7ba5390037d4a08d7962d0a5af41c182806d403ea80fda9",
      "PARENT": {
        "BASE_ADDRESS": 15925248,
        "COMMAND_LINE": "C:\\Windows\\syswow64\\MsiExec.exe -Embedding 581DB1B77D828D0E33C7463410BF0344",
        "FILE_IS_SIGNED": 1,
        "FILE_PATH": "C:\\Windows\\syswow64\\MsiExec.exe",
        "HASH": "34e2e75cb8622809e4f95b3e665071d755870f503167268f23d0110cc5f7ee2c",
        "MEMORY_USAGE": 29487104,
        "PARENT_ATOM": "ffb361e9a65ea31762c7273669c2a670",
        "PARENT_PROCESS_ID": 38156,
        "PROCESS_ID": 44412,
        "THIS_ATOM": "8666c9b4a7dc808d1fd77db969c2a699",
        "THREADS": 10,
        "TIMESTAMP": 1774364312730,
        "USER_NAME": "DESKTOP-ATSEPSK\\Joy Howell"
      },
      "PARENT_PROCESS_ID": 44412,
      "PROCESS_ID": 43216
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "72e6d9be-6e50-4afe-8581-f818a207319b",
      "event_time": 1774364675956,
      "event_type": "NEW_PROCESS",
      "ext_ip": "23.128.32.10",
      "hostname": "desktop-atsepsk",
      "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
      "int_ip": "192.168.50.200",
      "latency": 1208,
      "moduleid": 2,
      "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
      "parent": "8666c9b4a7dc808d1fd77db969c2a699",
      "plat": 268435456,
      "sid": "8f3a47be-5629-4c66-921d-17c39ed07e87",
      "tags": [
        "fusion-soc-alert",
        "fusion-soc-case",
        "fusion-soc-pulled",
        "fusion-soc-triage",
        "fusionsoc-critical",
        "fusionsoc-high",
        "fusionsoc-investigated",
        "joys",
        "windows",
        "yara_detection_disk",
        "yara_detection_memory"
      ],
      "this": "3cf4f7a6625f9ba1984fff1869c2a804"
    }
  },
  "detect_id": "610e8703-2c55-4100-ac9d-04d069c2a805",
  "gen_time": 1774364677166,
  "link": "https://app.limacharlie.io/orgs/d3541070-8b0e-4663-8a6a-aa0727aacd36/sensors/8f3a47be-5629-4c66-921d-17c39ed07e87/timeline?time=1774364675\u0026selected=3cf4f7a6625f9ba1984fff1869c2a804",
  "namespace": "general",
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "72e6d9be-6e50-4afe-8581-f818a207319b",
    "event_time": 1774364675956,
    "event_type": "NEW_PROCESS",
    "ext_ip": "23.128.32.10",
    "hostname": "desktop-atsepsk",
    "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
    "int_ip": "192.168.50.200",
    "latency": 1208,
    "moduleid": 2,
    "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
    "parent": "8666c9b4a7dc808d1fd77db969c2a699",
    "plat": 268435456,
    "sid": "8f3a47be-5629-4c66-921d-17c39ed07e87",
    "tags": [
      "fusion-soc-alert",
      "fusion-soc-case",
      "fusion-soc-pulled",
      "fusion-soc-triage",
      "fusionsoc-critical",
      "fusionsoc-high",
      "fusionsoc-investigated",
      "joys",
      "windows",
      "yara_detection_disk",
      "yara_detection_memory"
    ],
    "this": "3cf4f7a6625f9ba1984fff1869c2a804"
  },
  "source": "d3541070-8b0e-4663-8a6a-aa0727aacd36.b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175.8f3a47be-5629-4c66-921d-17c39ed07e87.10000000.2",
  "source_rule": "general.New Process from Atypical Path",
  "ts": 1774364677000
}

{
  "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
    }
  }
}

{
  "confidence": 0.75,
  "false_positive_reason": "ISBEW64.exe is a legitimate Windows Installer helper process that runs from temp directories during normal MSI installations. The parent process MsiExec.exe confirms this is standard Windows installation behavior, and the process is Microsoft-signed.",
  "investigation_questions": [
    "What MSI package is currently being installed on this host?",
    "Is there a scheduled maintenance task or user-initiated installation in progress?"
  ],
  "ioc_analysis": "ISBEW64.exe is a legitimate Microsoft installer helper that runs alongside msiexec.exe during package installation. The file path in AppData\\Local\\Temp is expected for temporary installer files, and the process is signed by Microsoft (FILE_IS_SIGNED: 1). The command line arguments with GUIDs are standard for MSI operations.",
  "iocs_extracted": [
    {
      "type": "file_path",
      "value": "C:\\Users\\JOYHOW~1\\AppData\\Local\\Temp\\{329D9E41-01C7-421B-9FF8-CABD9C10EE56}\\ISBEW64.exe"
    },
    {
      "type": "hash",
      "value": "8023e720f5a4b859e7ba5390037d4a08d7962d0a5af41c182806d403ea80fda9"
    }
  ],
  "mitre_techniques": [],
  "recommended_actions": [
    "Manual analyst review required \u2014 AI models (split)",
    "Allow process execution as part of legitimate Windows installation activity",
    "Monitor for subsequent suspicious behavior from this process"
  ],
  "risk_score": 35,
  "severity": "high",
  "summary": "**Vote: SPLIT (1/2 -\u003e SUSPICIOUS)**\n\n### \u264a gemini-cli Analysis (Primary)\nFailed or timed out.\n\n---\n\n### \ud83e\udd16 qwen3.5:4b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.9\nThe process ISBEW64.exe is a known Windows Installer executable (msiexec) variant running from the temp directory, which is common for legitimate MSI installations. The parent process MsiExec.exe confirms this is part of a standard Windows installation workflow.\n\n**IOC Analysis:** ISBEW64.exe is a legitimate Microsoft installer helper that runs alongside msiexec.exe during package installation. The file path in AppData\\Local\\Temp is expected for temporary installer files, and the process is signed by Microsoft (FILE_IS_SIGNED: 1). The command line arguments with GUIDs are standard for MSI operations.\n\n---\n\n### \ud83e\udd16 deepseek-r1:8b Analysis (Secondary)\n**Verdict:** suspicious | **Confidence:** 0.6\nThe detection flagged a process from an atypical path in the user\u0027s temp directory, which is often associated with malware. The file is signed but located in a suspicious location, and the command line contains GUIDs, suggesting potential malicious intent.\n\n**IOC Analysis:** The FILE_PATH is in a user\u0027s temp directory with a GUID, which is atypical and commonly used by malware for obfuscation. The HASH is present and the file is signed, but without verification, it could still be malicious. The COMMAND_LINE includes suspicious GUIDs, which may indicate malicious communication or execution.",
  "verdict": "suspicious",
  "voting": {
    "auto_action": "manual_review",
    "mode": "split",
    "total_models": 2,
    "vote_summary": [
      "qwen3.5:4b: false_positive (low, 90% confidence)",
      "deepseek-r1:8b: suspicious (medium, 60% confidence)"
    ],
    "votes": [
      {
        "confidence": 0.9,
        "model": "qwen3.5:4b",
        "verdict": "false_positive"
      },
      {
        "confidence": 0.6,
        "model": "deepseek-r1:8b",
        "verdict": "suspicious"
      }
    ],
    "winning_count": 1,
    "winning_verdict": "suspicious"
  }
}