{
  "author": "ckeller@fusioncybersecurity.us",
  "cat": "New Code Atypical Path",
  "detect": {
    "event": {
      "FILE_PATH": "C:\\Windows\\Temp\\{B68467A3-8FC7-437C-AEF4-C476474575B2}\\.be\\VC_redist.x64.exe",
      "HASH": "568c9ba533624084ea18f7a562b4aa2249ed4e41281524a061a0d0b1008cf6bd",
      "PROCESS_ID": 11024
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "dc1781e5-37f9-49e5-aedb-176cb7f1e405",
      "event_time": 1774189036907,
      "event_type": "NEW_DOCUMENT",
      "ext_ip": "23.128.32.10",
      "hostname": "desktop-3nfb237",
      "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
      "int_ip": "192.168.50.40",
      "latency": 680,
      "moduleid": 2,
      "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
      "parent": "a859939381922e1b660e480269bff9e7",
      "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": "33d4a80f4c3a9555783380a669bff9ed"
    }
  },
  "detect_id": "2108649d-94e0-43b5-9f0f-5dd169bff9ed",
  "gen_time": 1774189037587,
  "link": "https://app.limacharlie.io/orgs/d3541070-8b0e-4663-8a6a-aa0727aacd36/sensors/ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136/timeline?time=1774189036\u0026selected=33d4a80f4c3a9555783380a669bff9ed",
  "namespace": "general",
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "dc1781e5-37f9-49e5-aedb-176cb7f1e405",
    "event_time": 1774189036907,
    "event_type": "NEW_DOCUMENT",
    "ext_ip": "23.128.32.10",
    "hostname": "desktop-3nfb237",
    "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
    "int_ip": "192.168.50.40",
    "latency": 680,
    "moduleid": 2,
    "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
    "parent": "a859939381922e1b660e480269bff9e7",
    "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": "33d4a80f4c3a9555783380a669bff9ed"
  },
  "source": "d3541070-8b0e-4663-8a6a-aa0727aacd36.b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175.ed8f7c3f-3a1a-493e-8fa4-35eb8c30b136.10000000.2",
  "source_rule": "general.NEW FILE WRITE BYTES SAMPLE GRAB",
  "ts": 1774189037000
}

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

{
  "confidence": 0.875,
  "false_positive_reason": "Microsoft Visual C++ Redistributable installers commonly use .be\\VC_redist.x64.exe naming and run from Temp directories during installation. This is standard behavior for legitimate software deployment.",
  "investigation_questions": [
    "What application or service triggered this VC_redist installer?",
    "Is there a known software update requiring Visual C++ redistributables on this host?",
    "Has this specific hash been seen in legitimate installations before?"
  ],
  "ioc_analysis": "The file .be\\VC_redist.x64.exe is a known Microsoft Visual C++ redistributable installer. While it resides in Temp (which can be suspicious), the naming convention and lack of malicious indicators suggest it is legitimate system software being installed by an application or update process.",
  "iocs_extracted": [
    {
      "type": "file_path",
      "value": "C:\\Windows\\Temp\\{B68467A3-8FC7-437C-AEF4-C476474575B2}\\\\.be\\VC_redist.x64.exe"
    },
    {
      "type": "hash",
      "value": "568c9ba533624084ea18f7a562b4aa2249ed4e41281524a061a0d0b1008cf6bd"
    }
  ],
  "mitre_techniques": [],
  "recommended_actions": [
    "Close case as false positive (unanimous AI verdict)",
    "Allow the process to complete its installation",
    "Monitor for subsequent suspicious behavior from this file",
    "Verify the parent process that initiated this installation"
  ],
  "risk_score": 15,
  "severity": "low",
  "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\nThis detection is a false positive because the file path indicates a legitimate Microsoft Visual C++ Redistributable installer running from a temporary directory, which is standard behavior for software installation.\n\n**IOC Analysis:** The file .be\\VC_redist.x64.exe is a known Microsoft Visual C++ redistributable installer. While it resides in Temp (which can be suspicious), the naming convention and lack of malicious indicators suggest it is legitimate system software being installed by an application or update process.\n\n---\n\n### \ud83e\udd16 deepseek-r1:8b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.8\nThe detection is likely a false positive as the file appears to be a Visual C++ Redistributable installer, which is commonly legitimate, despite the atypical file path in the Temp directory. The hash should be verified for Microsoft signatures to confirm benignity.\n\n**IOC Analysis:** The FILE_PATH is located in C:\\Windows\\Temp, which can be atypical and potentially suspicious, but VC_redist.x64.exe is a legitimate Microsoft installer for Visual C++ components. The HASH should be checked against known Microsoft-signed binaries; if signed by Microsoft, it is likely benign. The absence of malicious indicators and historical FP feedback supports this.",
  "verdict": "false_positive",
  "voting": {
    "auto_action": "auto_close_fp",
    "mode": "unanimous",
    "total_models": 2,
    "vote_summary": [
      "qwen3.5:4b: false_positive (low, 95% confidence)",
      "deepseek-r1:8b: false_positive (low, 80% confidence)"
    ],
    "votes": [
      {
        "confidence": 0.95,
        "model": "qwen3.5:4b",
        "verdict": "false_positive"
      },
      {
        "confidence": 0.8,
        "model": "deepseek-r1:8b",
        "verdict": "false_positive"
      }
    ],
    "winning_count": 2,
    "winning_verdict": "false_positive"
  }
}