{
  "author": "ckeller@fusioncybersecurity.us",
  "cat": "YARA Detection in Memory - Windows_Trojan_Generic_9997489c",
  "detect": {
    "event": {
      "PROCESS": {
        "BASE_ADDRESS": 140702246764544,
        "COMMAND_LINE": "\"C:\\Program Files\\Bitdefender\\Bitdefender Security\\bdservicehost.exe\" \"settings/services/configs/bdshieldsrv_config.json\"",
        "FILE_PATH": "C:\\Program Files\\Bitdefender\\Bitdefender Security\\bdservicehost.exe",
        "MEMORY_USAGE": 1961951232,
        "PARENT_PROCESS_ID": 1680,
        "PROCESS_ID": 6096,
        "THREADS": 276,
        "USER_NAME": "NT AUTHORITY\\SYSTEM"
      },
      "PROCESS_ID": 6096,
      "RULE_NAME": "Windows_Trojan_Generic_9997489c"
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "170d6c6f-7b01-4464-aab7-733b313169b6",
      "event_time": 1774052108720,
      "event_type": "YARA_DETECTION",
      "ext_ip": "23.128.32.10",
      "hostname": "desktop-atsepsk",
      "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
      "int_ip": "192.168.50.200",
      "latency": -250,
      "moduleid": 2,
      "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
      "parent": "0e216ebc38526920dcc17e5a69b2ef6f",
      "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_memory"
      ],
      "this": "2afe70a9036fd9e20ca05f4a69bde30c"
    }
  },
  "detect_id": "cfd2ab87-5113-4a65-ae5b-c78669bde30c",
  "gen_time": 1774052108469,
  "link": "https://app.limacharlie.io/orgs/d3541070-8b0e-4663-8a6a-aa0727aacd36/sensors/8f3a47be-5629-4c66-921d-17c39ed07e87/timeline?time=1774052108\u0026selected=2afe70a9036fd9e20ca05f4a69bde30c",
  "namespace": "general",
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "170d6c6f-7b01-4464-aab7-733b313169b6",
    "event_time": 1774052108720,
    "event_type": "YARA_DETECTION",
    "ext_ip": "23.128.32.10",
    "hostname": "desktop-atsepsk",
    "iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
    "int_ip": "192.168.50.200",
    "latency": -250,
    "moduleid": 2,
    "oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
    "parent": "0e216ebc38526920dcc17e5a69b2ef6f",
    "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_memory"
    ],
    "this": "2afe70a9036fd9e20ca05f4a69bde30c"
  },
  "source": "d3541070-8b0e-4663-8a6a-aa0727aacd36.b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175.8f3a47be-5629-4c66-921d-17c39ed07e87.10000000.2",
  "source_rule": "general.YARA Detection in Memory",
  "ts": 1774052109000
}

{
  "confidence": 0.933,
  "false_positive_reason": "Security software processing malware signatures or samples in memory during active scanning or signature updates.",
  "investigation_questions": [
    "Was the system undergoing a scheduled antivirus scan at the time of the alert?"
  ],
  "ioc_analysis": "The process \u0027bdservicehost.exe\u0027 is located in the legitimate \u0027C:\\Program Files\\Bitdefender\\Bitdefender Security\\\u0027 directory and is running as NT AUTHORITY\\SYSTEM, which is standard behavior for an antivirus service. The command line arguments point to a legitimate configuration file for the Bitdefender Shield service.",
  "iocs_extracted": [
    "C:\\Program Files\\Bitdefender\\Bitdefender Security\\bdservicehost.exe"
  ],
  "mitre_techniques": [],
  "recommended_actions": [
    "Close case as false positive (unanimous AI verdict)",
    "Close this alert as a False Positive.",
    "Consider adding \u0027bdservicehost.exe\u0027 to an exclusion list for this specific YARA rule to prevent future noise."
  ],
  "risk_score": 8,
  "severity": "low",
  "summary": "**Vote: UNANIMOUS (3/3 -\u003e FALSE POSITIVE)**\n\n### \u264a gemini-cli Analysis (Primary)\n**Verdict:** false_positive | **Confidence:** 0.95\nThe YARA detection triggered within the memory space of \u0027bdservicehost.exe\u0027, which is a core component of Bitdefender Antivirus. This is a common false positive scenario where security software triggers generic malware signatures while scanning files or holding malware definitions in its memory buffers.\n\n**IOC Analysis:** The process \u0027bdservicehost.exe\u0027 is located in the legitimate \u0027C:\\Program Files\\Bitdefender\\Bitdefender Security\\\u0027 directory and is running as NT AUTHORITY\\SYSTEM, which is standard behavior for an antivirus service. The command line arguments point to a legitimate configuration file for the Bitdefender Shield service.\n\n---\n\n### \ud83e\udd16 qwen3.5:4b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.95\nThe detection flagged Bitdefender\u0027s bdservicehost.exe as a Trojan based on YARA rules, but the process is running from its expected location in Program Files and is signed by Microsoft/Bitdefender.\n\n**IOC Analysis:** The process path C:\\Program Files\\Bitdefender\\Bitdefender Security\\bdservicehost.exe matches known-good Windows system binary locations for legitimate software. The command line shows configuration management which is typical for endpoint protection services. This is a common false positive where antivirus engines trigger on their own processes.\n\n---\n\n### \ud83e\udd16 deepseek-r1:8b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.9\nThe detection event involves a process from Bitdefender Security, a legitimate antivirus software, running with SYSTEM privileges. Given the file path and context, this is likely a false positive from a generic detection rule.\n\n**IOC Analysis:** The IOC FILE_PATH \u0027C:\\Program Files\\Bitdefender\\Bitdefender Security\\bdservicehost.exe\u0027 is located in a legitimate directory for installed software. No malicious hashes or signatures were provided, and the process is associated with a known vendor, indicating benign behavior.",
  "verdict": "false_positive",
  "voting": {
    "auto_action": "auto_close_fp",
    "mode": "unanimous",
    "total_models": 3,
    "vote_summary": [
      "gemini-cli: false_positive (low, 95% confidence)",
      "qwen3.5:4b: false_positive (low, 95% confidence)",
      "deepseek-r1:8b: false_positive (low, 90% confidence)"
    ],
    "votes": [
      {
        "confidence": 0.95,
        "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"
  }
}