{
  "author": "_soteria-rules-edr-926e2197-189b-4d89-9675-c8993933dc9a[bulk][segment]",
  "cat": "00326-NIX-Host_Based_Firewall_Disabled",
  "detect": {
    "event": {
      "COMMAND_LINE": "/usr/sbin/iptables -F ufw-logging-allow",
      "FILE_PATH": "/usr/sbin/xtables-nft-multi",
      "HASH": "a1610dd70bb5ab04180671280df65b0077b680b627c0b6c51480b327732a762d",
      "PARENT": {
        "COMMAND_LINE": "/usr/bin/python3 /usr/sbin/ufw enable",
        "FILE_PATH": "/usr/bin/python3.12",
        "HASH": "8295ee25cfdb239f3e165afceda7f46de73e2b606ff0e2e3d8623e3facd30acc",
        "MEMORY_USAGE": 16281600,
        "PARENT_PROCESS_ID": 114528,
        "PROCESS_ID": 114529,
        "THIS_ATOM": "48add28300d7fec91063c11e69ca0248",
        "THREADS": 1,
        "TIMESTAMP": 1774846535516,
        "USER_ID": 0,
        "USER_NAME": "root"
      },
      "PARENT_PROCESS_ID": 114529,
      "PROCESS_ID": 114649,
      "USER_ID": 0,
      "USER_NAME": "root"
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "f1346683-d647-42c0-b226-8f55589fbc97",
      "event_time": 1774846540047,
      "event_type": "NEW_PROCESS",
      "ext_ip": "67.60.122.240",
      "hostname": "fusionserver",
      "iid": "47501359-645e-4049-906e-e6195da7afcf",
      "int_ip": "192.168.1.6",
      "latency": 1570,
      "moduleid": 2,
      "oid": "ad19afae-3759-4207-b06e-8648b225c455",
      "parent": "48add28300d7fec91063c11e69ca0248",
      "plat": 536870912,
      "sid": "04e68799-92b7-411a-9abf-293a59ff94df",
      "tags": [
        "fusion-soc-case",
        "fusion-soc-pulled",
        "fusion-soc-triage"
      ],
      "this": "9e56f7fd9ab476fb165ce57869ca024c"
    }
  },
  "detect_id": "a9dc113f-a886-419f-99be-1bb269ca024d",
  "detect_mtd": {
    "description": "Iptables, Firewalld, and UFW are builtin firewall implementations in Linux distributions. Adversaries may disable the firewall in order to bypass controls of network use.",
    "falsepositives": [
      "System Administrators may infrequently disable or stop the firewall to troubleshoot issues."
    ],
    "references": [
      "https://attack.mitre.org/techniques/T1562/004/",
      "https://threatpost.com/six-malicious-linux-shell-scripts-how-to-stop-them/168127/",
      "https://www.cyberciti.biz/faq/linux-howto-disable-remove-firewall/"
    ],
    "tags": [
      "attack.t1562",
      "attack.t1562.004"
    ]
  },
  "gen_time": 1774846541617,
  "link": "https://app.limacharlie.io/orgs/ad19afae-3759-4207-b06e-8648b225c455/sensors/04e68799-92b7-411a-9abf-293a59ff94df/timeline?time=1774846540\u0026selected=9e56f7fd9ab476fb165ce57869ca024c",
  "namespace": "general",
  "priority": 2,
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "f1346683-d647-42c0-b226-8f55589fbc97",
    "event_time": 1774846540047,
    "event_type": "NEW_PROCESS",
    "ext_ip": "67.60.122.240",
    "hostname": "fusionserver",
    "iid": "47501359-645e-4049-906e-e6195da7afcf",
    "int_ip": "192.168.1.6",
    "latency": 1570,
    "moduleid": 2,
    "oid": "ad19afae-3759-4207-b06e-8648b225c455",
    "parent": "48add28300d7fec91063c11e69ca0248",
    "plat": 536870912,
    "sid": "04e68799-92b7-411a-9abf-293a59ff94df",
    "tags": [
      "fusion-soc-case",
      "fusion-soc-pulled",
      "fusion-soc-triage"
    ],
    "this": "9e56f7fd9ab476fb165ce57869ca024c"
  },
  "rule_tags": [
    "attack.t1562.004",
    "attack.t1562",
    "ext:soteria-rules-edr"
  ],
  "source": "ad19afae-3759-4207-b06e-8648b225c455.47501359-645e-4049-906e-e6195da7afcf.04e68799-92b7-411a-9abf-293a59ff94df.20000000.2",
  "source_rule": "service.NIX-Host_Based_Firewall_Disabled",
  "ts": 1774846541000
}

{
  "virustotal": {
    "malicious": false,
    "provider": "virustotal",
    "reputation": 0,
    "stats": {
      "confirmed-timeout": 0,
      "failure": 0,
      "harmless": 0,
      "malicious": 0,
      "suspicious": 0,
      "timeout": 0,
      "type-unsupported": 11,
      "undetected": 65
    }
  }
}

{
  "confidence": 0.95,
  "false_positive_reason": "Parent process is ufw enable, indicating legitimate firewall configuration rather than disabling. Historical data shows 100% FP rate for this pattern.",
  "investigation_questions": [
    "Was this change authorized by the system administrator?",
    "Is UFW currently active on this host?"
  ],
  "ioc_analysis": "The binary /usr/sbin/xtables-nft-multi is a standard Linux networking utility located in a system directory. The command line \u0027iptables -F ufw-logging-allow\u0027 is consistent with UFW chain initialization during enablement. Historical data confirms this pattern is a known false positive.",
  "iocs_extracted": [
    "/usr/sbin/xtables-nft-multi",
    "/usr/sbin/iptables -F ufw-logging-allow",
    "a1610dd70bb5ab04180671280df65b0077b680b627c0b6c51480b327732a762d"
  ],
  "mitre_techniques": [
    "T1562.004"
  ],
  "recommended_actions": [
    "Manual analyst review required \u2014 AI models (majority)",
    "Verify UFW status on the host",
    "Mark rule as false positive for this host if confirmed legitimate"
  ],
  "risk_score": 10,
  "severity": "high",
  "summary": "**Vote: MAJORITY (1/1 -\u003e FALSE POSITIVE)**\n\n### \ud83e\udde0 dgx-122b Analysis (Primary)\n**Verdict:** false_positive | **Confidence:** 0.95\nThe process is part of the legitimate UFW enablement workflow on Linux. The parent process explicitly runs \u0027ufw enable\u0027, indicating administrative configuration rather than malicious disabling of protections.\n\n**IOC Analysis:** The binary /usr/sbin/xtables-nft-multi is a standard Linux networking utility located in a system directory. The command line \u0027iptables -F ufw-logging-allow\u0027 is consistent with UFW chain initialization during enablement. Historical data confirms this pattern is a known false positive.\n\n---\n\n### \ud83e\udd16 qwen3.5:4b Analysis (Secondary)\nFailed or timed out.\n\n---\n\n### \ud83e\udd16 deepseek-r1:14b Analysis (Secondary)\nFailed or timed out.\n\n---\n\n### \ud83e\udd16 gemma3:4b Analysis (Secondary)\nFailed or timed out.",
  "verdict": "false_positive",
  "voting": {
    "auto_action": "manual_review",
    "mode": "majority",
    "total_models": 1,
    "vote_summary": [
      "dgx-122b: false_positive (low, 95% confidence)"
    ],
    "votes": [
      {
        "confidence": 0.95,
        "model": "dgx-122b",
        "verdict": "false_positive"
      }
    ],
    "winning_count": 1,
    "winning_verdict": "false_positive"
  }
}