{
  "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-caps-testye_rwc6o",
      "FILE_PATH": "/usr/sbin/xtables-nft-multi",
      "HASH": "a1610dd70bb5ab04180671280df65b0077b680b627c0b6c51480b327732a762d",
      "PARENT_PROCESS_ID": 114412,
      "PROCESS_ID": 114417,
      "USER_ID": 0,
      "USER_NAME": "root"
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "eaaf5796-23e1-4457-a221-05c9bbbf4e41",
      "event_time": 1774846303724,
      "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": 9054,
      "moduleid": 2,
      "oid": "ad19afae-3759-4207-b06e-8648b225c455",
      "plat": 536870912,
      "sid": "04e68799-92b7-411a-9abf-293a59ff94df",
      "tags": [
        "fusion-soc-case",
        "fusion-soc-pulled",
        "fusion-soc-triage"
      ],
      "this": "451b87c5f88c754cee6dde4269ca0160"
    }
  },
  "detect_id": "77a13e57-a55e-4d29-9350-7bc069ca0168",
  "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": 1774846312778,
  "link": "https://app.limacharlie.io/orgs/ad19afae-3759-4207-b06e-8648b225c455/sensors/04e68799-92b7-411a-9abf-293a59ff94df/timeline?time=1774846303\u0026selected=451b87c5f88c754cee6dde4269ca0160",
  "namespace": "general",
  "priority": 2,
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "eaaf5796-23e1-4457-a221-05c9bbbf4e41",
    "event_time": 1774846303724,
    "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": 9054,
    "moduleid": 2,
    "oid": "ad19afae-3759-4207-b06e-8648b225c455",
    "plat": 536870912,
    "sid": "04e68799-92b7-411a-9abf-293a59ff94df",
    "tags": [
      "fusion-soc-case",
      "fusion-soc-pulled",
      "fusion-soc-triage"
    ],
    "this": "451b87c5f88c754cee6dde4269ca0160"
  },
  "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": 1774846312000
}

{
  "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
    }
  }
}

{
  "_model_name": "dgx-122b",
  "_primary_summary": "### \ud83e\udde0 dgx-122b Analysis (Primary)\n**Verdict:** false_positive | **Confidence:** 0.95\nThe event involves a legitimate Linux system binary (xtables-nft-multi) executed by root to manage firewall rules. Historical data for this specific pattern shows a 100% false positive rate (8/8), indicating benign administrative activity.\n\n**IOC Analysis:** The file path /usr/sbin/xtables-nft-multi is a standard location for iptables/nftables utilities on Linux systems. The command line indicates a firewall rule flush operation, which requires root privileges. The random chain name suggests a scripted maintenance task rather than malicious activity.",
  "confidence": 0.95,
  "false_positive_reason": "Known benign pattern: Legitimate system binary executed by root for firewall management. Historical data shows 8/8 previous alerts were false positives.",
  "investigation_questions": [
    "Was this firewall flush part of an approved change request?",
    "Which automation tool or script triggered the UFW chain modification?"
  ],
  "ioc_analysis": "The file path /usr/sbin/xtables-nft-multi is a standard location for iptables/nftables utilities on Linux systems. The command line indicates a firewall rule flush operation, which requires root privileges. The random chain name suggests a scripted maintenance task rather than malicious activity.",
  "iocs_extracted": [
    "/usr/sbin/xtables-nft-multi",
    "a1610dd70bb5ab04180671280df65b0077b680b627c0b6c51480b327732a762d"
  ],
  "mitre_techniques": [
    "T1562.004"
  ],
  "recommended_actions": [
    "Mark alert as false positive in SIEM",
    "Verify firewall change management logs for approval",
    "No containment or remediation required"
  ],
  "risk_score": 15,
  "severity": "low",
  "summary": "The event involves a legitimate Linux system binary (xtables-nft-multi) executed by root to manage firewall rules. Historical data for this specific pattern shows a 100% false positive rate (8/8), indicating benign administrative activity.",
  "verdict": "false_positive"
}