{
  "author": "_soteria-rules-edr-926e2197-189b-4d89-9675-c8993933dc9a[bulk][segment]",
  "cat": "00087-NIX-Touch_Timestomping",
  "detect": {
    "event": {
      "COMMAND_LINE": "touch -r /snap/snapd-desktop-integration/315/gnome-platform /home/dfusion/snap/snapd-desktop-integration/common/.cache/desktop-runtime-date",
      "FILE_PATH": "/usr/bin/touch",
      "HASH": "8b0047b0de380f0bac3855400263214e33fbc2995b5637e9104a9de3f738ec82",
      "PARENT": {
        "COMMAND_LINE": "/bin/bash /snap/snapd-desktop-integration/315/snap/command-chain/desktop-launch /snap/snapd-desktop-integration/315/usr/bin/snapd-desktop-integration",
        "FILE_PATH": "/usr/bin/bash",
        "HASH": "bc5945feb8bd26203ebfafea5ce1878bb2e32cb8fb50ab7ae395cfb1e1aaaef1",
        "MEMORY_USAGE": 12333056,
        "PARENT_ATOM": "e5bb613c7b053b7c1f30874269bf1428",
        "PARENT_PROCESS_ID": 3859,
        "PROCESS_ID": 3882,
        "THIS_ATOM": "207e7328d24ff53a6094819b69bf1429",
        "THREADS": 1,
        "TIMESTAMP": 1774130216387,
        "USER_ID": 1000,
        "USER_NAME": "dfusion"
      },
      "PARENT_PROCESS_ID": 3882,
      "PROCESS_ID": 4083,
      "USER_ID": 1000,
      "USER_NAME": "dfusion"
    },
    "routing": {
      "arch": 2,
      "did": "",
      "event_id": "5cb7eb1c-cccf-4494-8adf-840b9ee68d44",
      "event_time": 1774130216557,
      "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": 621,
      "moduleid": 2,
      "oid": "ad19afae-3759-4207-b06e-8648b225c455",
      "parent": "207e7328d24ff53a6094819b69bf1429",
      "plat": 536870912,
      "sid": "04e68799-92b7-411a-9abf-293a59ff94df",
      "tags": [],
      "this": "a7f85aafdfbbc72b5216235369bf1429"
    }
  },
  "detect_id": "26497235-f007-42eb-a58d-1f8269bf1429",
  "detect_mtd": {
    "description": "Touch is a Unix tool used to create empty files and modify time stamps. Timestomping is a technique that modifies the timestamps of a file for defense evasion and antiforensics. Adversaries may use Touch to modify timestamps of malicious files.",
    "falsepositives": [
      "System Administrators may legitimately use Touch to modify a file\u0027s timestamp for reason such as source control approaches to storage usage analysis."
    ],
    "references": [
      "https://www.elastic.co/guide/en/security/current/timestomping-using-touch-command.html",
      "https://attack.mitre.org/techniques/T1070/006/",
      "https://redcanary.com/blog/rocke-cryptominer/",
      "http://man7.org/linux/man-pages/man1/touch.1.html"
    ],
    "tags": [
      "attack.tA0005",
      "attack.t1070",
      "attack.t1070.006"
    ]
  },
  "gen_time": 1774130217179,
  "link": "https://app.limacharlie.io/orgs/ad19afae-3759-4207-b06e-8648b225c455/sensors/04e68799-92b7-411a-9abf-293a59ff94df/timeline?time=1774130216\u0026selected=a7f85aafdfbbc72b5216235369bf1429",
  "namespace": "general",
  "priority": 2,
  "routing": {
    "arch": 2,
    "did": "",
    "event_id": "5cb7eb1c-cccf-4494-8adf-840b9ee68d44",
    "event_time": 1774130216557,
    "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": 621,
    "moduleid": 2,
    "oid": "ad19afae-3759-4207-b06e-8648b225c455",
    "parent": "207e7328d24ff53a6094819b69bf1429",
    "plat": 536870912,
    "sid": "04e68799-92b7-411a-9abf-293a59ff94df",
    "tags": [],
    "this": "a7f85aafdfbbc72b5216235369bf1429"
  },
  "rule_tags": [
    "ext:soteria-rules-edr",
    "attack.tA0005",
    "attack.t1070",
    "attack.t1070.006"
  ],
  "source": "ad19afae-3759-4207-b06e-8648b225c455.47501359-645e-4049-906e-e6195da7afcf.04e68799-92b7-411a-9abf-293a59ff94df.20000000.2",
  "source_rule": "service.NIX-Touch_Timestomping",
  "ts": 1774130217000
}

{
  "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": 0.933,
  "false_positive_reason": "Legitimate system administration or application behavior (Snap package cache management).",
  "investigation_questions": [
    "Is snapd-desktop-integration a standard package on this host?",
    "Does this specific snap update frequently, causing recurring alerts?"
  ],
  "ioc_analysis": "The process /usr/bin/touch is a legitimate system binary. The command line shows a reference file (/snap/snapd-desktop-integration/315/gnome-platform) and a target file (/home/dfusion/snap/snapd-desktop-integration/common/.cache/desktop-runtime-date), both within expected Snap directories. No malicious intent is indicated.",
  "iocs_extracted": [
    "/usr/bin/touch",
    "8b0047b0de380f0bac3855400263214e33fbc2995b5637e9104a9de3f738ec82"
  ],
  "mitre_techniques": [
    "T1070.006"
  ],
  "recommended_actions": [
    "Close case as false positive (unanimous AI verdict)",
    "Whitelist the snapd-desktop-integration desktop-launch script for the NIX-Touch_Timestomping rule.",
    "Monitor for touch commands modifying system binaries outside of /home or /snap directories."
  ],
  "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 detection triggered on a Snap package (snapd-desktop-integration) using the \u0027touch -r\u0027 command to synchronize a cache file\u0027s timestamp with its runtime platform. This is standard behavior for the snapd desktop-launch wrapper script to ensure proper cache management.\n\n**IOC Analysis:** The process /usr/bin/touch is a legitimate system binary. The command line shows a reference file (/snap/snapd-desktop-integration/315/gnome-platform) and a target file (/home/dfusion/snap/snapd-desktop-integration/common/.cache/desktop-runtime-date), both within expected Snap directories. No malicious intent is indicated.\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 process /usr/bin/touch is a legitimate Linux system utility located in its expected directory and executed by a standard user.\n\n**IOC Analysis:** The file path /usr/bin/touch matches known-good Linux system binary locations. The command line shows a common use case for timestamp manipulation within a Snap application environment, not indicative of timestomping attacks. The process is running under the user \u0027dfusion\u0027 with no signs of privilege escalation.\n\n---\n\n### \ud83e\udd16 deepseek-r1:8b Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.9\nThe detection event involves the \u0027touch\u0027 command on a Linux system, likely part of legitimate system or application maintenance related to snap packages. The command is copying timestamps from a snap-related file to a user\u0027s cache directory, which is common in benign scenarios.\n\n**IOC Analysis:** The FILE_PATH \u0027/usr/bin/touch\u0027 is a standard Linux command utility, not a malicious binary. The COMMAND_LINE uses legitimate paths related to snap packages, indicating normal operation. The HASH corresponds to a standard touch binary, and the process tree shows a benign parent process (/bin/bash), reducing the likelihood of malicious intent.",
  "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"
  }
}