mal-2026-4288
Vulnerability from ossf_malicious_packages
Published
2026-05-21 18:52
Modified
2026-05-26 05:55
Summary
Malicious code in @jaggle/resizeobserves (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (3fe4b050d79ecfc702c9222cf3347e49d4530efd23a2120ee040ef32e0a76e4f)

Package name impersonates the popular @juggle/resize-observer (j→j substitution and pluralized 'resizeobserves') and the README is copied verbatim from the legitimate package, but the tarball ships an unrelated Python module (clipboard_guardian) that has nothing to do with a ResizeObserver polyfill. The postinstall hook (npm-install.cjs) bootstraps Python and pip on the installer's machine — attempting privileged installs via sudo -n / pkexec apt-get / pacman / dnf, falling back to fetching get-pip.py from bootstrap.pypa.io — then runs pip install --break-system-packages on the bundled clipper, and finally writes a persistent autostart entry under a disguised name: a systemd user unit python3-dbus-helper.service on Linux, a com.apple.python.runtime.plist LaunchAgent on macOS, or an HKCU\...\Run\PyRuntimeBroker value on Windows. Once running, clipboard_guardian/guardian.py monitors the user's clipboard, matches outgoing content against regexes for 40+ blockchains, and silently replaces any detected wallet address with one of the attacker's hardcoded wallets (e.g., ethereum 0x450c0E58Fc2ba03632d3F5780ad8C966648B6F18, bitcoin bc1qs2mpls4p0f7fng073gy2rcdgjpf7la4eugpt6y, plus monero/etc.) — any crypto payment the victim copies is redirected to the attacker. The daemon further disguises itself via setproctitle('python3-dbus-helper' / 'com.apple.python.runtime') and SetConsoleTitleW('Python Runtime Broker') to blend with OS components, ships an anti-clipper cover story in pyproject.toml while being the clipper itself, and contains an is_monitor_running() routine that pauses substitution when task managers / process explorers (taskmgr, procexp, procmon, ProcessHacker, Activity Monitor, htop, btop, gnome-system-monitor, etc.) are detected. The combination of typosquat naming, install-time privileged persistence, hardcoded attacker wallets, and explicit anti-analysis logic makes intent unambiguous.

Source: ossf-package-analysis (954b112d434a28b13673c4ee516cd4f348148683727ee498290bbd5666a8262b)

The OpenSSF Package Analysis project identified '@jaggle/resizeobserves' @ 1.0.11 (npm) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.
CWE
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
  • CWE-506 - The product contains code that appears to be malicious in nature.
Credits
Amazon Inspector actran@amazon.com
OpenSSF: Package Analysis github.com/ossf/package-analysis openssf.slack.com/channels/package_analysis
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          },
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          }
        ],
        "indicators": {
          "domains": [
            "bootstrap.pypa.io"
          ],
          "evidence_files": [
            {
              "path": "clipboard_guardian/guardian.py",
              "sha256": "3cde686b9001cb99f18f9c0e92b0e01985849d22f2dee2bd891a7c9e3e164d8c",
              "tlsh": "ae727404e965dc63c2d2644a0c92c4a276a46fab5d1424787ffec13c9f9e13fb0b926d"
            },
            {
              "path": "npm-install.cjs",
              "sha256": "de03198c52dbe627954d5761ff3439f7a75eb98de48084784ae272312d83a520",
              "tlsh": "a8422a8592b5a97cc8f3a26e6687542b01558c1f3601f89cb9bea0dc1f0b139437b73e"
            }
          ],
          "package_integrity": [
            {
              "filename": "resizeobserves-1.0.17.tgz",
              "hashes": {
                "sha1": "5e0904abd2397cb5ef9029f7bec09e8b5136722d",
                "sha512_sri": "sha512-KWRLPAWjwEcxHg5jFZEtjSBgZC8XkiJ+juG3kEyFi/iod5RfpYKYvRy+37AON0SvcrrKTq+3YPAMI4Yb9nBrjw=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "@jaggle/resizeobserves"
      },
      "versions": [
        "1.0.11",
        "1.0.10",
        "1.0.19",
        "1.0.15",
        "1.0.14",
        "1.0.18",
        "1.0.17",
        "1.0.20",
        "1.0.4",
        "1.0.6",
        "1.0.9",
        "1.0.12",
        "1.0.8",
        "1.0.5",
        "1.0.16",
        "1.0.0",
        "1.0.13",
        "1.0.1",
        "1.0.3",
        "1.0.2"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "actran@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    },
    {
      "contact": [
        "https://github.com/ossf/package-analysis",
        "https://openssf.slack.com/channels/package_analysis"
      ],
      "name": "OpenSSF: Package Analysis",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
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        "modified_time": "2026-05-24T20:52:53Z",
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        "source": "ossf-package-analysis",
        "versions": [
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        ]
      },
      {
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        ]
      },
      {
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        ]
      },
      {
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        "modified_time": "2026-05-25T12:45:48Z",
        "sha256": "74a40f9bd9c9682d2fdbb798a9e2a54c1754c6613b9dfddff6b9c3f863f247dd",
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      {
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      {
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      {
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      {
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      {
        "id": "IN-MAL-2026-004626",
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      {
        "id": "IN-MAL-2026-004645",
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        ]
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      {
        "id": "IN-MAL-2026-004023",
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        "modified_time": "2026-05-21T20:48:28Z",
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      {
        "id": "IN-MAL-2026-004013",
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      {
        "id": "IN-MAL-2026-004638",
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        "sha256": "02c7b406290c7efd201e29823c92dceb170c6f57e3f0bdad2b0fd59d761188f7",
        "source": "amazon-inspector",
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      {
        "id": "IN-MAL-2026-004547",
        "import_time": "2026-05-26T05:52:48.89803773Z",
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      {
        "id": "IN-MAL-2026-004641",
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      {
        "id": "IN-MAL-2026-004533",
        "import_time": "2026-05-26T05:52:47.436801963Z",
        "modified_time": "2026-05-24T19:13:50Z",
        "sha256": "a047b30fbc6c1a622558d5a29750dd866792684624d58554b9145b45d8c62b41",
        "source": "amazon-inspector",
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      {
        "id": "IN-MAL-2026-003996",
        "import_time": "2026-05-26T05:51:43.992319817Z",
        "modified_time": "2026-05-21T18:52:14Z",
        "sha256": "fb7f2be52f543dcfe6db161ffb821f2bb6dc223b40a348b0ba63fca7e7e5ac2d",
        "source": "amazon-inspector",
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        ]
      },
      {
        "id": "IN-MAL-2026-004548",
        "import_time": "2026-05-26T05:52:49.013576182Z",
        "modified_time": "2026-05-24T20:04:32Z",
        "sha256": "1420857f1462236e1b513058e2484125c0ee7cd23d1dcc912ead72b091666f12",
        "source": "amazon-inspector",
        "versions": [
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        ]
      },
      {
        "id": "IN-MAL-2026-004627",
        "import_time": "2026-05-26T05:52:58.604098967Z",
        "modified_time": "2026-05-25T11:24:06Z",
        "sha256": "3fed4f7fe21ce2bb85632c3e9cbdce384405b1e0ffa90a4cce6c6892949a462b",
        "source": "amazon-inspector",
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      },
      {
        "id": "IN-MAL-2026-004642",
        "import_time": "2026-05-26T05:53:00.351271779Z",
        "modified_time": "2026-05-25T12:31:00Z",
        "sha256": "5c22947421db551622c67432fd7b0e31be51b1abf27be10428d50f214a88c76d",
        "source": "amazon-inspector",
        "versions": [
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        ]
      },
      {
        "id": "IN-MAL-2026-004646",
        "import_time": "2026-05-26T05:53:00.839657826Z",
        "modified_time": "2026-05-25T13:02:06Z",
        "sha256": "af3f0147bbe2bf539d07ed5ff4d87cfb48371e475a036446e0047f868f79a2b0",
        "source": "amazon-inspector",
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      },
      {
        "id": "IN-MAL-2026-004549",
        "import_time": "2026-05-26T05:52:49.117041023Z",
        "modified_time": "2026-05-24T20:04:33Z",
        "sha256": "e827ed2c866108e66aea77b3a29e262b81e5478ab8e1f417b3c887a546b74d65",
        "source": "amazon-inspector",
        "versions": [
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        ]
      },
      {
        "id": "IN-MAL-2026-004628",
        "import_time": "2026-05-26T05:52:58.738983651Z",
        "modified_time": "2026-05-25T11:24:06Z",
        "sha256": "30bad6ddd8174d17900c76c426ccb52de581a0e0315ab617ae1ab42bfac755ff",
        "source": "amazon-inspector",
        "versions": [
          "1.0.13"
        ]
      },
      {
        "id": "IN-MAL-2026-004005",
        "import_time": "2026-05-26T05:51:45.178028932Z",
        "modified_time": "2026-05-21T19:57:09Z",
        "sha256": "5ea81ffbf8e98f57c0d1aded321f8d8741237ee40406b14e45f52c409efd0bc5",
        "source": "amazon-inspector",
        "versions": [
          "1.0.1"
        ]
      },
      {
        "id": "IN-MAL-2026-004011",
        "import_time": "2026-05-26T05:51:45.983210856Z",
        "modified_time": "2026-05-21T20:06:29Z",
        "sha256": "783639df35ba04992e9b90da1cb1f5e633e54cb512b3dbfba1f24a2c3d802951",
        "source": "amazon-inspector",
        "versions": [
          "1.0.3"
        ]
      },
      {
        "id": "IN-MAL-2026-004644",
        "import_time": "2026-05-26T05:53:00.628902394Z",
        "modified_time": "2026-05-25T12:53:24Z",
        "sha256": "e028569d5ebf339a4c773e476fcc7e33ab72b70d05800d9241332d0099cf503f",
        "source": "amazon-inspector",
        "versions": [
          "1.0.17"
        ]
      },
      {
        "id": "IN-MAL-2026-004625",
        "import_time": "2026-05-26T05:52:58.371355685Z",
        "modified_time": "2026-05-25T10:43:04Z",
        "sha256": "fdb55c86e5c9fedbbf5db819602022eb1e38c960ebe310f7b6c6cdd8800e8f5b",
        "source": "amazon-inspector",
        "versions": [
          "1.0.12"
        ]
      },
      {
        "id": "IN-MAL-2026-004631",
        "import_time": "2026-05-26T05:52:59.066892583Z",
        "modified_time": "2026-05-25T11:36:19Z",
        "sha256": "3fe4b050d79ecfc702c9222cf3347e49d4530efd23a2120ee040ef32e0a76e4f",
        "source": "amazon-inspector",
        "versions": [
          "1.0.14"
        ]
      },
      {
        "id": "IN-MAL-2026-004639",
        "import_time": "2026-05-26T05:53:00.039623963Z",
        "modified_time": "2026-05-25T12:22:00Z",
        "sha256": "edb4b079e79cdefe07e22c2347dc34bc9c59276c69a6c584add6697e2007fcf7",
        "source": "amazon-inspector",
        "versions": [
          "1.0.15"
        ]
      },
      {
        "id": "IN-MAL-2026-004008",
        "import_time": "2026-05-26T05:51:45.653813964Z",
        "modified_time": "2026-05-21T20:00:02Z",
        "sha256": "f7babc0b69b160ebbe7d00ec0be02d03aa5d96f2506406a35ac9d10a7477399f",
        "source": "amazon-inspector",
        "versions": [
          "1.0.2"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (3fe4b050d79ecfc702c9222cf3347e49d4530efd23a2120ee040ef32e0a76e4f)\nPackage name impersonates the popular @juggle/resize-observer (j\u2192j substitution and pluralized \u0027resizeobserves\u0027) and the README is copied verbatim from the legitimate package, but the tarball ships an unrelated Python module (clipboard_guardian) that has nothing to do with a ResizeObserver polyfill. The postinstall hook (npm-install.cjs) bootstraps Python and pip on the installer\u0027s machine \u2014 attempting privileged installs via sudo -n / pkexec apt-get / pacman / dnf, falling back to fetching get-pip.py from bootstrap.pypa.io \u2014 then runs `pip install --break-system-packages` on the bundled clipper, and finally writes a persistent autostart entry under a disguised name: a systemd user unit `python3-dbus-helper.service` on Linux, a `com.apple.python.runtime.plist` LaunchAgent on macOS, or an `HKCU\\...\\Run\\PyRuntimeBroker` value on Windows. Once running, clipboard_guardian/guardian.py monitors the user\u0027s clipboard, matches outgoing content against regexes for 40+ blockchains, and silently replaces any detected wallet address with one of the attacker\u0027s hardcoded wallets (e.g., ethereum 0x450c0E58Fc2ba03632d3F5780ad8C966648B6F18, bitcoin bc1qs2mpls4p0f7fng073gy2rcdgjpf7la4eugpt6y, plus monero/etc.) \u2014 any crypto payment the victim copies is redirected to the attacker. The daemon further disguises itself via setproctitle(\u0027python3-dbus-helper\u0027 / \u0027com.apple.python.runtime\u0027) and SetConsoleTitleW(\u0027Python Runtime Broker\u0027) to blend with OS components, ships an `anti-clipper` cover story in pyproject.toml while being the clipper itself, and contains an is_monitor_running() routine that pauses substitution when task managers / process explorers (taskmgr, procexp, procmon, ProcessHacker, Activity Monitor, htop, btop, gnome-system-monitor, etc.) are detected. The combination of typosquat naming, install-time privileged persistence, hardcoded attacker wallets, and explicit anti-analysis logic makes intent unambiguous.\n\n## Source: ossf-package-analysis (954b112d434a28b13673c4ee516cd4f348148683727ee498290bbd5666a8262b)\nThe OpenSSF Package Analysis project identified \u0027@jaggle/resizeobserves\u0027 @ 1.0.11 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package executes one or more commands associated with malicious behavior.\n",
  "id": "MAL-2026-4288",
  "modified": "2026-05-26T05:55:01Z",
  "published": "2026-05-21T18:52:14Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.17"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.20"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.4"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.10"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.6"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.18"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.8"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.5"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.15"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.16"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.9"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.11"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.13"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.1"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.3"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.12"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.14"
    },
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/@jaggle/resizeobserves/v/1.0.2"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in @jaggle/resizeobserves (npm)"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.