Vulnerability-Lookup

PYSEC-2026-611

Vulnerability from pysec - Published: 2026-07-01 22:17 - Updated: 2026-07-01 22:17

Details

Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08, malicious phantom releases of uprobe were published to PyPI using stolen credentials. The package executes a bundled JavaScript payload (via the Bun runtime) on import that harvests and exfiltrates credentials and attempts self-propagation. This entry is a summary; behavior may not be fully characterized here. See the linked references for detailed analysis and indicators of compromise.

Impacted products

Name	purl
uprobe	pkg:pypi/uprobe

Aliases

MAL-2026-5279

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "uprobe",
        "purl": "pkg:pypi/uprobe"
      },
      "versions": [
        "0.1.3",
        "0.1.4"
      ]
    }
  ],
  "aliases": [
    "MAL-2026-5279"
  ],
  "details": "Part of the \"Hades\" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08,\nmalicious phantom releases of uprobe were published to PyPI using stolen\ncredentials. The package executes a bundled JavaScript payload (via the Bun\nruntime) on import that harvests and exfiltrates credentials and attempts\nself-propagation. This entry is a summary; behavior may not be fully\ncharacterized here. See the linked references for detailed analysis and\nindicators of compromise.\n",
  "id": "PYSEC-2026-611",
  "modified": "2026-07-01T22:17:57Z",
  "published": "2026-07-01T22:17:57Z",
  "references": [
    {
      "type": "EVIDENCE",
      "url": "https://inspector.pypi.io/project/uprobe/0.1.4/packages/df/31/a03ea8534bdad483ba856f85ff57aaccc642d432388c55b046d45a788c59/uprobe-0.1.4-py3-none-any.whl//uprobe-setup.pth"
    },
    {
      "type": "ARTICLE",
      "url": "https://www.endorlabs.com/learn/shai-hulud-hades-wave-hits-six-pypi-bioinformatics-packages"
    },
    {
      "type": "ARTICLE",
      "url": "https://www.stepsecurity.io/blog/the-hades-campaign-pypi-packages"
    }
  ],
  "summary": "Malicious code in uprobe (PyPI)"
}

mal-2026-5279

Vulnerability from ossf_malicious_packages

Published

2026-06-06 06:13

Modified

2026-06-12 19:46

Summary

Malicious code in uprobe (PyPI)

Details

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

Source: amazon-inspector (82230ac4ef4464e9696491bf25cfabbd5cff78ab2256f4aa1a0d5ad7456218a8)

The package installs uprobe-setup.pth, which Python auto-loads at every interpreter startup in any environment where the wheel is present. The.pth contents alias stdlib modules to single-underscore short names (_O, _T, _o, _s, _u, _p, _y, _g, _zf) and wrap the payload in exec('...') gated by a /tmp/.bun_ran sentinel. The payload globs for a sibling _index.js under the package directory, downloads the Bun JavaScript runtime ZIP from https://github.com/oven-sh/bun/releases/download/bun-v1.3.13/bun-{platform}-{arch}.zip to /tmp/b/bun, chmods it 0o775, and invokes subprocess.run([bun, 'run', _index.js]). This is an alternate-runtime dropper: a foreign runtime is fetched and used to execute bundled JavaScript that is opaque to any Python-side review. The behavior fires unconditionally on python startup (not just on explicit tool invocation), runs outside pip's build isolation, and the obfuscation + exec-on-string + sentinel-gated one-shot pattern is canonical evasion shape. The advertised purpose of the package (a FISH-probe design tool) has no need for a JavaScript runtime.

Source: kam193 (d6d0df66bf8ff6eaf447d14185b7df7a06bafc9cea9de3611a2dcc594cf97ec3)

Versions 0.1.3, 0.1.4 were compromised.

Compromised packages start an obfuscated infostealer. The infostealer is a heavily obfuscated JavaScript code executed using Bun runtime on Python startup. It collectes all kinds of sensitive data, including API keys, credentials to package repositories, cryptocurrency assets, password manager data. Infostealer actively queries online services to collect additional secrets as well as attempts to gain persistence and spread further by publishing infected packages using collected credentials. Data are exfiltrated likely using Github. The code seems to threaten to wipe the user's data if it detects invalid GitHub tokens. Cleanup should be done with caution.

It seems to be related to the recent Mini Shai Hulud campaign.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-06-compr-woodpecker

Reasons (based on the campaign):

compromised-package
exfiltration-env-variables
exfiltration-cloud-tokens
exfiltration-credentials
abuses-pth
obfuscation
infostealer
The package contains code to detect if it is running in a sandbox environment.
exfiltration-crypto
files-exfiltration
destructive-actions

CWE

CWE-506 - The product contains code that appears to be malicious in nature.

Credits

Amazon Inspector inspector-research@amazon.com

Kamil Mańkowski (kam193) github.com/kam193 bad-packages.kam193.eu/

JSON

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"
          }
        ],
        "indicators": {
          "evidence_files": [
            {
              "path": "uprobe-setup.pth",
              "sha256": "c539766062555d47716f8432e73adbe3a0c0c954a0b6c4005017a668975e275c",
              "tlsh": "4911c02e429385b0d975d646830b19f4afdb8ce28fc79506c8d8d4c1a7b2e50e3b7684"
            }
          ],
          "package_integrity": [
            {
              "filename": "uprobe-0.1.3-py3-none-any.whl",
              "hashes": {
                "blake2b_256": "b3ec75821f73b07968399276f171ef5d530233d5ff57e4b6176f9e0262de5daa",
                "md5": "7fa239f814d0289c68f8f5dfb6962c4c",
                "sha256": "2f8657749353a7ea2751c1512ac5094d09b521755c8de4e64d0a00bab97d453e"
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "uprobe"
      },
      "versions": [
        "0.1.3",
        "0.1.4"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    },
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "REPORTER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "pypi/2026-06-compr-woodpecker/uprobe",
        "import_time": "2026-06-06T06:39:40.988389339Z",
        "modified_time": "2026-06-06T06:13:57Z",
        "sha256": "d6d0df66bf8ff6eaf447d14185b7df7a06bafc9cea9de3611a2dcc594cf97ec3",
        "source": "kam193",
        "versions": [
          "0.1.3",
          "0.1.4"
        ]
      },
      {
        "id": "pypi/2026-06-compr-woodpecker/uprobe",
        "import_time": "2026-06-08T11:41:02.544720254Z",
        "modified_time": "2026-06-06T06:13:57Z",
        "sha256": "02b7567cd774d6780ea2e17f295b042043da278a26c56bea68de3be11af8124e",
        "source": "kam193",
        "versions": [
          "0.1.3",
          "0.1.4"
        ]
      },
      {
        "id": "pypi/2026-06-compr-woodpecker/uprobe",
        "import_time": "2026-06-08T19:19:19.200791766Z",
        "modified_time": "2026-06-06T06:14:57Z",
        "sha256": "db54d108bd753874f71a747bdcfa43d5e16c8072b3c714b5235347baff6c909f",
        "source": "kam193",
        "versions": [
          "0.1.3",
          "0.1.4"
        ]
      },
      {
        "id": "pypi/2026-06-compr-woodpecker/uprobe",
        "import_time": "2026-06-09T07:48:29.657559701Z",
        "modified_time": "2026-06-06T06:14:57Z",
        "sha256": "03b84f52160acea137aec2451d06813fde42d1e814aad504e9741eb3ca2bc2c4",
        "source": "kam193",
        "versions": [
          "0.1.3",
          "0.1.4"
        ]
      },
      {
        "id": "IN-MAL-2026-006083",
        "import_time": "2026-06-12T19:44:06.269422778Z",
        "modified_time": "2026-06-12T19:08:25Z",
        "sha256": "82230ac4ef4464e9696491bf25cfabbd5cff78ab2256f4aa1a0d5ad7456218a8",
        "source": "amazon-inspector",
        "versions": [
          "0.1.3"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (82230ac4ef4464e9696491bf25cfabbd5cff78ab2256f4aa1a0d5ad7456218a8)\nThe package installs `uprobe-setup.pth`, which Python auto-loads at every interpreter startup in any environment where the wheel is present. The.pth contents alias stdlib modules to single-underscore short names (`_O`, `_T`, `_o`, `_s`, `_u`, `_p`, `_y`, `_g`, `_zf`) and wrap the payload in `exec(\u0027...\u0027)` gated by a `/tmp/.bun_ran` sentinel. The payload globs for a sibling `_index.js` under the package directory, downloads the Bun JavaScript runtime ZIP from `https://github.com/oven-sh/bun/releases/download/bun-v1.3.13/bun-{platform}-{arch}.zip` to `/tmp/b/bun`, chmods it 0o775, and invokes `subprocess.run([bun, \u0027run\u0027, _index.js])`. This is an alternate-runtime dropper: a foreign runtime is fetched and used to execute bundled JavaScript that is opaque to any Python-side review. The behavior fires unconditionally on `python` startup (not just on explicit tool invocation), runs outside pip\u0027s build isolation, and the obfuscation + exec-on-string + sentinel-gated one-shot pattern is canonical evasion shape. The advertised purpose of the package (a FISH-probe design tool) has no need for a JavaScript runtime.\n\n## Source: kam193 (d6d0df66bf8ff6eaf447d14185b7df7a06bafc9cea9de3611a2dcc594cf97ec3)\nVersions 0.1.3, 0.1.4 were compromised.\n\n\nCompromised packages start an obfuscated infostealer. The infostealer is a heavily obfuscated JavaScript code executed using Bun runtime on Python startup. It collectes all kinds of sensitive data, including API keys, credentials to package repositories, cryptocurrency assets, password manager data. Infostealer actively queries online services to collect additional secrets as well as attempts to gain persistence and spread further by publishing infected packages using collected credentials. Data are exfiltrated likely using Github. The code seems to threaten to wipe the user\u0027s data if it detects invalid GitHub tokens. Cleanup should be done with caution.\n\nIt seems to be related to the recent Mini Shai Hulud campaign.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-06-compr-woodpecker\n\n\nReasons (based on the campaign):\n\n\n - compromised-package\n\n\n - exfiltration-env-variables\n\n\n - exfiltration-cloud-tokens\n\n\n - exfiltration-credentials\n\n\n - abuses-pth\n\n\n - obfuscation\n\n\n - infostealer\n\n\n - The package contains code to detect if it is running in a sandbox environment.\n\n\n - exfiltration-crypto\n\n\n - files-exfiltration\n\n\n - destructive-actions\n",
  "id": "MAL-2026-5279",
  "modified": "2026-06-12T19:46:18Z",
  "published": "2026-06-06T06:13:57Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://socket.dev/blog/mini-shai-hulud-campaign-hits-red-hat-cloud-services-npm-packages"
    },
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/campaign/2026-06-compr-woodpecker"
    },
    {
      "type": "WEB",
      "url": "https://socket.dev/blog/shai-hulud-descends-to-hades-miasma-pypi-wave"
    },
    {
      "type": "WEB",
      "url": "https://o3.security/blog/pypi-supply-chain-attack-pth-file-miasma"
    },
    {
      "type": "WEB",
      "url": "https://socket.dev/blog/mini-shai-hulud-miasma-and-hades-worms-target-bioinformatics-and-mcp-developers-via-malicious"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/uprobe/0.1.3/"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in uprobe (PyPI)"
}

Sightings

Author	Source	Type	Date

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.

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