MAL-2026-4644
Vulnerability from ossf_malicious_packages
Published
2026-05-24 15:52
Modified
2026-05-29 22:45
Summary
Malicious code in power-platform-playwright-toolkit (npm)
Details

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

Source: amazon-inspector (57967d58233d74f2fc4f9b0dee7c050370eb388050df8d63f29e719f83468d73)

On npm install, the package's postinstall script (postinstall.js) collects host identifiers and CI context — whoami, os.hostname(), os.platform(), cwd, CI, GITHUB_REPOSITORY, NODE_ENV — and sends them off the installer's machine via two channels: an HTTPS GET to 6v2j7oyzq0ehzolr4303sw1vwm2gqje8.oastify.com (a Burp Collaborator out-of-band callback host) at path /microsft?<querystring>, and a DNS lookup of <whoami>.6v2j7oyzq0ehzolr4303sw1vwm2gqje8.oastify.com to leak the username via DNS even when HTTPS egress is blocked. The package name impersonates Microsoft's Power Platform Playwright tooling namespace, and the exfil path token microsft (note the misspelling) serves as a campaign tag. The script self-describes as a 'security research canary' / 'Takeover By lobo', but installers have not consented to off-host data transmission and the captured data (GitHub repository identifier, CI flag, hostname, username) is direct reconnaissance value to whoever controls the OAST subdomain.

Source: ghsa-malware (737b1098ebca3d62e2482585023769cf25db3b912a8d31a3785466625169db1e)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

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.
Credits
Amazon Inspector actran@amazon.com

{
  "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"
          }
        ],
        "indicators": {
          "domains": [
            "scan.6v2j7oyzq0ehzolr4303sw1vwm2gqje8.oastify.com",
            "6v2j7oyzq0ehzolr4303sw1vwm2gqje8.oastify.com"
          ],
          "evidence_files": [
            {
              "path": "postinstall.js",
              "sha256": "99945e2b636233cef4ea216ed9cf9c2fa8575da508b336da9d872c66d96586d0",
              "tlsh": "f20119a023a4e6b498e21ec0a2248c06b127f0103240b8f078ac9254ab899b840b6cec"
            }
          ],
          "package_integrity": [
            {
              "filename": "power-platform-playwright-toolkit-1.0.4.tgz",
              "hashes": {
                "sha1": "c17134561028e6c32c1468fedb97198cda7ea968",
                "sha512_sri": "sha512-PbB3SQIdvTCMfzZobYMQBP3NJJE7XJLq6ZzyzLZ2Nc/WDUbUSP7fdUl0/+ypx7Yr+hmCNAxLLV8AYZOHLeN+BQ=="
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "npm",
        "name": "power-platform-playwright-toolkit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": [
        "1.0.4"
      ]
    }
  ],
  "aliases": [
    "GHSA-jwfr-3hmj-4r72"
  ],
  "credits": [
    {
      "contact": [
        "actran@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-004510",
        "import_time": "2026-05-26T05:52:44.736981054Z",
        "modified_time": "2026-05-24T15:52:30Z",
        "sha256": "57967d58233d74f2fc4f9b0dee7c050370eb388050df8d63f29e719f83468d73",
        "source": "amazon-inspector",
        "versions": [
          "1.0.4"
        ]
      },
      {
        "id": "IN-MAL-2026-004511",
        "import_time": "2026-05-26T05:52:44.833252081Z",
        "modified_time": "2026-05-24T15:52:31Z",
        "sha256": "8ab1bdec3fe9bee906e70e9d3b28aeb8a6884406eb913a96cf3d853bfa48fb1a",
        "source": "amazon-inspector",
        "versions": [
          "1.0.4"
        ]
      },
      {
        "id": "GHSA-jwfr-3hmj-4r72",
        "import_time": "2026-05-29T22:44:06.034796659Z",
        "modified_time": "2026-05-29T22:09:55Z",
        "ranges": [
          {
            "events": [
              {
                "introduced": "0"
              }
            ],
            "type": "SEMVER"
          }
        ],
        "sha256": "737b1098ebca3d62e2482585023769cf25db3b912a8d31a3785466625169db1e",
        "source": "ghsa-malware"
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (57967d58233d74f2fc4f9b0dee7c050370eb388050df8d63f29e719f83468d73)\nOn `npm install`, the package\u0027s postinstall script (postinstall.js) collects host identifiers and CI context \u2014 whoami, os.hostname(), os.platform(), cwd, CI, GITHUB_REPOSITORY, NODE_ENV \u2014 and sends them off the installer\u0027s machine via two channels: an HTTPS GET to `6v2j7oyzq0ehzolr4303sw1vwm2gqje8.oastify.com` (a Burp Collaborator out-of-band callback host) at path `/microsft?\u003cquerystring\u003e`, and a DNS lookup of `\u003cwhoami\u003e.6v2j7oyzq0ehzolr4303sw1vwm2gqje8.oastify.com` to leak the username via DNS even when HTTPS egress is blocked. The package name impersonates Microsoft\u0027s Power Platform Playwright tooling namespace, and the exfil path token `microsft` (note the misspelling) serves as a campaign tag. The script self-describes as a \u0027security research canary\u0027 / \u0027Takeover By lobo\u0027, but installers have not consented to off-host data transmission and the captured data (GitHub repository identifier, CI flag, hostname, username) is direct reconnaissance value to whoever controls the OAST subdomain.\n\n## Source: ghsa-malware (737b1098ebca3d62e2482585023769cf25db3b912a8d31a3785466625169db1e)\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.\n",
  "id": "MAL-2026-4644",
  "modified": "2026-05-29T22:45:23Z",
  "published": "2026-05-24T15:52:30Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://www.npmjs.com/package/power-platform-playwright-toolkit/v/1.0.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-jwfr-3hmj-4r72"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in power-platform-playwright-toolkit (npm)"
}


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