Malicious code in log-sink-testmetest (npm)

{
  "id": "c4077b78e13e358d21cdf3de0c830434ec41be4b01c1194b2a176901a956b074",
  "url": "https://osv.dev/vulnerability/MAL-2026-18179",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in log-sink-testmetest (npm)",
    "summary": "log-sink-testmetest 1.0.1 ships the credential stealer of data-pipeline-testmetest 2.0.1 and runs it on `npm install` without an install script: its `binding.gyp` source `/dev/null 2>&1; echo stub.c)` makes node-gyp run `index.js`, which decrypts `data.bin` and pipes it into Bun. The payload is identical to the one in event-emitter-testmetest 5.0.0. Published by npm account `testnewtestme2` on 2026-10-21; 1.0.0 is empty. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (b429dffb99ce1de5d5c43b4d59da752748d6400d53f36485ce9e78faaa6e6881) log-sink-testmetest@1.0.1 ships a binding.gyp that uses GYP command expansion `",
    "evidence": "osv:MAL-2026-18179",
    "products": [
      {
        "name": {
          "value": "log-sink-testmetest",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.0.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-18179",
      "aliases": [
        "MAL-2026-18179"
      ],
      "affected": [
        {
          "package": {
            "name": "log-sink-testmetest",
            "purl": "pkg:npm/log-sink-testmetest",
            "ecosystem": "npm"
          },
          "versions": [
            "1.0.1"
          ],
          "database_specific": {
            "cwes": [
              {
                "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."
              }
            ],
            "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/log-sink-testmetest/MAL-2026-18179.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "binding.gyp",
                  "tlsh": "5db09b5d75185e995cd448e0e1d4d94594e61577445a0540c5d6581166643045848b55",
                  "sha256": "98caee01817cc52eb5a2ca2307ec039a47ed771d2c34cd7a4b0d174f3423a6fa"
                },
                {
                  "path": "index.js",
                  "tlsh": "3c6262626b891ba561880cf6739d2503a690ec5f39b07b68ffd25557bd3d522bc20370",
                  "sha256": "f0f5586f86e4a432949e595c5c9f15c6588bf8a0f12f924dc3d6ce37e0419165"
                }
              ],
              "package_integrity": [
                {
                  "hashes": {
                    "sha1": "0f2e21873d92a8b0dbd8e8486ce5e4c0d6c26567",
                    "sha512_sri": "sha512-XL2pHc22N+kdrpLtKXnaeGMiLeAzHA9AZ490hu91RYqTcugTw//XCxjULzMtUBSVu2RtmVkQRdDglFNoyfuqAQ=="
                  },
                  "filename": "log-sink-testmetest-1.0.1.tgz"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-22T06:45:04.772939537Z",
      "provider": "osv",
      "references": [
        "https://www.npmjs.com/package/log-sink-testmetest/v/1.0.1"
      ],
      "provider_metadata": {
        "iocs": {
          "files": [
            {
              "note": "hidden install hook: node-gyp runs `env node index.js`",
              "paths": [
                "binding.gyp"
              ],
              "source": "PACKAGE_ARCHIVE",
              "digests": {
                "sha256": "98caee01817cc52eb5a2ca2307ec039a47ed771d2c34cd7a4b0d174f3423a6fa"
              }
            },
            {
              "note": "obfuscated loader that decrypts `data.bin` and pipes it into `bun run -`",
              "paths": [
                "index.js"
              ],
              "source": "PACKAGE_ARCHIVE",
              "digests": {
                "sha256": "f0f5586f86e4a432949e595c5c9f15c6588bf8a0f12f924dc3d6ce37e0419165"
              }
            },
            {
              "note": "AES-GCM-encrypted, gzipped stealer payload",
              "paths": [
                "data.bin"
              ],
              "source": "PACKAGE_ARCHIVE",
              "digests": {
                "sha256": "94f412c3f3e5b6a62be17dd70be471e5df6f2a86ed39cd53587e7c126b454cd8"
              }
            },
            {
              "note": "decrypted 948 KB Bun payload, identical to event-emitter-testmetest 5.0.0",
              "source": "IN_MEMORY",
              "digests": {
                "sha256": "ca312e76344ef3fd61f6b2c70004f18b2550e8685032a202d895760c87ccbb72"
              }
            }
          ]
        },
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021573",
            "sha256": "b429dffb99ce1de5d5c43b4d59da752748d6400d53f36485ce9e78faaa6e6881",
            "source": "amazon-inspector",
            "versions": [
              "1.0.1"
            ],
            "import_time": "2026-10-22T06:30:24.356478221Z",
            "modified_time": "2026-10-22T06:11:12Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 404568,
  "published_at": "2026-10-21T17:30:00+00:00"
}