MAL-2026-4258

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@engagehub/core/MAL-2026-4258.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-4258

Aliases

GHSA-5hgc-pmxv-3xh7

Published

2026-05-22T20:02:41Z

Modified

2026-07-07T14:01:46.015865988Z

Summary

Malicious code in @engagehub/core (npm)

Details

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

Source: amazon-inspector (bcc397ed87426726776c339f950939ac2da46c12edd018ed4bc48031f7044094)

All three lifecycle hooks (preinstall, install, postinstall) in package.json invoke node telemetry.js, so the payload fires unconditionally on npm install. telemetry.js gathers host context (OS, arch, Node version, pid) and CI-provider fingerprints by reading GITHUBACTIONS, AZUREDEVOPS, and JENKINS_HOME, hex-encodes a JSON blob, and exfiltrates it as chunked dns.lookup() queries whose subdomain labels carry the encoded data. The destination is built via string concatenation to evade scanners: "d82atu5fokal0459"+"5n00qkgj7qiyixx7a"+"."+"oa"+"st"+"."+"li"+"ve", resolving to a token under oast.live — an out-of-band interaction (interactsh) service commonly used by attackers as a covert DNS C2/exfil channel. The package additionally impersonates Microsoft (false Copyright (c) Microsoft Corporation header, fabricated github.com/microsoft/core repository URL, references to a nonexistent engdocs.microsoft.com docs site) under an UNLICENSED license to lend credibility to the dropper. Installing this package on a developer workstation or CI runner leaks host and CI-environment fingerprints to attacker-controlled infrastructure and confirms the package is reachable for follow-on targeting.

Source: ghsa-malware (475f83ab74065b1d60bff76bb28588e63ac7e7c634408dff7aa7fc2a343296f7)

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.

Source: ossf-package-analysis (326b05b76110daa7a72638fd81d726fb2ccb229f93e203e07aa236639b9120fa)

The OpenSSF Package Analysis project identified '@engagehub/core' @ 99.0.0 (npm) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.

Database specific

{
    "malicious-packages-origins": [
        {
            "versions": [
                "99.0.0"
            ],
            "modified_time": "2026-05-22T20:05:56Z",
            "import_time": "2026-05-22T20:36:48.234267082Z",
            "sha256": "326b05b76110daa7a72638fd81d726fb2ccb229f93e203e07aa236639b9120fa",
            "source": "ossf-package-analysis"
        },
        {
            "versions": [
                "99.0.0"
            ],
            "modified_time": "2026-05-22T20:02:42Z",
            "import_time": "2026-05-26T05:52:14.414325182Z",
            "id": "IN-MAL-2026-004252",
            "source": "amazon-inspector",
            "sha256": "00d2aa8784139f3335dd28e4b761b1f90459d3ff18f4e531d1f26287b05510be"
        },
        {
            "versions": [
                "99.0.0"
            ],
            "modified_time": "2026-05-22T20:02:41Z",
            "import_time": "2026-05-26T05:52:14.314767657Z",
            "sha256": "bcc397ed87426726776c339f950939ac2da46c12edd018ed4bc48031f7044094",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-004251"
        },
        {
            "sha256": "475f83ab74065b1d60bff76bb28588e63ac7e7c634408dff7aa7fc2a343296f7",
            "modified_time": "2026-07-07T13:51:34Z",
            "import_time": "2026-07-07T13:57:11.585274719Z",
            "id": "GHSA-5hgc-pmxv-3xh7",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "ghsa-malware"
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - actran@amazon.com
- OpenSSF: Package Analysis - FINDER
- - https://github.com/ossf/package-analysis
  - https://openssf.slack.com/channels/package_analysis

Affected packages

npm / @engagehub/core

Package

Name: @engagehub/core; View open source insights on deps.dev
Purl: pkg:npm/%40engagehub%2Fcore

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

99.*

99.0.0

Database specific

cwes

[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    },
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@engagehub/core/MAL-2026-4258.json"

indicators

{
    "package_integrity": [
        {
            "filename": "core-99.0.0.tgz",
            "hashes": {
                "sha512_sri": "sha512-UlqAfzQ9kUkpBMMKlyd9OPeRBuBBDxizwrZQ6oB8n2fAB+adcGx7HBzwvKdhWnbh6szEfGwb2o6MraRw5QIpwA==",
                "sha1": "294235300cccbb57558786500483d81984daf729"
            }
        }
    ],
    "domains": [
        "k.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p1.227473223a313737393438303134313031312c226f73223a22.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p4.77645f68617368223a302c22706964223a33347d.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "c.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p2.6c696e7578222c2261726368223a22783634222c2272756e74.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p1.227473223a313737393438303134323530352c226f73223a22.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p4.77645f68617368223a302c22706964223a34357d.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p0.7b22736368656d61223a312c22626964223a2230303133222c.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p1.227473223a313737393438303133383039322c226f73223a22.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p3.696d65223a227631382e32302e38222c226369223a302c2263.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live",
        "p4.77645f68617368223a302c22706964223a32337d.0013.d82atu5fokal04595n00qkgj7qiyixx7a.oast.live"
    ],
    "evidence_files": [
        {
            "sha256": "61c869a8ad4b842d6c5df56f9fe0d06286fb14a4d075dce87d5a8b6651dc221a",
            "path": "telemetry.js",
            "tlsh": "1851c65a6ee820281a62e0b8b51f5503f37993331b24f955e08fc3645fe75b851bcae2"
        },
        {
            "sha256": "21b71d8e400486993e1e437aabfc449c342bd90e7cbac74e9c50546b552981a3",
            "path": "package.json",
            "tlsh": "0a014228de280d272dd12aa299730181a3350d2b09043c083fc2021c8bcea6f52ff32d"
        }
    ]
}