MAL-2026-6737

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/epic-internal-tools/MAL-2026-6737.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-6737
Aliases
  • GHSA-wx8q-h5p5-9hcf
Published
2026-07-02T21:32:03Z
Modified
2026-07-10T03:31:47.317730936Z
Summary
Malicious code in epic-internal-tools (npm)
Details

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

Source: amazon-inspector (c8936b0c0d22097170c5eb02c9b183611934e59e7a3c97f94e3a269e13f0d4d5)

The package.json preinstall script auto-executes on npm install and performs installer-side reconnaissance and credential theft. It collects os.hostname(), username, cwd, platform, node version, npm user-agent, and CI indicators (GITHUBACTIONS, JENKINSURL, TEAMCITYVERSION, HORDEAGENT), then enumerates process.env and selects up to 30 variables matching credential-shaped patterns (AWS_, GITHUB_, GH_, NPM_, EPIC_, UE_, HORDE_, P4, CI, BUILD, TOKEN, KEY, SECRET). The collected JSON is POSTed over plain HTTP to a hardcoded bare-IP endpoint at http://109.123.247.172/npm/epicinternaltools. In parallel, it performs a DNS lookup against <host>-<user>.epicinternaltools.npm.epic-dc.oast.fun, using an interactsh-style out-of-band collector to smuggle host and user identifiers via DNS as a covert channel that bypasses HTTP egress filtering. The package name epic-internal-tools, the sentinel version 99999.0.0, and the Epic/Unreal/Horde/Perforce env-var targeting are the standard dependency-confusion pattern aimed at Epic Games internal build agents. Installing this package on a developer workstation or CI runner ships CI/cloud/registry credentials and host identity to attacker infrastructure.

Source: ghsa-malware (cf37416af81dba8f2b8a2d792aa6f190551237d659204e17e2698f69fbb6d1b7)

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 (8e96ac07cfb3a5132ff46542a6feca17f9b907b20596d713cd89063840ff2b47)

The OpenSSF Package Analysis project identified 'epic-internal-tools' @ 99999.0.0 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.
Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-07-02T21:55:02.673974355Z",
            "source": "ossf-package-analysis",
            "modified_time": "2026-07-02T21:32:03Z",
            "sha256": "8e96ac07cfb3a5132ff46542a6feca17f9b907b20596d713cd89063840ff2b47",
            "versions": [
                "99999.0.0"
            ]
        },
        {
            "import_time": "2026-07-08T17:01:32.924663178Z",
            "source": "amazon-inspector",
            "modified_time": "2026-07-08T16:29:05Z",
            "sha256": "c8936b0c0d22097170c5eb02c9b183611934e59e7a3c97f94e3a269e13f0d4d5",
            "id": "IN-MAL-2026-008130",
            "versions": [
                "99999.0.0"
            ]
        },
        {
            "import_time": "2026-07-10T03:23:39.569217486Z",
            "sha256": "cf37416af81dba8f2b8a2d792aa6f190551237d659204e17e2698f69fbb6d1b7",
            "modified_time": "2026-07-10T03:03:08Z",
            "source": "ghsa-malware",
            "id": "GHSA-wx8q-h5p5-9hcf",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ]
        }
    ]
}
References
Credits

Affected packages

npm / epic-internal-tools

Package

Name
epic-internal-tools
View open source insights on deps.dev
Purl
pkg:npm/epic-internal-tools

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

99999.*
99999.0.0

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/epic-internal-tools/MAL-2026-6737.json"
indicators 
{
    "evidence_files": [
        {
            "sha256": "5ee7d773676df0ac93b46ec338c2fbc2ef1609f47d3319d359a8d5b40e60b3e5",
            "tlsh": "f73172f5b639af7a1da14bd01630300292fafa5b3131c871bcb350572bc77345a62728",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "filename": "epic-internal-tools-99999.0.0.tgz",
            "hashes": {
                "sha1": "51da3aac2b04d7c572b0bd247a83bb914c970f56",
                "sha512_sri": "sha512-+cFFUmxcLoQaqYnkwihTXYPZsyrkSoWJB23NRrVcOYyiTUgvmmnA0f4Gvb7MBtWrnh4qrTg4WhCudkjhpeI03Q=="
            }
        }
    ]
}
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."
    }
]