{"answers":{"affected":"1 open source package ship an affected version, including @tonsdk/core.","exploited":"There is no known exploitation of MAL-2026-5564 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-5564 is a malicious package in @tonsdk/core, published on 11 Jun 2026."},"fix_prompt":"MAL-2026-5564 is a malicious package: @tonsdk/core (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-5564/ (Markdown: https://insights.sbomify.com/MAL-2026-5564/index.md)","id":"MAL-2026-5564","markdown":"https://insights.sbomify.com/MAL-2026-5564/index.md","name":"MAL-2026-5564","record":{"aliases":["GHSA-hw5x-gw43-m4mx"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"@tonsdk/core impersonates the legitimate @ton/core TON blockchain SDK. On `npm install`, scripts/postinstall.js executes automatically and performs two attacker-controlled actions against a hardcoded bare-IP C2 at 213.218.160.189 (ports 8080 and 80) over plaintext HTTP. First, it base64-encodes a JSON fingerprint of the installer host — hostname, username, platform, arch — and sends it as a GET query string to `/s?q=\u003cbase64\u003e`, leaking host identifiers on every install. Second, it fetches a response payload, optionally XOR-decrypts it, and passes the result to eval(), giving the operator arbitrary remote code execution in the installer's Node process. The script also probes for VM/sandbox/analyst tooling (vmtoolsd, vboxservice, wireshark, x64dbg, ida) to suppress execution in researcher environments. The package description and name target developers searching for TON SDK tooling; the repository URL (`aspect-build/tonsdk`) is unrelated to the real TON foundation.\n\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.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in @tonsdk/core (npm)","id":"MAL-2026-5564","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":[],"package":"@tonsdk/core","purl":"pkg:npm/%40tonsdk/core","source":"MAL-2026-5564"}],"products":null,"published":"2026-06-11","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-5564/"}