registry / Credential exfiltration / @npmresearch4/bench-cbb7
@npmresearch4/bench-cbb7
Authorized security-research probe. Contact nicholas@curran.tech.
This report shows the evidence for @npmresearch4/bench-cbb7@1.0.0, the only known version.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThe package contains concrete, automatic install-time credential theft and remote exfiltration behavior, with additional cloud-database probing. Its research label does not remove the unconsented attack chain.
Static reason
One or more suspicious static signals were detected.
Trigger
npm preinstall or postinstall on a non-Windows host
Impact
Compromises ECS/AWS credentials and environment metadata; can access and mutate a configured DynamoDB table under the victim role.
Mechanism
install-time credential harvesting, cloud-permission probing, and HTTPS exfiltration
Attack narrative
During npm installation, `run.js` collects environment, host, container, and network details. If ECS credentials are available, it queries the link-local credential endpoint and stores the access key, secret key, and token. It also executes a Python `boto3` script to enumerate, read, and test write/update/delete access against `DYNAMO_TABLE`, then POSTs the gathered data to a third-party Cloudflare tunnel.
AI rationale
The package contains concrete, automatic install-time credential theft and remote exfiltration behavior, with additional cloud-database probing. Its research label does not remove the unconsented attack chain.
Evidence
package.jsonrun.jsREADME.md/.dockerenv/proc/1/cgroup/proc/1/cmdline/proc/mounts/proc/self/status/var/run/docker.sock/entrypoint.sh/proc/1/fd/255/tmp/pkg//tmp/pkg/node_modules/
Network endpoints2
169.254.170.2curves-highly-arbor-displayed.trycloudflare.com/beacon
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- `package.json` runs `node run.js` in both `preinstall` and `postinstall`.
- `run.js` fetches ECS task-role credentials from `169.254.170.2`, including secret key and token.
- `run.js` collects AWS environment credentials, host/user/network data, and container/process details.
- `run.js` runs shell commands to inspect mounts, capabilities, entrypoint data, and package directories.
- `run.js` executes a Python DynamoDB permission audit that reads table records and attempts writes, updates, and deletes.
- `run.js` POSTs the collected payload to `curves-highly-arbor-displayed.trycloudflare.com`.
Evidence against
- No AI-agent control-surface files or configuration writes were found.
- No secondary payload download or dynamic code-loading path was found.
Behavioral surface
ChildProcessEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
4 flagged · loading sourcepackage.jsonView file
•scripts.preinstall = node run.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkgrun.jsView file
13const https = require('https');
L14: const { exec } = require('child_process');
L15:
High
11const path = require('path');
L12: const http = require('http');
L13: const https = require('https');
L14: const { exec } = require('child_process');
L15:
...
L25: const MARKER = 'tss-linux-july-2026';
L26: const PHASE = process.env.npm[redacted] || 'run';
L27:
High
Same File Env Network Execution
A single source file combines environment access, network access, and code or shell execution; review context before blocking.
run.jsView on unpkg · L11Findings
4 High3 Medium3 Low
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processrun.js
HighSame File Env Network Executionrun.js
HighCloud Metadata Accessrun.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to @npmresearch4/bench-cbb7@1.0.0.
The versions list below shows the verdict for each recorded version.
- Avoid installing @npmresearch4/bench-cbb7@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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