NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
Malicious package

simple-date-formatter-new-6npm

Advisory published Updated

simple-date-formatter-new-6 is a confirmed malicious npm package (MAL-2026-12197) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in simple-date-formatter-new-6 (npm)

MAL-2026-12197
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall simple-date-formatter-new-6

What this malware does

package.json declares a postinstall script that runs a shell pipeline collecting host identifiers (uname, id), routing and ARP tables, TCP-probe results against internal hosts, cloud instance metadata from 169.254.169.254, and PID 1 cmdline, then POSTs the aggregated output over plain HTTP to safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo10 (an interact.sh OAST callback host). A sibling postinstall.js enumerates ~/.ssh and POSTs a JSON payload including username, platform, and.pub filenames to the hardcoded IP 124.221.154.135:443/post. Both behaviors fire as install-time side effects and provide the publisher with reconnaissance data and cloud-credential-adjacent metadata from any host that runs npm install on this package.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

fcbd38bc87a61131881784bb9e919a03a4cfa2f69934fd17e3735b34ce75e3f6

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for simple-date-formatter-new-6 (version 1.0.0).

  2. If you installed it — respond

    simple-date-formatter-new-6 is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If simple-date-formatter-new-6 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. simple-date-formatter-new-6 on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-014425

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks simple-date-formatter-new-6-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
simple-date-formatter-new-6 (npm) malicious package — MAL-2026-12197 | O3 Security