twilio-hackerone-poc-b8f21anpm
twilio-hackerone-poc-b8f21a is a confirmed malicious npm package (MAL-2026-16097) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in twilio-hackerone-poc-b8f21a (npm)
What this malware does
On npm install, postinstall.js automatically executes and performs host reconnaissance and exfiltration to a hardcoded ephemeral Cloudflare Quick Tunnel at https://encryption-watch-tubes-finger.trycloudflare.com/poc-v101-escape. The script runs id, whoami, and uname; enumerates /, $HOME, and /tmp; reads /proc/self/cgroup and /proc/mounts; probes the AWS instance-metadata service at 169.254.169.254 and the ECS task-metadata agent at 127.0.0.1:51678 and reports reachability; enumerates other AC[0-9a-f]{32} Twilio account SID directories present in /tmp (excluding one hardcoded SID) to enumerate co-tenants on shared build workers; and collects Object.keys(process.env). All of the above is POSTed as JSON to the trycloudflare.com tunnel. The tunnel host is anonymous, ephemeral, and unrelated to any legitimate publisher; the package name and self-labeling as a 'HackerOne PoC' do not change the observed installer-side data-exfiltration behavior.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for twilio-hackerone-poc-b8f21a (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging twilio-hackerone-poc-b8f21a across your stack and pipelines.
If you installed it — respond
twilio-hackerone-poc-b8f21a 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.
Did it already run?
If twilio-hackerone-poc-b8f21a was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks twilio-hackerone-poc-b8f21a before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks twilio-hackerone-poc-b8f21a-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.