Malicious code in datefmt-simple-utils (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7edc0c1f9cc25265504ab10c2634c3ea17e4028ff8412d4d7f4b22c41c33c3c9) datefmt-simple-utils presents itself as a date-formatting utility, but its package.json declares scripts.postinstall="node postinstall.js", which fires automatically on npm install. postinstall.js connects a TCP socket to the hardcoded remote host 8.135.48.40 on port 4444 and attaches an interactive /bin/bash to that socket, giving the remote endpoint full command execution on the installer's machine. Three fallback techniques target the same host: a python3 pty.spawn reverse shell, a python3 subprocess-based variant, and a Node net.connect + spawn('/bin/bash', ['-i']) variant. The advertised date-formatting purpose is a cover story; no such functionality is wired into the install-time code path.
Malicious code in datefmt-simple-utils (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7edc0c1f9cc25265504ab10c2634c3ea17e4028ff8412d4d7f4b22c41c33c3c9) datefmt-simple-utils presents itself as a date-formatting utility, but its package.json declares scripts.postinstall="node postinstall.js", which fires automatically on npm install. postinstall.js connects a TCP socket to the hardcoded remote host 8.135.48.40 on port 4444 and attaches an interactive /bin/bash to that socket, giving the remote endpoint full command execution on the installer's machine. Three fallback techniques target the same host: a python3 pty.spawn reverse shell, a python3 subprocess-based variant, and a Node net.connect + spawn('/bin/bash', ['-i']) variant. The advertised date-formatting purpose is a cover story; no such functionality is wired into the install-time code path.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-14032
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a7f43f1bf8831d5395d77c0
Added to database: 08/14/2026, 16:36:01 UTC
Last updated: 08/14/2026, 16:36:58 UTC
Views: 1
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