sheratan_haha
This report shows the evidence for sheratan_haha@1.0.1. 2 of 2 known versions are blocked or flagged. See all versions.
OpenSSF/OSV Malicious Advisory
imported 4mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-5739 confirms this npm version as malicious.
Advisory
MAL-2026-5739
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in sheratan_haha (npm)
Details
On `npm install`, the package's declared postinstall hook (`node postinstall.js`) runs `whoami` on the installer's machine and POSTs the output to a hardcoded webhook.site endpoint (`https://webhook.site/0ea9eb45-3ede-4cf0-9ea9-2b8d700272e7`) via `https.request`. The package advertises itself as 'A simple date formatting utility' but ships no library code consistent with that purpose — the only behavior on install is host fingerprinting and exfiltration to an attacker-controlled URL. Metadata is placeholder-shaped (empty author, generic description, name `sheratan_haha`), consistent with a dependency-confusion / recon PoC. Installing this package leaks the installer's OS username to an external endpoint controlled by the publisher.
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to sheratan_haha@1.0.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing sheratan_haha@1.0.1. 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: .
Source advisory published: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
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