streak-day-utils
This report shows the evidence for streak-day-utils@1.0.0. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.
OpenSSF/OSV Malicious Advisory
imported 3mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-12047 confirms this npm version as malicious.
Advisory
MAL-2026-12047
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in streak-day-utils (npm)
Details
index.mjs schedules an asynchronous routine at module load that decodes a table of hex-encoded strings to reconstruct references to process, fetch, child_process, /mnt/c, AppData, a Backblaze B2 URL, RenameMe.exe, and a VBScript body invoking WScript.Shell.Run hidden. When Node executes under WSL (detected via /mnt/c), the code enumerates Windows user profiles under /mnt/c/Users, downloads helper.tar.gz from https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/helper.tar.gz, extracts it into the victim's AppData\Local\Microsoft\Windows\syscache directory, and writes vite-native-helper.vbs into the Windows Startup folder to auto-launch the extracted RenameMe.exe on every login. The behavior is presented under a 'vite-cache-sync' cover story, and all filesystem paths, the remote URL, and the VBScript payload are hex-obfuscated to conceal the dropper. Installing or importing this package causes cross-boundary WSL-to-Windows code execution and establishes persistence on the Windows host controlled by the package author.
References
Independent scan evidence
public snapshotBehavioral surface
DynamicRequireFilesystem
Source & flagged code
1 flagged · loading sourceindex.mjsView file
118const [_fs, _path, _cp] = await Promise.all([
L119: import(_d(_c.h)), import(_d(_c.i)), import(_d(_c.j))
L120: ]);
Medium
Dynamic Require
Package source references dynamic require/import behavior.
index.mjsView on unpkg · L118Findings
1 Medium1 Low
MediumDynamic Requireindex.mjs
LowFilesystem
Affected versions and remediation
This report applies to streak-day-utils@1.0.0.
The versions list below shows the verdict for each recorded version.
- Avoid installing streak-day-utils@1.0.0. 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: .
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