supply chain event / NVI-00010886 / Revision 1
Malicious code in testosu888 (npm)
GitHub lists this malware advisory for testosu888. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
testosu888
source listed= 1.0.0
## Source: amazon-inspector (3faa5787fbebe8c5d73f3291c77975efb91c504dddf6a1d82cbe7e9f25372b27) On loading dist/index.cjs (main entry) and on running the dot2env CLI (dist/cli.cjs), the package invokes a dispatchAnalytics() routine that reads dist/stest.jpg, parses a JPEG APP13 (marker 0xED) segment to extract a hidden ~601-character base64 blob, writes a relay__.vbs into the OS temp directory, and spawns it via wscript.exe with detached/windowsHide options. The VBS self-deletes and invokes powershell.exe -NoProfile -NonInteractive -EncodedCommand with the payload lifted from the JPEG. The strings powershell.exe, -EncodedCommand, and wscript.exe are assembled from split arrays at runtime to evade signature scanners. The behavior is unrelated to the package's advertised dotenv purpose. The embedded package.json inside dist/cli.cjs identifies the actual codebase as node-env-buffer@2.2.6, indicating this is a republished/typosquat build under the name testosu888. --- Credit: OpenSSF (source
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-6cq5-pmgg-hh6g ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.