MalwareTips
Threat LensFile scan report

Is nlinstr.ok safe?

Verdict
Safe

A 3-byte text file listed in the NSRL reference database with zero engine detections across 75 scanners.

Zero of 75 engines flagged the file. It is a known NSRL reference entry with hundreds of prior benign submissions and multiple sandbox reports confirming clean status.

Open with normal care

No action required; the file is a known benign reference artifact.

Read the full analysis
Saved file evidenceAntivirus consensus
0of 75 flagged
Flagged 0No detection 75
Digital specimennlinstr.okdc51b8c96c2d745df3…0632fdbf97fc22
Size3 B
Code signingNot applicable
SandboxPartial coverage
First seen17y ago
Evidence3 priority signals
0 of 75 antivirus engines flagged the file.

Recommended next actions

01

Before opening

Open it only when its sender or download source is one you independently trust.

02

If you already opened it

Keep normal device protection enabled and stop if the file behaves unexpectedly.

Chapter 02

Intelligence

The saved assessment, checked against the scan evidence and recorded coverage.

MT AI Engine · Verdict analysis

The reasoning behind this verdict

This section explains the evidence supporting the verdict and keeps conflicting or missing signals visible.

95%Confidence
Very high
Analyst conclusion

Zero of 75 engines flagged the file. It is a known NSRL reference entry with hundreds of prior benign submissions and multiple sandbox reports confirming clean status.

Recommended action

No action required; the file is a known benign reference artifact.

Scan transparency

Coverage & freshness

2 of 5 complete

Complete means the check returned a usable result. It does not mean the file is safe.

  • Antivirus

    Complete

    0 of 75 engines flagged the file.

  • Sandbox

    Partial

    Runtime data is present, but no completed sandbox environment is recorded.

  • Network

    Not run

    No contacted-host reputation check is recorded.

    No timestamp recorded

  • YARA

    Complete

    Rule evaluation completed with no recorded matches.

  • External intel

    Partial

    1 of 3 independent reference sources completed.

Chapter 03

Behavior

Plain-English impact first, then the observed runtime evidence.

Chapter 04

Detection & Forensics

Consensus, attribution, signatures, code structure, prevalence, and identity.

Chapter 05

Safety & FAQ

Complete recovery guidance and answers for the next decision.

What to do now

This file appears low risk based on the evidence available now.

  1. Recovery step 01

    Open it only when its sender or download source is one you independently trust.

  2. Recovery step 02

    A clean result reduces known risk, but it cannot guarantee that every new or targeted threat has been detected.

  3. Recovery step 03

    Keep your antivirus and Windows updates switched on so you stay protected.

Safety FAQ

Direct answers grounded in the saved verdict and evidence in this report.

6 evidence-based answers
Is nlinstr.ok safe?
Evidence-based answer
nlinstr.ok appears safe. 0 of 75 antivirus engines flagged it. Open it only when its sender or download source is one you independently trust.
What is nlinstr.ok?
Evidence-based answer
nlinstr.ok is a file, about 3 bytes. Our analysis did not identify a verdict-driving threat signal. A file's name can be reused by different files, so we identify it by its cryptographic hash (below).
How many antivirus engines detected nlinstr.ok?
Evidence-based answer
None — 0 of 75 antivirus engines flagged nlinstr.ok. That's reassuring, though it is not proof that a file is safe, so we also weigh its behaviour, identity, and reputation.
What is the SHA-256 hash of nlinstr.ok?
Evidence-based answer
The SHA-256 hash of nlinstr.ok is dc51b8c96c2d745df3bd5590d990230a482fd247123599548e0632fdbf97fc22, and its MD5 is eff5bc1ef8ec9d03e640fc4370f5eacd. This hash is the file's unique fingerprint — two files with the same SHA-256 are identical. Use it to confirm you're looking at exactly this file (not just one with the same name) when comparing against antivirus databases or a download's published checksum.
Is it safe to open nlinstr.ok?
Evidence-based answer
Based on the recorded evidence, nlinstr.ok has a low observed risk. The important caveat is source: make sure you downloaded it from the official website or a trusted store, because attackers sometimes distribute malware-laced copies under a legitimate file's name. If your own antivirus flags it, verify the source and the exact hash before overriding the warning.
How up to date is this analysis of nlinstr.ok?
Evidence-based answer
This report reflects the scan run on August 5, 2026. Because a file's hash never changes, the identity of nlinstr.ok is fixed — but antivirus coverage improves over time, so a file that looks clean today can pick up detections later (and vice-versa). If you need the latest picture, MalwareTips staff can re-run the analysis from scratch.
Chapter 06

Community

Member reviews and reports for this exact file hash.

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The raw file is processed temporarily and is not retained after processing. Its hash and report are public and permanent, so the next person who checks the same file gets an instant answer. Unknown files may be submitted to VirusTotal for analysis. If you ran this file on your computer and are worried, scan your system with an up-to-date antivirus and change critical passwords from a different device.