MalwareTips
Threat LensFile scan report

Is zstream-app.exe safe?

Verdict
Malicious

A completed sandbox flagged harmful execution involving process injection, LSASS targeting, destructive-impact capability, and defense impairment, reinforced by seven antivirus detections.

One completed sandbox produced a malware finding and recorded offensive techniques including process injection, impact activity, and security-control impairment. Seven of 75 engines detected the unsigned executable, including Microsoft, although the lack of tier-1 family consensus prevents reliable attribution to a specific malware family.

Do not run this file

Quarantine the file and avoid execution. If it has run, isolate the endpoint, keep all protection enabled, scan fully, and investigate LSASS access, injected processes, and possible credential exposure.

Read the full analysis
Saved file evidenceAntivirus consensus
7of 75 flagged
Flagged 7No detection 68
Digital specimenzstream-app.exec71092e7a1b417e888…8f80a5d9faa349
Size24.0 MB
Code signingUnsigned
SandboxRuntime complete
First seen8d ago
Evidence3 priority signals
1 isolated runtime environment classified the observed behavior as malicious.

Recommended next actions

01

Before running

Do not run it. Delete this file from the device, then empty the Recycle Bin or Trash.

02

If you already ran it

Disconnect from the internet, start a full or offline antivirus scan, then secure important accounts from a clean device.

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.

84%Confidence
High
Analyst conclusion

One completed sandbox produced a malware finding and recorded offensive techniques including process injection, impact activity, and security-control impairment. Seven of 75 engines detected the unsigned executable, including Microsoft, although the lack of tier-1 family consensus prevents reliable attribution to a specific malware family.

Where this verdict could be wrong5 caveats
  • Only 1/17 tier-1 engines detected the file, while Avast, BitDefender, ESET-NOD32, Fortinet, and other tier-1 engines did not.
  • engines.tier1FamilyConsensus.family=null, and the seven labels are generic or machine-learning detections rather than a consistent named family.
  • externalIntel.yaraify.ruleCount=0, externalIntel.malwareBazaar.hit=false, and externalIntel.circl.hit=false; these absences may reflect coverage gaps.
  • peAnalysis.highEntropyCode=false and peAnalysis.likelyPacked=false, providing no static packing indicator.
  • droppedChildren.hasMaliciousChild=false, although all 10 child verdicts remain unknown.

These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.

Recommended action

Quarantine the file and avoid execution. If it has run, isolate the endpoint, keep all protection enabled, scan fully, and investigate LSASS access, injected processes, and possible credential exposure.

Scan transparency

Coverage & freshness

4 of 5 complete

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

  • Antivirus

    Complete

    7 of 75 engines flagged the file.

  • Sandbox

    Complete

    1 isolated runtime environment contributed observations.

  • Network

    Partial

    1 runtime contact was observed without a completed reputation cross-check.

  • YARA

    Complete

    3 signature or behavior rules matched.

  • External intel

    Complete

    3 of 3 independent reference sources completed.

Chapter 03

Behavior

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

Runtime flight recorder

Capture complete
  • 1isolated sandbox run
  • 18MITRE ATT&CK techniques
  • 15spawned processes
  • 1network contacts
  • 36filesystem & mutex artifacts

What this file does

Observed actions and their security significance

  • High concern: Injected code into another process, a technique that can conceal execution.

  • High concern: Attempted to impair or bypass security controls.

  • High concern: Manipulated how the operating system loads code, which can redirect execution.

  • Moderate concern: Contained obfuscated or packed code that makes inspection harder.

  • Moderate concern: Runs hidden system commands (script or shell).

  • Moderate concern: Communicated over a common application protocol; malware can use this for command-and-control.

  • Moderate concern: Scans through your files and folders.

These are observed capabilities from an isolated analysis. A technique does not prove malicious intent on its own, and the file never ran on your device.

Threat context

How trojans work

A trojan disguises itself as something useful or harmless to trick you into running it. Once open, it does its real job in the background — anything from stealing data to opening a back door or downloading more malware.

Bottom line:The disguise is the whole trick, so a trustworthy-looking name or icon means nothing.

Recorded behavior

Attack story

Runtime observations grouped by analysis stage. Arrows organize the stages; they do not claim chronology or causality.

ObservedDerived

6 recorded facts from one runtime window. Every fact remains independently traceable in Analyst mode.

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 is dangerous. Treat it as harmful and remove it.

  1. Recovery step 01

    Don't run this file. Delete this file from the device, then empty the Recycle Bin or Trash.

  2. Recovery step 02

    If you already ran it, disconnect from the internet and start with a full antivirus scan or Microsoft Defender Offline scan. If compromise is suspected or the problem persists, use a reputable second-opinion scanner and follow incident-recovery or clean-reinstall guidance.

  3. Recovery step 03

    If you typed any passwords while it was open, change them from a device you trust.

  4. Recovery step 04

    Get a fresh copy from the developer's official site or an official app store.

Safety FAQ

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

8 evidence-based answers
Is zstream-app.exe malware?
Evidence-based answer
Yes — zstream-app.exe is malicious. Do not run it. Delete this file from the device, then empty the Recycle Bin or Trash. 7 of 75 antivirus engines flag it. It behaves as a trojan — malware disguised as something harmless to trick you into running it. If you've already run it, see the removal and recovery steps below.
What is zstream-app.exe?
Evidence-based answer
zstream-app.exe is a Windows executable program, about 24 MB. Our analysis identifies it as malicious — a trojan — malware disguised as something harmless to trick you into running it. Because a file's name and icon can be faked, the safest way to identify it is by its cryptographic hash (below), not its filename.
How many antivirus engines detected zstream-app.exe?
Evidence-based answer
7 of 75 antivirus engines flagged zstream-app.exe, 7 of them as outright malicious. The raw count alone does not establish safety or danger; we also weigh which engines flagged it and corroborating behavior, identity, reputation, and rule evidence. The malicious verdict is supported by 1 isolated runtime environment that classified the observed behavior as malicious and by the wider saved evidence.
I already downloaded and ran zstream-app.exe — what should I do?
Evidence-based answer
Act quickly. 1) Disconnect the device from the internet to stop the malware communicating or spreading. 2) Run a full scan with reputable anti-malware software (such as Malwarebytes) and quarantine everything it finds. 3) Change your important passwords from a DIFFERENT, clean device — many threats log keystrokes or steal saved credentials. 4) If you bank or shop on this device, watch closely for fraud and alert your bank. 5) For a confirmed infection, the most reliable fix is to back up your personal files and reinstall the operating system for a clean start.
How do I remove zstream-app.exe?
Evidence-based answer
To remove zstream-app.exe: 1) restart into Safe Mode (Safe Mode with Networking if you need to download a tool) so the malware doesn't auto-start. 2) Run a full scan with reputable anti-malware software and let it quarantine or delete the detections. 3) Delete this file from the device, then empty the Recycle Bin or Trash. 4) Check your browser extensions, startup items, and scheduled tasks for anything unfamiliar. 5) Reboot and scan again to confirm it's gone. If detections keep coming back, a clean operating-system reinstall is the most dependable cure.
What kind of malware is zstream-app.exe?
Evidence-based answer
zstream-app.exe is classified as a trojan — malware disguised as something harmless to trick you into running it. Knowing the family matters because it tells you the likely impact — data theft, remote control, file encryption, or unwanted ads — and guides the cleanup.
What is the SHA-256 hash of zstream-app.exe?
Evidence-based answer
The SHA-256 hash of zstream-app.exe is c71092e7a1b417e888776818b7b61d0502ae5cdf41873525538f80a5d9faa349, and its MD5 is bb7874e51af5efa09e6ec99a3655bfd6. 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.
How up to date is this analysis of zstream-app.exe?
Evidence-based answer
This report reflects the scan run on September 30, 2026. Because a file's hash never changes, the identity of zstream-app.exe 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.

Scan another
Check a different file
URL instead?
Check if a link is safe
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.