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Verdict Suspicious

Analyzed , 10 days ago

Is The_Labyrinth_of_Grisaia_Unrated_Installer.exe safe? Treat it as suspicious.

A verified, older installer has scant antivirus detection, but two malware-specific YARA matches and mapped injection-related techniques warrant caution before execution.

Read the whole reasonShow less

Why Suspicious? 2 antivirus engines flag it, but no major engine agrees and a community rule for known malware matched it.

Moderate evidence · More than one sign points to a problem, but nothing confirms it is harmful.

Don't install it until you know where it came from

Verify the installer against a fresh copy from the original distributor before running it. If its source or signature differs, delete it and keep security protection enabled.

What to do now4 steps

Some signs point to a problem, but nothing confirms it is harmful. Treat it with caution.

What to do

  1. Don't install it unless you're sure where it came from.

  2. Check where you got it: an unexpected attachment, a link someone sent you or a re-upload is a red flag.

  3. If you can't confirm where it came from, delete it. If you need the program, download it again from the publisher's own website.

If you already installed it

  1. Stop using it, run a full scan with your antivirus and watch for unexpected behavior or security alerts.

Not sure what to do?

Ask the MalwareTips community before you run it. If you already ran it, follow the cleanup guide.

Paste this report's link in your topic so helpers can see what was found.

Why we think so

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The_Labyrinth_of_Grisaia_Unrated_Installer.exe: Suspicious — MalwareTips file scan

The link always shows the latest result for this exact file (its SHA-256 fingerprint).

Reads the latest antivirus results for this file's hash. Nothing is uploaded.

Antivirus results

2 of 73 flagged

  • Flagged 2
  • No detection 71
  • No result 4
FileThe_Labyrinth_of_Grisaia_Unrated_Installer.exe343.0 kBSHA-256 90c08985e1c1…383346
  • Code signing Sekai Project, Inc.
  • Test run Completed
  • First seen 9y ago
1 strong detection rule matched this file.

Chapter 02

Why we think so

4 points against it and 5 in its favour, checked against the scan evidence.

MT AI Engine · Verdict analysis

The reasoning behind this verdict

Analyst conclusion

Only 2 of the 73 antivirus engines that checked it flagged this signed installer, and none were major antivirus engines. However, two malware-specific YARA patterns matched, and the test run mapped and T1134, so the file should not be run until its download source and signature are independently verified.

Where this verdict could be wrong4 caveats
  • Only two antivirus products raised generic or grayware-style detections, while all 18 reporting major antivirus engines did not flag the file.
  • The digital signature verifies as Sekai Project, and the sample has been known since 2017 rather than appearing recently.
  • The completed sandbox run returned clean, and no injected process target was recorded despite the mapping.
  • All eight observed contacts were covered by the host-reputation check, with no malicious or suspicious host matches.

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

6 sources checked · all complete. See every source

Chapter 03

What it did in our test

It ran in our isolated test environment; no test environment rated what it did as risky.

Test run summary

Capture complete
  • 17sandbox rule tags
  • 8spawned processes
  • 2network contacts
  • 27filesystem & mutex artifacts

What the test run showed

What the file did on a test computer

Confirmed in the test run

  • Moderate concern: Contains packed or scrambled code that is harder to inspect (common in installers too).

  • Moderate concern: Ran commands or a script on the test computer.

  • Note: Read the user name of the test computer.

  • Note: Listed the programs running on the test computer.

  • Note: Talked to servers over the internet during the test run.

  • Note: Read basic details of the test computer, such as its Windows version.

  • Note: Looked through folders on the test computer (most installers do this).

Sandbox labels we could not confirm (common in safe files too)

  • Not confirmed: A sandbox rule tagged this run as code injection, but no injected program was recorded.

  • Not confirmed: A sandbox rule tagged this run as changing how Windows loads code; nothing confirms it.

This file was run on a test computer (a sandbox), not on yours. Labels we could not confirm are listed so you can see them, but they are not treated as evidence against the file.

Recorded behavior

What happened in the test

Grouped by step. The order is not a timeline.

Seen in the test runWorked out from other results

  1. Input file

    The submitted object

    1
    1. Evidence 1 of 7: FileSeen in the test run

      The_Labyrinth_of_Grisaia_Unrated_Installer.exe

      90c08985e1c19b3cb2bda1032c1d1a0c01655249c505fd1b0382f78066383346

      Uploaded file

  2. Processes

    What ran

    2
    1. Evidence 2 of 7: ProcessSeen in the test run

      software.exe

      "C:\Users\<USER>\Desktop\software.exe"

      Test run
    2. Evidence 3 of 7: ProcessSeen in the test run

      software.tmp

      "C:\Users\<USER>\AppData\Local\Temp\is-5LUB2.tmp\software.tmp" /SL5="$2D00EA,76800,0,C:\Users\<USER>\Desktop\software.exe"

      Test run
    3. +1 more recorded observation

  3. Files

    Created or changed

    2
    1. Evidence 4 of 7: Written fileSeen in the test run

      software.tmp

      C:\Users\<USER>\AppData\Local\Temp\is-5LUB2.tmp\software.tmp

      Test run
    2. Evidence 5 of 7: Written fileSeen in the test run

      _setup64.tmp

      C:\Users\<USER>\AppData\Local\Temp\is-5VVR9.tmp\_isetup\_setup64.tmp

      Test run
    3. +1 more recorded observation

  4. Network

    Hosts contacted

    2
    1. Evidence 6 of 7: Contacted hostSeen in the test run

      142.251.183.94

      Contacted during the test run.

      Test run
    2. Evidence 7 of 7: Contacted hostSeen in the test run

      <MACHINE_DNS_SERVER>

      Contacted during the test run.

      Test run
    3. +1 more recorded observation

7 facts from the test run. See the full activity list.

Chapter 04

Technical details

2 of the 73 antivirus engines that checked it flag it; signed by Sekai Project, Inc..

Sources checked

Every check behind this verdict

6 sources checked · all complete. Complete means the check returned a usable result; it does not mean the file is safe.

SourceStatusResultChecked
Antivirus enginesVirusTotal · 77 enginesCompleteRisk signal: 2 of 73 engines flagged it · 4 gave no result Details for antivirus engines
Sandbox runVirusTotal sandboxesCompleteCombined summary: clean verdict Details for sandbox run
Contacted hostsMalwareTips URL scannerComplete8 contacted hosts checked Details for contacted hosts
Signature rulesYARAify community rules + MalwareTips rulesCompleteWorth noting: 6 community YARA rules (1 malware-specific) · 1 MalwareTips behaviour rule Details for signature rules
Malware sample databaseabuse.ch MalwareBazaarCompleteNot listed
Known-software referenceCIRCL hashlookupCompleteNo match

Engines that flagged it 2

  • CrowdStrikewin/grayware_confidence_60% (D)
  • ZillyaDropper.Generic.Win32.13853

File fingerprint

Last analyzed
Oct 17, 2026, 1:47 PM UTC
SHA-256
90c08985e1c19b3cb2bda1032c1d1a0c01655249c505fd1b0382f78066383346
SHA-1
b6185f8ade1e237861c5d2906ecd0f9dafe9c0f7
MD5
f901208ad80bd29810441d0dd5911ad1

About this file

The_Labyrinth_of_Grisaia_Unrated_Installer.exe is a Win32 EXE file of 343.0 kB.

Type and size
Win32 EXE · 343.0 kB
Signer
Sekai Project, Inc.Valid code signature.
First seen
Jun 1, 2017On VirusTotal.
Submitted by
8 distinct sourcesRarely seen: few people have submitted this exact file.
Packer
None detected
Entropy
6.09 of 8

First scanned Updated

Chapter 05

Questions & answers

Short answers to the 7 questions people ask most about this file.

Is The_Labyrinth_of_Grisaia_Unrated_Installer.exe safe, or is it malware?
The_Labyrinth_of_Grisaia_Unrated_Installer.exe is rated Suspicious: some signs point to a problem, but nothing confirms it is harmful. 2 of the 73 antivirus engines that checked it flag it. Don't install it unless you're sure where it came from. If you need the software, download a fresh installer from the developer's own website.
What is The_Labyrinth_of_Grisaia_Unrated_Installer.exe?
The_Labyrinth_of_Grisaia_Unrated_Installer.exe is a software installer, about 343.0 kB. It carries no version information saying what it is or who made it. VirusTotal first saw it on Jun 1, 2017.
How many antivirus engines detected The_Labyrinth_of_Grisaia_Unrated_Installer.exe?
2 of the 73 antivirus engines that checked it flag The_Labyrinth_of_Grisaia_Unrated_Installer.exe, including CrowdStrike and Zillya. We weigh which engines flagged it and what else the scan found, not just the count.
What should I do if I already installed The_Labyrinth_of_Grisaia_Unrated_Installer.exe?
No infection is confirmed: the rating is a caution, not a malware finding. 1) Check where it came from. If you can't confirm the source, delete it. 2) Run a full scan with your security software. 3) If the scan finds something, follow its removal steps and change passwords you typed on the device since then.
Is The_Labyrinth_of_Grisaia_Unrated_Installer.exe digitally signed?
Yes. The_Labyrinth_of_Grisaia_Unrated_Installer.exe has a valid digital signature from Sekai Project, Inc., which shows the file hasn't been changed since that publisher signed it. Malware is sometimes signed with stolen certificates, so a signature alone isn't proof of safety.
What is the SHA-256 hash of The_Labyrinth_of_Grisaia_Unrated_Installer.exe?
The SHA-256 fingerprint of The_Labyrinth_of_Grisaia_Unrated_Installer.exe is 90c08985e1c19b3cb2bda1032c1d1a0c01655249c505fd1b0382f78066383346, and its MD5 is f901208ad80bd29810441d0dd5911ad1. Two files with the same SHA-256 are identical, so use it to check you have exactly this file, not just one with the same name.
How up to date is this analysis of The_Labyrinth_of_Grisaia_Unrated_Installer.exe?
This report reflects the scan on Oct 17, 2026. A file's fingerprint never changes, but antivirus engines keep learning, so a rating can change later. To get a newer result, scan the file again: we refresh the antivirus results when the saved ones are out of date.
Chapter 06

Community

Member reviews and reports for this exact file hash.

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This report and its SHA-256 fingerprint are public, so the next person who checks the same file gets an instant answer; documents and images are listed by type instead of their file name. A file we had not seen before is uploaded to VirusTotal, whose security partners and subscribers can download it; MalwareTips deletes its own copy after the scan. If you ran this file and are worried, scan your device with up-to-date security software.