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Verdict Suspicious

Analyzed , 4 days ago

Is KryptonClientPlus.jar safe? Treat it as suspicious.

This Java game-client archive is flagged by 4 of the 65 antivirus engines that checked it, including ESET and Fortinet, with a stealer label, and one sandbox run returned…

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Why Suspicious? 4 antivirus engines flag it and one sandbox test run rated it malicious while another found nothing.

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

Don't open or run it until you know where it came from

Avoid running this file. If you already ran it, scan your system and change passwords for your game, Discord and browser accounts from a clean device.

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 open or run 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 opened or ran 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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KryptonClientPlus.jar: 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

4 of 65 flagged

  • Flagged 4
  • No detection 61
  • No result 10
FileKryptonClientPlus.jar5.7 MBSHA-256 c1759d863629…c4a805
  • Code signing Not applicable
  • Test run Completed
  • First seen 12d ago
A sandbox test run rated its behaviour as malicious.

Chapter 02

Why we think so

5 points against it and 3 in its favour, checked against the scan evidence.

MT AI Engine · Verdict analysis

The reasoning behind this verdict

Analyst conclusion

Two major antivirus engines, ESET and Fortinet, detect the same Java trojan signature, and a third engine labels it a Java stealer. Our sandbox runs disagreed: one returned malicious and another returned clean, and no injection target or malicious network contact was recorded. Most major engines stayed silent.

Where this verdict could be wrong2 caveats
  • 16 major antivirus engines, including Kaspersky, BitDefender and Microsoft, did not flag the file.
  • One sandbox run returned clean, and no injection target, persistence or malicious network contact was recorded.

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 5 isolated tests; 1 test environment rated what it did as risky.

Test run summary

Capture complete
  • 5isolated sandbox runs
  • 16sandbox rule tags
  • 4spawned processes
  • 0network contacts
  • 16filesystem & 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.

  • Moderate concern: Hid files or windows on the test computer.

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

  • Note: Loaded extra code modules while running.

  • Note: Checked which security software was installed on the test computer.

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 downloading a file, but no download was recorded.

  • Not confirmed: A sandbox rule tagged this run as creating a service; no new service 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 5: FileSeen in the test run

      KryptonClientPlus.jar

      c1759d863629d268fea8f72c859fbf13a4fdafb2438fd0ecf90ab99cd5c4a805

      Uploaded file

  2. Processes

    What ran

    2
    1. Evidence 2 of 5: ProcessSeen in the test run

      javaw.exe

      "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\<USER>\Desktop\download.jar"

      Test run
    2. Evidence 3 of 5: ProcessSeen in the test run

      cmd.exe

      C:\Windows\SysWOW64\cmd.exe C:\Windows\system32\cmd.exe /c ""C:\Program Files\Java\jre1.8.0_441\bin\java.exe" -jar "C:\Users\user\Desktop\sample.jar""

      Test run
    3. +1 more recorded observation

  3. Files

    Created or changed

    2
    1. Evidence 4 of 5: Written fileSeen in the test run

      3360

      C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\3360

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

      3903daac9bc4a3b7.timestamp

      C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp

      Test run
    3. +1 more recorded observation

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

Chapter 04

Technical details

4 of the 65 antivirus engines that checked it flag it.

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 · 75 enginesCompleteRisk signal: 4 of 65 engines flagged it · 10 gave no result Details for antivirus engines
Sandbox runVirusTotal sandboxes · C2AE, CAPE Sandbox, Rising MOVESCompleteWorth noting: 5 runs: 1 malicious, 1 clean, 3 without a verdict Details for sandbox run
Contacted hostsMalwareTips URL scannerComplete3 contacted hosts checked
Signature rulesYARAify community rules + MalwareTips rulesComplete1 MalwareTips behaviour rule Details for signature rules
Malware sample databaseabuse.ch MalwareBazaarCompleteNot listed
Known-software referenceCIRCL hashlookupCompleteNo match

Engines that flagged it 4

  • ESET-NOD32 (major engine)Java/Agent.AET trojan
  • Fortinet (major engine)Java/Agent.AET!tr
  • alibabacloudTrojan:Java/Agent.AAB
  • huorongTrojanSpy/JAVA.Stealer.p

File fingerprint

Last analyzed
Oct 22, 2026, 8:14 AM UTC
SHA-256
c1759d863629d268fea8f72c859fbf13a4fdafb2438fd0ecf90ab99cd5c4a805
SHA-1
18163b7f58328588f623f7890279ffb7a3eb76df
MD5
ae8182dece27cf7a699971bb728475be

About this file

KryptonClientPlus.jar is a JAR file of 5.7 MB.

Type and size
JAR · 5.7 MB
Signer
Not applicable
First seen
Oct 13, 2026On VirusTotal.
Submitted by
24 distinct sources

First scanned

Chapter 05

Questions & answers

Short answers to the 6 questions people ask most about this file.

Is KryptonClientPlus.jar safe, or is it malware?
KryptonClientPlus.jar is rated Suspicious: some signs point to a problem, but nothing confirms it is harmful. 4 of the 65 antivirus engines that checked it flag it. Don't open or run it unless you're sure where it came from. If you need it, download it again from the project's own website.
What is KryptonClientPlus.jar?
KryptonClientPlus.jar is a Java program (JAR), about 5.7 MB. VirusTotal first saw it on Oct 13, 2026.
How many antivirus engines detected KryptonClientPlus.jar?
4 of the 65 antivirus engines that checked it flag KryptonClientPlus.jar, including ESET and Fortinet. We weigh which engines flagged it and what else the scan found, not just the count.
I already downloaded and opened or ran KryptonClientPlus.jar — what should I do?
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.
What is the SHA-256 hash of KryptonClientPlus.jar?
The SHA-256 fingerprint of KryptonClientPlus.jar is c1759d863629d268fea8f72c859fbf13a4fdafb2438fd0ecf90ab99cd5c4a805, and its MD5 is ae8182dece27cf7a699971bb728475be. 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 KryptonClientPlus.jar?
This report reflects the scan on Oct 22, 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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Recent reports on other files with the same rating.

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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.