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Verdict Suspicious

Analyzed , 8 days ago

Is KryptonPlus-sweatierfrosts_06831.jar safe? Treat it as suspicious.

A single-submitter Java archive styled as a game client mod, flagged by one major antivirus engine as a Java downloader, with weak runtime corroboration.

Read the whole reasonShow less

Why Suspicious? One antivirus engine (Fortinet) flags it; nothing else confirms it.

Limited evidence

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

Avoid running this file unless it came directly from the project's official source. Keep your antivirus enabled and scan your system if it was already opened.

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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KryptonPlus-sweatierfrosts_06831.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

1 of 64 flagged

  • Flagged 1
  • No detection 63
  • No result 11
FileKryptonPlus-sweatierfrosts_06831.jar2.4 MBSHA-256 3a9bab8409f6…57014a
  • Code signing Not applicable
  • Test run Completed
  • First seen 8d ago
1 of the 64 antivirus engines that checked it flags it (Fortinet).

Chapter 02

Why we think so

3 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

Fortinet labels this JAR as a Java downloader, while none of the other 74 engines flagged it and one sandbox run ended clean. It was first seen on Oct 18, 2026 from a single submitter. Its name resembles game mod or client lures often used to spread Java malware, so caution is warranted.

Where this verdict could be wrong1 caveat
  • Sixteen major antivirus engines reported nothing and the single sandbox run ended clean, so the Fortinet label could be a rule-based false positive.

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 · 5 complete · 1 not needed or not applicable. 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
  • 16sandbox rule tags
  • 2spawned processes
  • 0network contacts
  • 9filesystem & 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

      KryptonPlus-sweatierfrosts_06831.jar

      3a9bab8409f6d0b6f6fed49751ac823ba3d5c29e84f89084a03aee432f57014a

      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\runtime.jar"

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

      java

      /usr/bin/java -jar /tmp/download.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

      6152

      C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\6152

      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

1 of the 64 antivirus engines that checked it flags it.

Sources checked

Every check behind this verdict

6 sources checked · 5 complete · 1 not needed or not applicable. Complete means the check returned a usable result; it does not mean the file is safe.

SourceStatusResultChecked
Antivirus enginesVirusTotal · 75 enginesCompleteRisk signal: 1 of 64 engines flagged it · 11 gave no result Details for antivirus engines
Sandbox runVirusTotal sandboxesCompleteCombined summary: clean verdict Details for sandbox run
Contacted hostsMalwareTips URL scannerNot neededThe sandbox recorded no contacted hosts to checkNo date recorded
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 1

  • Fortinet (major engine)Java/Agent.IT!tr.dldr

File fingerprint

Last analyzed
Oct 18, 2026, 1:42 AM UTC
SHA-256
3a9bab8409f6d0b6f6fed49751ac823ba3d5c29e84f89084a03aee432f57014a
SHA-1
1c2c549e160724ba33ba71502d1e90d53d986107
MD5
cd632d8d5ecaceb967ad95aa08cb1034

About this file

KryptonPlus-sweatierfrosts_06831.jar is a JAR file of 2.4 MB.

Type and size
JAR · 2.4 MB
Signer
Not applicable
First seen
Oct 18, 2026On VirusTotal.
Submitted by
1 sourceRarely seen: few people have submitted this exact file.

First scanned

Chapter 05

Questions & answers

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

Is KryptonPlus-sweatierfrosts_06831.jar safe, or is it malware?
KryptonPlus-sweatierfrosts_06831.jar is rated Suspicious: some signs point to a problem, but nothing confirms it is harmful. 1 of the 64 antivirus engines that checked it flags 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 KryptonPlus-sweatierfrosts_06831.jar?
KryptonPlus-sweatierfrosts_06831.jar is a Java program (JAR), about 2.4 MB. VirusTotal first saw it on Oct 18, 2026.
How many antivirus engines detected KryptonPlus-sweatierfrosts_06831.jar?
1 of the 64 antivirus engines that checked it flags KryptonPlus-sweatierfrosts_06831.jar (Fortinet). We weigh which engines flagged it and what else the scan found, not just the count.
What should I do if I already opened or ran KryptonPlus-sweatierfrosts_06831.jar?
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 KryptonPlus-sweatierfrosts_06831.jar?
The SHA-256 fingerprint of KryptonPlus-sweatierfrosts_06831.jar is 3a9bab8409f6d0b6f6fed49751ac823ba3d5c29e84f89084a03aee432f57014a, and its MD5 is cd632d8d5ecaceb967ad95aa08cb1034. 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 KryptonPlus-sweatierfrosts_06831.jar?
This report reflects the scan on Oct 18, 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.