MalwareTips

File scan report

Scan another file

Verdict Malicious

Analyzed , 2 hours ago

Is GoobaaClient.1.21.11.jar safe? No, we rate this exact file malicious.

This exact file is listed in abuse.ch MalwareBazaar, a public malware-sample sharing database, as SilentNet. 25 of the 66 antivirus engines that checked it also flag it.

Read the whole reasonShow less

Strong evidence · Two or more major antivirus engines agree.

Don't open or run this Java file

Run a full-system antivirus scan.

What to do now4 steps

This file is harmful. Don't run it, and remove it.

If you haven't opened or run it

  1. Don't open or run this Java file. Delete it, then empty the Recycle Bin or Trash.

If you already opened or ran it

  1. Disconnect the device from the internet, then run a full scan with your security software.

  2. If you typed passwords on the device after running it, change them from another device you trust.

  3. If the scan keeps finding it, or the device still acts strangely, scan again with a second-opinion scanner from another company; if that doesn't fix it, back up your personal files and reinstall the operating system.

If you already ran it, do these in order.

If you opened or installed it

Avoid banking and sign-ins on that device until it is clean. These free MalwareTips guides walk you through it.

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

Why we think so

Share this file report

GoobaaClient.1.21.11.jar: Malicious — MalwareTips file scan

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

Antivirus results

25 of 66 flagged

  • Flagged 25
  • No detection 41
  • No result 8
FileGoobaaClient.1.21.11.jar83.5 kBSHA-256 edbe22409f8a…d10bb7
  • Code signing Not applicable
  • Test run Completed
  • First seen 3mo ago
18 strong detection rules matched this file.

Chapter 02

Why we think so

2 points against it and 0 in its favour, checked against the scan evidence.

Malware intelligence match

Why this file is treated as malware

The conclusion below is grounded in the recorded hash match and scan evidence.

Analyst conclusion

MalwareBazaar files it under the SilentNet family, first listed on Sep 25, 2026.

Where this verdict could be wrong1 caveat
  • MalwareBazaar accepts submissions from anyone, including automated uploads; legitimate tools bundled with malware are sometimes listed.

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 4 isolated tests; no test environment rated what it did as risky.

Test run summary

Capture complete
  • 4isolated sandbox runs
  • 13sandbox rule tags
  • 4spawned processes
  • 0network contacts
  • 11filesystem & mutex artifacts

What the test run showed

What the file did on a test computer

Confirmed in the test run

  • 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 weakening security settings; no setting change was recorded.

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.

Threat context

How trojans work

A trojan pretends to be something useful or harmless so that you run it. Once open, it does its real job in the background, 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

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

      GoobaaClient.1.21.11.jar

      edbe22409f8a804ff9fdc342e5da643c9e083704d37302d937919ccb60d10bb7

      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\sample.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" -javaagent:"C:\Users\user\AppData\Local\Temp\jartracer.jar" -jar "C:\Users\user\Desktop\download.jar"" >> C:\cmdlinestart.log 2>&1

      Test run
    3. +1 more recorded observation

  3. Files

    Created or changed

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

      3484

      C:\Users\<USER>\AppData\Local\Temp\hsperfdata_<USER>\3484

      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

25 of the 66 antivirus engines that checked it flag 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 · 74 enginesCompleteRisk signal: 25 of 66 engines flagged it · 8 gave no result Details for antivirus engines
Sandbox runVirusTotal sandboxes · C2AE, CAPE Sandbox, ZenboxComplete4 runs: 1 clean, 3 without a verdict Details for sandbox run
Contacted hostsMalwareTips URL scannerNot neededThe sandbox recorded no contacted hosts to checkNo date recorded
Signature rulesYARAify community rules + MalwareTips rulesCompleteRisk signal: 18 community YARA rules (18 malware-specific) · 1 MalwareTips behaviour rule Details for signature rules
Malware sample databaseabuse.ch MalwareBazaarCompleteRisk signal: Listed (family: SilentNet)
Known-software referenceCIRCL hashlookupCompleteNo match

Engines that flagged it 25

  • Avast (major engine)Java:MalwareX-gen [Misc]
  • AVG (major engine)Java:MalwareX-gen [Misc]
  • Avira (major engine)TR/JAVA.Agent
  • BitDefender (major engine)Trojan.GenericKD.81470095
  • Emsisoft (major engine)Trojan.GenericKD.81470095 (B)
  • ESET-NOD32 (major engine)Java/Agent.ADG trojan
  • F-Secure (major engine)Trojan.TR/JAVA.Agent
  • Fortinet (major engine)Java/Agent.ADG!tr
17 more in the full engine list

File fingerprint

Last analyzed
Oct 27, 2026, 8:31 AM UTC
SHA-256
edbe22409f8a804ff9fdc342e5da643c9e083704d37302d937919ccb60d10bb7
SHA-1
9720552d9013096bccc6b58cfb1e3882bfc6b2f6
MD5
d5b18d1ca18be6c0167fe209a3a1c36a

About this file

GoobaaClient.1.21.11.jar is a JAR file of 83.5 kB.

Type and size
JAR · 83.5 kB
Signer
Not applicable
First seen
Jul 26, 2026On VirusTotal.
Submitted by
354 distinct sources

First scanned

Chapter 05

Questions & answers

Short answers to the 9 questions people ask most about this file.

Is GoobaaClient.1.21.11.jar malware?
Yes. This copy of GoobaaClient.1.21.11.jar (SHA-256 edbe2240…0bb7) is malicious. Other files with the same name can be different, so check the hash. Don't open or run it. Delete it, then empty the Recycle Bin or Trash. 25 of the 66 antivirus engines that checked it flag it, some as SilentNet. Antivirus engines classify it as a trojan: malware disguised as something harmless so that you run it. This exact file is also listed in MalwareBazaar, a public malware database. If you've already opened or run it, see the steps below.
What is GoobaaClient.1.21.11.jar?
GoobaaClient.1.21.11.jar is a Java program (JAR), about 83.5 kB. VirusTotal first saw it on Jul 26, 2026.
How many antivirus engines detected GoobaaClient.1.21.11.jar?
25 of the 66 antivirus engines that checked it flag GoobaaClient.1.21.11.jar, including Kaspersky and ESET. We weigh which engines flagged it and what else the scan found, not just the count. The rating also rests on a listing of this exact file in MalwareBazaar, a public malware database, and on the other evidence.
I already downloaded and opened or ran GoobaaClient.1.21.11.jar — what should I do?
Act quickly. 1) Disconnect the device from the internet. 2) Run a full scan with your antivirus and let it remove what it finds. 3) Change your important passwords from another device you trust, starting with email and banking, and turn on two-step verification. 4) If you bank or shop on this device, watch your accounts and tell your bank about payments you don't recognise. 5) If the scan keeps finding it, back up your personal files and reinstall the operating system.
How do I remove GoobaaClient.1.21.11.jar?
To remove GoobaaClient.1.21.11.jar: 1) Delete it, then empty the Recycle Bin or Trash. 2) Run a full scan with your security software. 3) Check the programs that start automatically for anything you don't recognise.
What kind of malware is GoobaaClient.1.21.11.jar?
Antivirus engines classify GoobaaClient.1.21.11.jar as a trojan: malware disguised as something harmless so that you run it. Engines attribute it to the SilentNet family.
Has GoobaaClient.1.21.11.jar been seen before?
Yes. This exact file is listed in MalwareBazaar, a public malware database (tracked as SilentNet), first listed on Sep 25, 2026. MalwareBazaar accepts uploads from anyone, including automated ones, so the listing supports the other evidence rather than proving malice on its own.
What is the SHA-256 hash of GoobaaClient.1.21.11.jar?
The SHA-256 fingerprint of GoobaaClient.1.21.11.jar is edbe22409f8a804ff9fdc342e5da643c9e083704d37302d937919ccb60d10bb7, and its MD5 is d5b18d1ca18be6c0167fe209a3a1c36a. 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 GoobaaClient.1.21.11.jar?
This report reflects the scan on Oct 27, 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.

Related file reports

Other files people checked with the same threat family, and recent reports with the same rating. A matching threat family does not make two files the same: only the SHA-256 fingerprint identifies a file.

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