MalwareTips
Threat LensFile scan report

Is fireclient-1.21.11.jar safe?

Verdict
Malicious

This file is confirmed SilentNet — abuse.ch researchers uploaded this exact sample to MalwareBazaar as known malware. Delete this Java file from the device, then empty the Recycle Bin or Trash. Scan your system.

This file is confirmed SilentNet — abuse.ch researchers uploaded this exact sample to MalwareBazaar as known malware. Delete this Java file from the device, then empty the Recycle Bin or Trash. Scan your system.

Do not open or run this Java file

Delete this Java file from the device, then empty the Recycle Bin or Trash. Run a full-system antivirus scan.

Read the full analysis
Saved file evidenceAntivirus consensus
0of 74 flagged
Flagged 0No detection 74
Digital specimenfireclient-1.21.11.jarb44026bb24620f39b4…ef20c5d573eeb9
Size1.3 MB
Code signingNot applicable
SandboxRuntime complete
First seen9d ago
Evidence3 priority signals
The hash is catalogued as SilentNet in a researcher malware database.

Recommended next actions

01

Before opening or running

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

02

If you already opened or 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.

Malware intelligence match

Why this file is confirmed malware

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

99%Confidence
Very high
Analyst conclusion

This file is confirmed SilentNet — abuse.ch researchers uploaded this exact sample to MalwareBazaar as known malware. Delete this Java file from the device, then empty the Recycle Bin or Trash. Scan your system.

Where this verdict could be wrong1 caveat
  • If this hash is a polymorphic-collision with a legitimate build, the MB label would be misleading — but MB curation makes this extremely rare.

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

Delete this Java file from the device, then empty the Recycle Bin or Trash. Run a full-system antivirus scan.

Scan transparency

Coverage & freshness

5 of 5 complete

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

  • Antivirus

    Complete

    0 of 74 engines flagged the file.

  • Sandbox

    Complete

    1 isolated runtime environment contributed observations.

  • Network

    Complete

    2 contacted hosts were cross-checked.

  • YARA

    Complete

    6 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
  • 15MITRE ATT&CK techniques
  • 11spawned processes
  • 2network contacts
  • 11filesystem & 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: Created or modified a system service, which can keep code running.

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

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

  • Moderate concern: Transferred a file over the network; malware can use this to fetch additional payloads.

  • Moderate concern: Checks which security software you have installed.

  • Note: Collects details about your system.

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

7 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 open or run this Java file. Delete this Java file from the device, then empty the Recycle Bin or Trash.

  2. Recovery step 02

    If you already opened or 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 publisher's official site and verify its exact hash when possible.

Safety FAQ

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

9 evidence-based answers
Is fireclient-1.21.11.jar a virus?
Evidence-based answer
Yes — fireclient-1.21.11.jar is malicious. Do not open or run it. Delete this Java file from the device, then empty the Recycle Bin or Trash. 0 of 74 antivirus engines flag it (family: SilentNet). It behaves as a trojan — malware disguised as something harmless to trick you into running it. It's also a confirmed malware sample catalogued by the abuse.ch threat-intelligence community. If you've already opened or run it, see the removal and recovery steps below.
What is fireclient-1.21.11.jar?
Evidence-based answer
fireclient-1.21.11.jar is a Java application or archive, about 1.3 MB. Our analysis identifies it as malicious (family: SilentNet) — 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 fireclient-1.21.11.jar?
Evidence-based answer
None — 0 of 74 antivirus engines flagged fireclient-1.21.11.jar, but that does not make it safe: antivirus engines often miss new or targeted samples. The malicious verdict is supported by an exact-hash match in a researcher malware catalogue and the wider saved evidence.
What should I do if I already opened or ran fireclient-1.21.11.jar?
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 fireclient-1.21.11.jar?
Evidence-based answer
To remove fireclient-1.21.11.jar: 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 Java 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 fireclient-1.21.11.jar?
Evidence-based answer
fireclient-1.21.11.jar is classified as a trojan — malware disguised as something harmless to trick you into running it. Engines attribute it to the SilentNet family. Knowing the family matters because it tells you the likely impact — data theft, remote control, file encryption, or unwanted ads — and guides the cleanup.
Has fireclient-1.21.11.jar been seen before?
Evidence-based answer
Yes — this exact file is a known, catalogued malware sample in the abuse.ch MalwareBazaar threat-intelligence feed (tracked as SilentNet), first seen on September 25, 2026. A confirmed listing there is strong, independent evidence that the file is malicious.
What is the SHA-256 hash of fireclient-1.21.11.jar?
Evidence-based answer
The SHA-256 hash of fireclient-1.21.11.jar is b44026bb24620f39b416be635ef9b92ae7fbaacb34c4504b6aef20c5d573eeb9, and its MD5 is 1c97dcd6c4be49cfcb3c6e1d16316a76. 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 fireclient-1.21.11.jar?
Evidence-based answer
This report reflects the scan run on September 27, 2026. Because a file's hash never changes, the identity of fireclient-1.21.11.jar 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.

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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.