Is VirginClient-1.21.11.jar Safe? JAR Virus and Malware Scan Report

[!WARNING] Final verdict available at the end of this report.

What This JAR Scanner Found

This JAR contains 156 Java classes, and all 156 were successfully parsed and decompiled. The scanner found suspicious indicators in 11 classes (about 7% of the codebase). Most findings involve normal-looking mod features such as configuration files, saved player information, command instructions, and a GitHub project link.

However, one core class—zgoly.meteorist.modules.autotrade.offers.ItemsOfferHash—needs much closer inspection. It combines network APIs, local file access, directory enumeration, cryptography/Base64 functions, and ProcessBuilder, which can start or control operating-system processes. Its method names are also unusually random-looking, making its purpose difficult to assess from the report alone.

The scan found no decompiler failures, no parsing failures, and no broad anti-analysis pattern. That means the scanner had full coverage of the JAR’s compiled classes, but static scanning still cannot reveal every runtime action or the contents of data retrieved from an unknown remote endpoint.

Questions the Full Report Answers

• Is the file access limited to normal mod configuration and command data?
• Which findings are in ordinary mod code, and which are unusually hard to explain?
• Does the JAR contain remote-control, process-management, or data-upload indicators?
• Are there known outbound domains beyond the project’s GitHub page?
• How much of the JAR was successfully inspected?

Malware and Virus Findings

No direct evidence of credential theft, token grabbing, browser-data theft, hidden persistence, destructive file deletion, or confirmed data exfiltration was detected in the supplied report.

However, the scanner did find a high-signal combination in one core class: local file and directory access, network connection APIs, cryptographic/Base64 routines, and process-related code. In particular, a method accepting a process ID (pid) is flagged for process execution, which is not typical for a simple Minecraft mod configuration or auto-trading feature.

The report does not show a hardcoded destination URL or domain for this behavior, so it cannot establish where any connection would go or what data may be transmitted. The only explicit URL found is the project’s GitHub repository.

RAT Detection

The report does not provide enough evidence to confirm that this JAR is a remote-access trojan (RAT). There is no confirmed remote shell, command-and-control server, persistence mechanism, or explicit remote command handler shown.

That said, the process-management, network, file-system, and encryption indicators concentrated in ItemsOfferHash are more concerning than ordinary Minecraft mod behavior. They warrant manual source review or sandbox testing before running the JAR on a main account or normal computer.

Suspicious Classes and Evidence

Core JAR or Mod Code

Class	Severity	Behavior	Evidence
zgoly.meteorist.Meteorist	Low	Project website link	getWebsite() contains https://github.com/Zgoly/Meteorist.
zgoly.meteorist.commands.InstructionsCommand	Low	Reads or handles instruction files	handleInstruction(File file, int runs) uses file APIs.
zgoly.meteorist.commands.PlayersInfoCommand	Low	Saves player information	savePlayersInfo(...) uses file APIs.
zgoly.meteorist.commands.arguments.InstructionArgumentType	Low	Lists and finds instruction files	Uses file and directory-enumeration APIs.
zgoly.meteorist.devmodules.DocsGenerator	Low	File-related documentation utility	getClassLink(Class<?> clazz) uses NIO file APIs.
zgoly.meteorist.modules.autotrade.offers.ItemsOfferHash	High	File access, directory scanning, network connections, crypto/Base64, and process handling	Uses URL/URLConnection, NIO file APIs, ProcessBuilder, crypto, Base64, and methods with random-looking names.
zgoly.meteorist.modules.minescript.MinescriptServiceFactory	Low	Dynamic integration loading	Uses Java reflection in create(...).
zgoly.meteorist.modules.minescript.RealMinescriptService	Low	Dynamic Minescript integration	Uses Java reflection in getJobMap().
zgoly.meteorist.utils.MeteoristUtils	Low	Text/file-name cleanup utility	removeInvalidChars(String text) is flagged for NIO file API usage.
zgoly.meteorist.utils.config.MeteoristConfig	Low	Saves and loads mod configuration	save(...) and load(...) use file APIs.
zgoly.meteorist.utils.config.MeteoristConfigManager	Low	Manages mod configuration files	Creates folders, lists config files, and saves configs.

The highest-concern methods are inside ItemsOfferHash:

• b40x7vhvg7wkm6() — local file access plus ProcessBuilder.
• mt45n9vo3simi(int pid) — process-execution indicator involving a process ID.
• nzus9l8xeafd(String url) and nosxceq80pabmb(String url) — URL/network APIs combined with local file operations.
• cb3rq1xwgu48(Path dir) — directory enumeration.
• wpu5pn3rtnyox() and do4c5zl9gcry5(byte[] data) — Base64/cryptographic operations.

The report does not explain the actual logic inside these methods, their remote destinations, or whether they are ever called during normal gameplay.

Bundled Third-Party Libraries

No suspicious bundled third-party libraries were identified in this report. The flagged classes are under the JAR’s own zgoly.meteorist package rather than common shaded-library packages such as org.bstats, org.hsqldb, or org.slf4j.

Network Activity

The report found one explicit external URL:

• https://github.com/Zgoly/Meteorist — found in both fabric.mod.json and zgoly.meteorist.Meteorist.getWebsite().

This is consistent with a project homepage or source repository link.

Separately, ItemsOfferHash uses Java’s URL and URLConnection APIs. The scan did not identify a hardcoded domain, URL, or IP address for those connections. Because the endpoint is not shown, the purpose of this network behavior cannot be verified from this report.

Deobfuscation and Analysis Coverage

• Classes in JAR: 156
• Classes parsed successfully: 156
• Classes decompiled successfully: 156
• Parse failures: 0
• Decompiler failures: 0
• Decompiler anomaly classes: 0
• Methods with code inspected: 1,128

There is no reported decompiler failure or broad code-complexity anomaly that would prevent inspection. However, several methods in ItemsOfferHash have random-looking names such as b40x7vhvg7wkm6 and mt45n9vo3simi. Random method names alone do not prove malware, but they reduce readability and make the class harder to independently evaluate.

Is This Minecraft Mod Safe?

This appears to be a Fabric Minecraft mod, based on the included fabric.mod.json file and Minecraft-related class names.

The mod contains several expected features for a client-side utility mod: commands, player-info saving, instruction files, configuration management, documentation generation, auto-trading functionality, and Minescript integration. Those features reasonably explain much of the file access and reflection activity.

The unresolved issue is the ItemsOfferHash class. Its mix of process handling, directory access, networking, and cryptographic routines is not adequately explained by the report’s visible method names or the mod metadata.

What Looks Normal

• A GitHub URL in mod metadata and a website getter is normal.
• Saving/loading configuration files is expected for a Minecraft mod.
• Listing configuration or instruction files is expected for command and GUI features.
• Saving player information can be a legitimate mod feature.
• Reflection can be normal for optional integrations such as Minescript, where the mod dynamically checks whether another component is installed.
• No suspicious third-party shaded libraries were identified.
• Full parsing and decompilation coverage means the scanner was able to inspect all classes without technical failures.

What Is Dangerous

• ItemsOfferHash uses ProcessBuilder and contains a method that accepts a process ID. Process control is not a routine requirement for most Minecraft mods.
• The same class combines filesystem access, directory enumeration, network APIs, Base64/crypto functions, and opaque method names.
• The report flags a network-and-file-operation combination, but does not reveal the remote endpoint or the data involved.
• This behavior is in the mod’s own code, not an identified bundled library.
• There are no major red flags for confirmed credential theft, persistence, or remote control in the report, but the unresolved class is a significant concern.

What Should You Do?

• Do not run this JAR on a computer containing valuable accounts, wallets, private files, or important Minecraft credentials until ItemsOfferHash has been independently reviewed.
• Obtain the mod only from the developer’s official release source, and compare its SHA-256 hash if the publisher provides one.
• Ask the developer to explain the purpose of ItemsOfferHash, especially its process-ID, URL connection, crypto, and file-system code.
• If testing is necessary, use a disposable Minecraft account and a sandboxed virtual machine or separate test system.
• Prefer an independently reviewed build or source release that can be compiled and compared with the downloaded JAR.

Scan Limitations

A static JAR scan examines code patterns and embedded strings, which is useful for finding risky behavior but cannot prove that a file is completely safe. It may not show runtime-generated URLs, encrypted configuration, server-provided code or data, native components loaded later, or whether suspicious methods are actually called.

Frequently Asked Questions

Can a JAR file contain a virus?

Yes. A Java JAR can contain harmful code, including code that reads files, contacts remote servers, launches processes, or downloads additional content. A JAR is not automatically safe just because it is used as a mod or plugin.

How do I check whether a JAR file is safe?

Check its source, publisher, release history, hash, permissions/behavior, and scan results. In this report, normal configuration and command file access is less important than the unexplained ItemsOfferHash class combining process, network, file, and crypto indicators.

Can this scanner detect a Minecraft RAT?

It can detect indicators associated with RAT-like behavior, including remote connections, command execution, persistence-related APIs, and suspicious file access. This report does not confirm a RAT, but it identifies code that needs closer review before the JAR is used.

Does obfuscation mean a JAR is malicious?

No. Obfuscation or unreadable names can be used for intellectual-property protection, compatibility, or code shrinking. In this report, there were no decompiler anomalies, but random-looking method names in the high-concern class make its function less transparent.

Final JAR Safety Verdict

Verdict: Do not trust
Risk level: High
Confidence: Moderate

Should I trust this JAR, and why? No—not without a credible explanation or independent review of ItemsOfferHash. Most findings are ordinary Minecraft mod behavior, including configuration storage, instruction files, player data saving, Minescript integration, and a GitHub project link. But one class in the mod’s own code combines process control, file and directory access, networking, and crypto/Base64 functions behind unclear method names. The scan does not prove malware or a RAT, but this unresolved behavior is too significant to treat as safe for a normal system or main Minecraft account.