MalwareTips
Threat LensFile scan report

Is Extreme.Injector.v3.7.3.-.by.master131.rar safe?

Verdict
Malicious

Multiple tier-1 engines confirm injection and hacktool functionality, while the archive extracts a child detected by 53 of 75 antivirus engines.

This archive contains a confirmed DLL-injection tool, with 49 of 75 engines flagging it and 11 tier-1 engines contributing independent detections. One extracted child was also detected by 53 of 75 engines, so the file should not be opened or executed.

Do not open or extract this archive

Quarantine or delete the archive and do not extract its contents. If execution already occurred, keep protection enabled, perform a full scan, and investigate running processes for injection activity.

Read the full analysis
Saved file evidenceAntivirus consensus
49of 75 flagged
Flagged 49No detection 26
Digital specimenExtreme.Injector.v3.7.3.-.by.master131.rar93dda8b91586acf53c…ad67190361bce8
Size1.2 MB
Code signingNot applicable
SandboxRuntime complete
First seen9y ago
Evidence3 priority signals
The file created or unpacked 1 malicious payload.

Recommended next actions

01

Before opening or extracting

Do not open or extract it. Delete this archive from the device, then empty the Recycle Bin or Trash.

02

If you already opened or extracted it

Close it. If it opened links, requested credentials, or triggered unexpected behavior, disconnect from the internet and run a full device scan.

Chapter 02

Intelligence

The saved assessment, checked against the scan evidence and recorded coverage.

MT AI Engine · Verdict analysis

The reasoning behind this verdict

This section explains the evidence supporting the verdict and keeps conflicting or missing signals visible.

99%Confidence
Very high
Analyst conclusion

This archive contains a confirmed DLL-injection tool, with 49 of 75 engines flagging it and 11 tier-1 engines contributing independent detections. One extracted child was also detected by 53 of 75 engines, so the file should not be opened or executed.

Where this verdict could be wrong3 caveats
  • behaviour.sandboxVerdicts contains one clean result, but that conflicts with the confirmed injector classification and malicious dropped child.
  • externalIntel.yaraify.ruleCount=0, externalIntel.circl.hit=false, and externalIntel.malwareBazaar.hit=false; these absences may reflect coverage limitations rather than exoneration.
  • The archive is common and long-established, with prevalence.uniqueSources=3728 and prevalence.timesSubmitted=19573, but prevalence does not neutralize confirmed offensive tooling.

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

Quarantine or delete the archive and do not extract its contents. If execution already occurred, keep protection enabled, perform a full scan, and investigate running processes for injection activity.

Scan transparency

Coverage & freshness

4 of 5 complete

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

  • Antivirus

    Complete

    49 of 75 engines flagged the file.

  • Sandbox

    Complete

    1 isolated runtime environment contributed observations.

  • Network

    Partial

    1 of 4 contacted hosts were cross-checked; coverage is incomplete.

  • YARA

    Complete

    Rule evaluation completed with no recorded matches.

  • 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
  • 13spawned processes
  • 5network contacts
  • 11filesystem & mutex artifacts

What this file does

Observed actions and their security significance

  • High concern: Drops additional malware files onto your PC when it runs.

  • High concern: Used an input-capture technique that can record credentials or keystrokes.

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

  • High concern: Manipulated how the operating system loads code, which can redirect execution.

  • Moderate concern: Contained obfuscated or packed code that makes inspection harder.

  • Moderate concern: Communicated over a common application protocol; malware can use this for command-and-control.

  • Moderate concern: Communicates over the network in a non-standard way.

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 hacktools are abused

This is a hacking or cracking tool — the kind used to bypass software licences, generate fake keys, or attack other systems. Even when the tool 'works', these downloads very often carry hidden malware.

Bottom line:Running one means trusting an anonymous author with full access to your PC — rarely worth the risk.

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 extract this archive. Delete this archive from the device, then empty the Recycle Bin or Trash.

  2. Recovery step 02

    If you already opened or extracted 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

    From a different, clean device, change the passwords on your important accounts (email and banking first) and turn on two-factor authentication.

  4. Recovery step 04

    It can drop extra files, so run a full system scan — not just a quick one — to catch anything it left behind.

  5. Recovery step 05

    Get a fresh copy from the original trusted source and verify its exact hash when possible.

Safety FAQ

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

8 evidence-based answers
Is Extreme.Injector.v3.7.3.-.by.master131.rar a virus?
Evidence-based answer
Yes — Extreme.Injector.v3.7.3.-.by.master131.rar is malicious. Do not open or extract it. Delete this archive from the device, then empty the Recycle Bin or Trash. 49 of 75 antivirus engines flag it (family: Extreme Injector). It behaves as a hacktool — dual-use offensive tooling that is dangerous regardless of intent. If you've already opened or extracted it, see the removal and recovery steps below.
What is Extreme.Injector.v3.7.3.-.by.master131.rar?
Evidence-based answer
Extreme.Injector.v3.7.3.-.by.master131.rar is a compressed archive, about 1.2 MB. Our analysis identifies it as malicious (family: Extreme Injector) — a hacktool — dual-use offensive tooling that is dangerous regardless of intent. 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 Extreme.Injector.v3.7.3.-.by.master131.rar?
Evidence-based answer
49 of 75 antivirus engines flagged Extreme.Injector.v3.7.3.-.by.master131.rar, 49 of them as outright malicious. The raw count alone does not establish safety or danger; we also weigh which engines flagged it and corroborating behavior, identity, reputation, and rule evidence. The malicious verdict is supported by a malicious child payload created or unpacked during analysis and by the wider saved evidence.
What should I do if I already opened or extracted Extreme.Injector.v3.7.3.-.by.master131.rar?
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 Extreme.Injector.v3.7.3.-.by.master131.rar?
Evidence-based answer
To remove Extreme.Injector.v3.7.3.-.by.master131.rar: 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 archive 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 Extreme.Injector.v3.7.3.-.by.master131.rar?
Evidence-based answer
Extreme.Injector.v3.7.3.-.by.master131.rar is classified as a hacktool — dual-use offensive tooling that is dangerous regardless of intent. Engines attribute it to the Extreme Injector 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.
What is the SHA-256 hash of Extreme.Injector.v3.7.3.-.by.master131.rar?
Evidence-based answer
The SHA-256 hash of Extreme.Injector.v3.7.3.-.by.master131.rar is 93dda8b91586acf53c70dfd3f512fcff5793a9af69e174d7e3ad67190361bce8, and its MD5 is 90064f3c81022f4beb1b660ea21f16c7. 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 Extreme.Injector.v3.7.3.-.by.master131.rar?
Evidence-based answer
This report reflects the scan run on September 26, 2026. Because a file's hash never changes, the identity of Extreme.Injector.v3.7.3.-.by.master131.rar 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.