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Verdict Malicious

Analyzed , 1 month ago

Is OnlineFix64.dll safe? No, we rate this exact file malicious.

Unsigned 64-bit DLL flagged by 10 major antivirus engines as a game crack/hacktool.

Strong evidence · Two or more major antivirus engines agree.

Don't use this component

Delete the file and scan the system with up-to-date security software; do not attempt to run or trust this DLL.

What to do now4 steps

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

If you haven't used it

  1. Don't use this component. Let your antivirus remove this component, then repair or reinstall the program it belongs to from its official website. Don't delete or replace the file by hand.

If you already used it

  1. Disconnect the device from the internet, then run a full antivirus scan. Microsoft Defender Offline (Windows Security > Virus & threat protection > Scan options) also finds malware that hides while Windows runs.

  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 Windows.

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

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OnlineFix64.dll: Malicious — 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

47 of 70 flagged

  • Flagged 47
  • No detection 23
  • No result 5
FileOnlineFix64.dll13.1 MBSHA-256 d687fcd5d394…c65f99
  • Code signing Unsigned
  • Test run Completed
  • First seen 7mo ago
47 of the 70 antivirus engines that checked it flag it, including Microsoft and ESET.

Chapter 02

Why we think so

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

MT AI Engine · Verdict analysis

The reasoning behind this verdict

Analyst conclusion

47 of the 70 antivirus engines that checked it detect this file, including 10 major antivirus engines that label it a crack or hacktool. The DLL is unsigned, exhibits offensive MITRE techniques, and matches the popular threat label trojan.crack/gamehack.

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
  • 7sandbox rule tags
  • 9spawned processes
  • 0network contacts
  • 10filesystem & 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).

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 cracked-software installers work

A crack or patch installer is one of the most common ways to spread trojans. Even if the program seems to work, it can install malware in the background.

Bottom line:There is no safe copy of a cracked installer: delete it, and get the software from its real publisher.

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

      OnlineFix64.dll

      d687fcd5d3942793218036cde1b8c39d4ada63d2f4aa08778fc2722a4dc65f99

      Uploaded file

  2. Processes

    What ran

    2
    1. Evidence 2 of 5: ProcessSeen in the test run

      rundll32.exe

      "C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\OnlineFix64.dll",#1

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

      rundll32.exe

      Test run
    3. +1 more recorded observation

  3. Files

    Created or changed

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

      MicrosoftWindows.Client.WebExperience_cw5n1h2txyewy!Widgets!!com.msn.desktopfeed

      C:\Users\user\AppData\Local\Packages\Microsoft.WidgetsPlatformRuntime_8wekyb3d8bbwe\LocalState\FeedSessions\MicrosoftWindows.Client.WebExperience_cw5n1h2txyewy!Widgets!!com.msn.desktopfeed

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

      5d033829-386a-448a-981c-68e639f795ab.dat

      C:\Users\user\AppData\Local\Packages\Microsoft.WidgetsPlatformRuntime_8wekyb3d8bbwe\LocalState\FeedSessions\MicrosoftWindows.Client.WebExperience_cw5n1h2txyewy!Widgets!!com.msn.desktopfeed\5d033829-386a-448a-981c-68e639f795ab.dat

      Test run
    3. +1 more recorded observation

5 facts from the test run. See the full activity list.

Chapter 04

Technical details

47 of the 70 antivirus engines that checked it flag it; no publisher signature.

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: 47 of 70 engines flagged it · 5 gave no result Details for antivirus engines
Sandbox runVirusTotal sandboxesCompleteRuntime behaviour was recorded Details for sandbox run
Contacted hostsMalwareTips URL scannerNot neededThe sandbox recorded no contacted hosts to checkNo date recorded
Signature rulesYARAify community rules + MalwareTips rulesCompleteNo rule matched
Malware sample databaseabuse.ch MalwareBazaarCompleteNot listed
Known-software referenceCIRCL hashlookupCompleteNo match

Engines that flagged it 47

  • Avast (major engine)Win64:MalwareX-gen [Misc]
  • AVG (major engine)Win64:MalwareX-gen [Misc]
  • Avira (major engine)TR/W64.Agent
  • BitDefender (major engine)Application.Generic.4799295
  • Emsisoft (major engine)Application.Generic.4799295 (B)
  • ESET-NOD32 (major engine)Win64/HackTool.Crack.AA potentially unsafe application
  • F-Secure (major engine)Trojan.TR/W64.Agent
  • Fortinet (major engine)Riskware/Crack
39 more in the full engine list

File fingerprint

Last analyzed
Sep 7, 2026, 2:01 PM UTC
SHA-256
d687fcd5d3942793218036cde1b8c39d4ada63d2f4aa08778fc2722a4dc65f99
SHA-1
2fcdfea9d8ed56dde71567d2c3c20621e0b12114
MD5
a08579e67f040ceac017a908d252678f

About this file

OnlineFix64.dll is a Win32 DLL file of 13.1 MB.

Type and size
Win32 DLL · 13.1 MB
Signer
UnsignedNo code signature.
First seen
Mar 12, 2026On VirusTotal.
Submitted by
1,475 distinct sources
Packer
None detected
Entropy
7.68 of 8

First scanned

Chapter 05

Questions & answers

Short answers to the 8 questions people ask most about this file.

Is OnlineFix64.dll a virus?
Yes. This copy of OnlineFix64.dll (SHA-256 d687fcd5…5f99) is malicious. Other files with the same name can be different, so check the hash. Don't use it. Let your antivirus remove this component, then repair or reinstall the program it belongs to from its official website. Don't delete or replace the file by hand. 47 of the 70 antivirus engines that checked it flag it. Antivirus engines classify it as a trojan hidden in a cracked-software installer. If you've already used it, see the steps below.
What is OnlineFix64.dll?
OnlineFix64.dll is a Windows library (DLL), about 13.1 MB. It carries no version information saying what it is or who made it. VirusTotal first saw it on Mar 12, 2026.
How many antivirus engines detected OnlineFix64.dll?
47 of the 70 antivirus engines that checked it flag OnlineFix64.dll, including Microsoft and ESET. We weigh which engines flagged it and what else the scan found, not just the count. The rating comes from all the evidence together, not from this count alone.
What should I do if I already used OnlineFix64.dll?
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 Windows.
How do I remove OnlineFix64.dll?
To remove OnlineFix64.dll: 1) run a full scan with your antivirus and let it remove what it finds. 2) Let your antivirus remove this component, then repair or reinstall the program it belongs to from its official website. Don't delete or replace the file by hand. 3) Check Settings > Apps, your browser extensions, startup apps (Task Manager > Startup apps) and scheduled tasks for anything you don't recognise. 4) Restart and scan again. If it keeps coming back, scan from Safe Mode with Networking, or back up your files and reinstall Windows.
What kind of malware is OnlineFix64.dll?
Antivirus engines classify OnlineFix64.dll as a trojan hidden in a cracked-software installer.
What is the SHA-256 hash of OnlineFix64.dll?
The SHA-256 fingerprint of OnlineFix64.dll is d687fcd5d3942793218036cde1b8c39d4ada63d2f4aa08778fc2722a4dc65f99, and its MD5 is a08579e67f040ceac017a908d252678f. 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 OnlineFix64.dll?
This report reflects the scan on Sep 7, 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 name, and recent reports with the same rating. A matching name does not make two files the same: only the SHA-256 fingerprint identifies a file.

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