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Verdict Suspicious

Analyzed , 4 days ago

Is FastFlagManager_Installer.exe safe? Treat it as suspicious.

Unsigned Roblox flag-manager installer protected with .NET Reactor; no engine detections and clean sandbox runs, but uncorroborated community stealer claims leave its intent…

Read the whole reasonShow less

Why Suspicious? One of our detection rules matched it; nothing else confirms it.

Limited evidence · One sign points to a problem; nothing else confirms it.

Don't install it until you know where it came from

If it came from a link, an attachment or a stranger, delete it.

What to do now4 steps

Some signs point to a problem, but nothing confirms it is harmful. Treat it with caution.

What to do

  1. Don't install it unless you're sure where it came from.

  2. Check where you got it: an unexpected attachment, a link someone sent you or a re-upload is a red flag.

  3. If you can't confirm where it came from, delete it. If you need the program, download it again from the publisher's own website.

If you already installed it

  1. Stop using it, run a full scan with your antivirus and watch for unexpected behavior or security alerts.

Not sure what to do?

Ask the MalwareTips community before you run it. If you already ran it, follow the cleanup guide.

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

Why we think so

Share this file report

FastFlagManager_Installer.exe: Suspicious — 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

0 of 71 flagged

  • Flagged 0
  • No detection 71
  • No result 4
FileFastFlagManager_Installer.exe18.0 MBSHA-256 f8364e020bfd…983a24
  • Code signing Unsigned
  • Test run Completed
  • First seen 5mo ago
1 strong detection rule matched this file.

Chapter 02

Why we think so

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

MT AI Engine · Verdict analysis

The reasoning behind this verdict

Analyst conclusion

None of the 71 antivirus engines that checked it flagged this installer, and the sandbox runs returned clean with no observed injection. It is unsigned and its main code is wrapped in a commercial protector, it contacts a lesser-known domain, and some community annotations allege cookie theft. Those claims could not be confirmed, so the available evidence does not support a firm conclusion either way.

Where this verdict could be wrong2 caveats
  • None of the 71 antivirus engines that checked it flag it, the combined sandbox verdict was clean, and about 2,000 distinct submitters over five months with no detections argues against an active stealer.
  • Community claims of a cookie stealer are unverified opinions, but commercial protectors can hide stealer code from engines, so a clean scan does not fully rule it out.

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 · all complete. 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
  • 20sandbox rule tags
  • 6spawned processes
  • 4network contacts
  • 35filesystem & 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).

  • Moderate concern: Ran commands or a script on the test computer.

  • Moderate concern: Checked whether it was running on a test computer.

  • Note: Read the user name of the test computer.

  • Note: Listed the programs running on the test computer.

  • Note: Deleted files or logs during the test run (installers often clean up after themselves).

  • Note: Talked to servers over the internet during the test run.

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 setting up auto-start; no auto-start entry 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.

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 7: FileSeen in the test run

      FastFlagManager_Installer.exe

      f8364e020bfd2ce12cf2bdc95782d8d2875b708f0321e5904725d02c59983a24

      Uploaded file

  2. Processes

    What ran

    2
    1. Evidence 2 of 7: ProcessSeen in the test run

      FFM_Installer.exe

      "C:\Users\<USER>\Desktop\FFM_Installer.exe"

      Test run
    2. Evidence 3 of 7: ProcessSeen in the test run

      FFM_Installer.tmp

      "C:\Users\<USER>\AppData\Local\Temp\is-F0WD9IJT5F.tmp\FFM_Installer.tmp" /SL5="$5002C,16844716,844288,C:\Users\<USER>\Desktop\FFM_Installer.exe"

      Test run
    3. +1 more recorded observation

  3. Files

    Created or changed

    2
    1. Evidence 4 of 7: Written fileSeen in the test run

      FFM_Installer.tmp

      C:\Users\<USER>\AppData\Local\Temp\is-F0WD9IJT5F.tmp\FFM_Installer.tmp

      Test run
    2. Evidence 5 of 7: Written fileSeen in the test run

      _setup64.tmp

      C:\Users\<USER>\AppData\Local\Temp\is-9R9NI6VKI1.tmp\_isetup\_setup64.tmp

      Test run
    3. +1 more recorded observation

  4. Network

    Hosts contacted

    2
    1. Evidence 6 of 7: Contacted hostSeen in the test run

      imtheo.lol

      Contacted during the test run.

      Test run
    2. Evidence 7 of 7: Contacted hostSeen in the test run

      api.github.com

      Contacted during the test run.

      Test run
    3. +1 more recorded observation

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

Chapter 04

Technical details

None of the 71 antivirus engines that checked it flag it; no publisher signature.

Sources checked

Every check behind this verdict

6 sources checked · all complete. Complete means the check returned a usable result; it does not mean the file is safe.

SourceStatusResultChecked
Antivirus enginesVirusTotal · 75 enginesCompletePositive signal: 0 of 71 engines flagged it · 4 gave no result Details for antivirus engines
Sandbox runVirusTotal sandboxes · C2AE, CAPE Sandbox, VirusTotal JujuboxComplete4 runs: 1 clean, 3 without a verdict Details for sandbox run
Contacted hostsMalwareTips URL scannerComplete7 contacted hosts checked Details for contacted hosts
Signature rulesYARAify community rules + MalwareTips rulesCompleteRisk signal: 2 MalwareTips behaviour rules Details for signature rules
Malware sample databaseabuse.ch MalwareBazaarCompleteNot listed
Known-software referenceCIRCL hashlookupCompleteNo match

File fingerprint

Last analyzed
Oct 21, 2026, 7:29 PM UTC
SHA-256
f8364e020bfd2ce12cf2bdc95782d8d2875b708f0321e5904725d02c59983a24
SHA-1
dd94257dd396fda83f367d8422c241ec0469a561
MD5
6970b1c189d7890631fd756969720d52

About this file

FastFlagManager_Installer.exe says it is Roblox FFlag Manager Setup (Roblox FFlag Manager), 18.0 MB.

Claims to be
Roblox FFlag Manager Setup (Roblox FFlag Manager)From the file's own version information, written by whoever built it.
Type and size
Win32 EXE · 18.0 MB
Signer
UnsignedNo code signature.
First seen
May 16, 2026On VirusTotal.
Submitted by
2,084 distinct sources
Packer
.NET Reactor 2.X-3.X (DetectItEasy protector)Packing hides code; legitimate installers use it too.
Entropy
6.35 of 8

First scanned

Chapter 05

Questions & answers

Short answers to the 6 questions people ask most about this file.

Is FastFlagManager_Installer.exe safe, or is it malware?
FastFlagManager_Installer.exe is rated Suspicious: some signs point to a problem, but nothing confirms it is harmful. No antivirus engine flags it; the caution comes from other evidence, such as who made it, how widely it is used or what it did in a test run. Don't install it unless you're sure where it came from. If you need the software, download a fresh installer from the developer's own website.
What is FastFlagManager_Installer.exe?
FastFlagManager_Installer.exe is a software installer, about 18.0 MB. Its version information says it is “Roblox FFlag Manager Setup” (Roblox FFlag Manager). Version information is written by whoever built the file, so it is a claim, not proof of who made it. VirusTotal first saw it on May 16, 2026.
How many antivirus engines detected FastFlagManager_Installer.exe?
None of the 71 antivirus engines that checked it flag FastFlagManager_Installer.exe. A clean antivirus result is not proof of safety; the caution comes from other evidence, such as who made it, how widely it is used or what it did in a test run.
What should I do if I already installed FastFlagManager_Installer.exe?
No infection is confirmed: the rating is a caution, not a malware finding. 1) Check where it came from. If you can't confirm the source, delete it. 2) Run a full scan with your security software. 3) If the scan finds something, follow its removal steps and change passwords you typed on the device since then.
What is the SHA-256 hash of FastFlagManager_Installer.exe?
The SHA-256 fingerprint of FastFlagManager_Installer.exe is f8364e020bfd2ce12cf2bdc95782d8d2875b708f0321e5904725d02c59983a24, and its MD5 is 6970b1c189d7890631fd756969720d52. 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 FastFlagManager_Installer.exe?
This report reflects the scan on Oct 21, 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.

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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.