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Verdict Malicious

Analyzed , 3 months ago

Is STRUCKTOR_UK_ST8960047-2026_07_13.com safe? No, we rate this exact file malicious.

Unsigned NSIS executable flagged by Kaspersky and Rising as GuLoader/NSIS downloader with token-manipulation behaviour.

Read the whole reasonShow less

Moderate evidence · Several antivirus engines agree.

Don't run this file

If you already ran it, follow the steps below.

What to do now4 steps

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

If you haven't run it

  1. Don't run this file. Delete it, then empty the Recycle Bin.

If you already ran 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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STRUCKTOR_UK_ST8960047-2026_07_13.com: 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

8 of 59 flagged

  • Flagged 8
  • No detection 51
  • No result 15
FileSTRUCKTOR_UK_ST8960047-2026_07_13.com687.1 kBSHA-256 64e87caa73ab…1571c1
  • Code signing Unsigned
  • Test run Completed
  • First seen 3mo ago
8 of the 59 antivirus engines that checked it flag it, including Kaspersky and CrowdStrike.

Chapter 02

Why we think so

4 points against it and 3 in its favour, checked against the scan evidence.

MT AI Engine · Verdict analysis

The reasoning behind this verdict

Analyst conclusion

Eight engines detected the sample, including one major antivirus engine naming NSIS.Agent and another explicitly calling GuLoader/NSIS. The file is unsigned, and drops multiple files under AppData while using token manipulation.

Where this verdict could be wrong2 caveats
  • No sandbox verdicts, no malicious files it created, no contacted malicious hosts — behaviour in the test run lacks direct a control server or payload execution confirmation.
  • No YARAify or CIRCL hits; similarHashes empty — external researcher corroboration is absent.

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 · 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
  • 14sandbox rule tags
  • 0spawned processes
  • 0network contacts
  • 15filesystem & 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.

  • Note: Read basic details of the test computer, such as its Windows version.

  • Note: Looked through folders on the test computer (most installers do this).

  • Note: Loaded extra code modules while running.

Sandbox labels we could not confirm (common in safe files too)

  • Not confirmed: A sandbox rule tagged this run as setting up auto-start; no auto-start entry 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.

Threat context

How downloaders work

This file is a delivery vehicle. On its own it can look small and harmless, but its job is to fetch and install the real payload, often a password stealer, ransomware or a bot, from a server the attacker controls.

Bottom line:Because the dangerous part arrives later, early scans can look cleaner than the threat really is.

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 3: FileSeen in the test run

      STRUCKTOR_UK_ST8960047-2026_07_13.com

      64e87caa73abf5463fccec3a7adc55ec1395fffb315e0380f6a4da94b21571c1

      Uploaded file

  2. Files

    Created or changed

    2
    1. Evidence 2 of 3: Written fileSeen in the test run

      Cnidarian

      C:\Users\<USER>\AppData\Roaming\Microsoft\Windows\Templates\glutamine\konsummlks\Cnidarian

      Test run
    2. Evidence 3 of 3: Written fileSeen in the test run

      Encyclicals.voa

      C:\Users\<USER>\AppData\Roaming\Microsoft\Windows\Templates\glutamine\konsummlks\Encyclicals.voa

      Test run
    3. +1 more recorded observation

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

Chapter 04

Technical details

8 of the 59 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 · 74 enginesCompleteRisk signal: 8 of 59 engines flagged it · 15 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 8

  • Kaspersky (major engine)VHO:Trojan.NSIS.Agent.gen
  • APEXMalicious
  • CrowdStrikewin/malicious_confidence_70% (D)
  • CylanceUnsafe
  • Elasticmalicious (high confidence)
  • huorongHEUR:Trojan/Runner.o
  • Kingsoftmalware.kb.a.741
  • RisingDownloader.GuLoader/NSIS!1.130AA (CLASSIC)

File fingerprint

Last analyzed
Jul 13, 2026, 1:05 PM UTC
SHA-256
64e87caa73abf5463fccec3a7adc55ec1395fffb315e0380f6a4da94b21571c1
SHA-1
522b62f8ef1624eda1b4f2dc11fabc781feb0fad
MD5
b5e67798daa4de43626378707f3354d8

About this file

STRUCKTOR_UK_ST8960047-2026_07_13.com is a Win32 EXE file of 687.1 kB.

Type and size
Win32 EXE · 687.1 kB
Signer
UnsignedNo code signature.
First seen
Jul 13, 2026On VirusTotal.
Submitted by
1 sourceRarely seen: few people have submitted this exact file.
Packer
None detected
Entropy
7.99 of 8

First scanned

Verdict history

  1. Not fully confirmed
  2. Maliciousafter 8 more engines flagged it

Ratings change when antivirus engines, our checks or MalwareTips staff learn more about a file.

Chapter 05

Questions & answers

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

Is STRUCKTOR_UK_ST8960047-2026_07_13.com malware?
Yes. This copy of STRUCKTOR_UK_ST8960047-2026_07_13.com (SHA-256 64e87caa…71c1) is malicious. Other files with the same name can be different, so check the hash. Don't run it. Delete it, then empty the Recycle Bin. 8 of the 59 antivirus engines that checked it flag it, some as guloader. Antivirus engines classify it as a downloader whose job is to fetch more malware onto the device. If you've already run it, see the steps below.
What is STRUCKTOR_UK_ST8960047-2026_07_13.com?
STRUCKTOR_UK_ST8960047-2026_07_13.com is a Windows program, about 687.1 kB. It carries no version information saying what it is or who made it. VirusTotal first saw it on Jul 13, 2026.
How many antivirus engines detected STRUCKTOR_UK_ST8960047-2026_07_13.com?
8 of the 59 antivirus engines that checked it flag STRUCKTOR_UK_ST8960047-2026_07_13.com, including Kaspersky and CrowdStrike. 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.
I already downloaded and ran STRUCKTOR_UK_ST8960047-2026_07_13.com — what should I do?
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 STRUCKTOR_UK_ST8960047-2026_07_13.com?
To remove STRUCKTOR_UK_ST8960047-2026_07_13.com: 1) run a full scan with your antivirus and let it remove what it finds. 2) Delete it, then empty the Recycle Bin. 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 STRUCKTOR_UK_ST8960047-2026_07_13.com?
Antivirus engines classify STRUCKTOR_UK_ST8960047-2026_07_13.com as a downloader whose job is to fetch more malware onto the device. Engines attribute it to the guloader family.
What is the SHA-256 hash of STRUCKTOR_UK_ST8960047-2026_07_13.com?
The SHA-256 fingerprint of STRUCKTOR_UK_ST8960047-2026_07_13.com is 64e87caa73abf5463fccec3a7adc55ec1395fffb315e0380f6a4da94b21571c1, and its MD5 is b5e67798daa4de43626378707f3354d8. 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 STRUCKTOR_UK_ST8960047-2026_07_13.com?
This report reflects the scan on Jul 13, 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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Recent reports on other files with the same rating.

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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.