Malicious
Unsigned NSIS executable flagged by Kaspersky and Rising as GuLoader/NSIS downloader with token-manipulation behaviour.
64e87caa73abf5463f…94b21571c1The reasoning behind this verdict
The MT AI Engine weighs every signal from this scan — antivirus detections, sandbox behaviour, code signing, prevalence and historical matches — to reach a single, evidence-based verdict.
The combination of a tier-1 detection on a known NSIS downloader family, explicit GuLoader label from Rising, and offensive MITRE technique T1134 outweighs the limited tier-1 consensus. Zero signer history and rare_new prevalence further reduce the chance of a benign installer. Sandbox and child-file signals are absent, but the engine labels and dropped-file pattern are consistent with GuLoader loaders.
Each signal cites a concrete token from the evidence the arbiter saw — engine name, MITRE technique, signer string, or an exact count.
engines.tier1Malicious=1 (Kaspersky VHO:Trojan.NSIS.Agent.gen)
popularThreatLabel=trojan.nsis/guloader and Rising label=Downloader.GuLoader/NSIS
behaviour.offensiveTechniques=T1134 and 8 files written under AppData\Roaming\Microsoft\Windows\Templates\glutamine
prevalence.classification=rare_new, ageDays=0, signing.verified=false
engines.reporting=60, tier1FamilyConsensus.strong=false
- No malicious sandbox verdict
- No malicious dropped children
- No contacted malicious hosts
- Unsigned executable
- Rare new prevalence
- T1134 token manipulation
- GuLoader/NSIS engine labels
Block the hash and avoid execution; treat as a GuLoader downloader until further sandbox confirmation.
What this file does
What it attempted when executed in an isolated sandbox
High concern: Sets itself to run automatically every time you start your PC.
Moderate concern: Obfuscates or packs its code to avoid detection.
Moderate concern: Runs hidden system commands (script or shell).
Moderate concern: Scans through your files and folders.
Note: Collects details about your system.
Note: Loads extra code modules while running.
Translated from the file's technical behaviour during analysis. It never ran on your device.
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 quietly pull down and install the REAL payload — often a stealer, ransomware, or 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.
What to do now
This file is dangerous. Treat it as harmful and remove it.
Don't open or run this file. Delete it from your Downloads (or wherever you saved it), then empty the Recycle Bin.
If you already opened it, disconnect from the internet and run a full scan with your antivirus — Windows Security, built into Windows, is sufficient.
If you typed any passwords while it was open, change them from a device you trust.
In future, only download software from the official website or an official app store.
nsis corroborated by 2 sources
- VT (74 engines)nsis
- MT AI Engineguloader
Files this sample writes at runtime
This file drops 8 children at runtime. None are currently flagged malicious in our cache.
- 7755d98c6798e92d5a4c…806344Never scannednever seen before
- 475001c1457f149f3dac…ceece0Never scannednever seen before
- 76bd5c4a138361ac9a5d…de6917Never scannednever seen before
- 795ce9b5df889047897e…ef2f2dNever scannednever seen before
- 439ebd6843acf2406429…9104c9Never scannednever seen before
- 85fb6d6a7ff0219723be…f8c1bdNever scannednever seen before
- e0b217e3dbdc10de2642…3c6cb7Never scannednever seen before
- 7a9ddee34562cd3703f1…6cb2a5Never scannednever seen before
8 detections across 74 engines
Section entropy & packers
Section-level entropy and packer detection from the PE header. Nothing suspicious here — entropy is within the normal range for unpacked code.
How widely this file has been seen
Barely seen in the wild and first surfaced recently. This is the footprint of targeted malware the AV industry hasn't signatured yet — extra scrutiny is warranted.
Forensic fingerprint
- File name
- STRUCKTOR_UK_ST8960047-2026_07_13.com
- Size
- 671.0 KB
- MIME type
- application/octet-stream
- Detected type
- Win32 EXE
- SHA-256
- 64e87caa73abf5463fccec3a7adc55ec1395fffb315e0380f6a4da94b21571c1
- MD5
- b5e67798daa4de43626378707f3354d8
- SHA-1
- 522b62f8ef1624eda1b4f2dc11fabc781feb0fad
- PE imphash
- 6e7f9a29f2c85394521a08b9f31f6275
- First seen (VT)
- 7/13/2026, 9:01:22 AM
- Last analysis (VT)
- 7/13/2026, 9:01:22 AM
- First scan (MalwareTips)
- 7/13/2026, 9:02:35 AM
- Last scan (MalwareTips)
- 7/13/2026, 9:05:51 AM
Safety FAQ
Common questions about STRUCKTOR_UK_ST8960047-2026_07_13.com, answered from the scan data above.
- Yes — STRUCKTOR_UK_ST8960047-2026_07_13.com is malicious, so do not run it, and delete it. 8 of 74 antivirus engines flag it (family: guloader). It behaves as a downloader/dropper whose job is to pull additional malware onto the device. If you've already run it, see the removal and recovery steps below.
- STRUCKTOR_UK_ST8960047-2026_07_13.com is a Windows executable program (application/octet-stream), about 671 KB. Our analysis identifies it as malicious (family: guloader) — a downloader/dropper whose job is to pull additional malware onto the device. 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.
- 8 of 74 antivirus engines flagged STRUCKTOR_UK_ST8960047-2026_07_13.com, 8 of them as outright malicious. A detection rate at this level is a reliable signal that the file is dangerous.
- 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.
- To remove STRUCKTOR_UK_ST8960047-2026_07_13.com: 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 the original STRUCKTOR_UK_ST8960047-2026_07_13.com file and empty the Recycle Bin/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.
- STRUCKTOR_UK_ST8960047-2026_07_13.com is classified as a downloader/dropper whose job is to pull additional malware onto the device. Engines attribute it to the guloader 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.
- The SHA-256 hash of STRUCKTOR_UK_ST8960047-2026_07_13.com is 64e87caa73abf5463fccec3a7adc55ec1395fffb315e0380f6a4da94b21571c1, and its MD5 is b5e67798daa4de43626378707f3354d8. 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.
- This report reflects the scan run on July 13, 2026. Because a file's hash never changes, the identity of STRUCKTOR_UK_ST8960047-2026_07_13.com 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.
Reviews & malware reports(0)
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