Is Windows-ISO-Downloader.exe safe?
Zero engine detections but signed by an unknown publisher and exhibits process-injection and persistence techniques.
No antivirus engine flagged the file, yet the sample shows four offensive MITRE techniques and contacts IPs directly. The signer has no established history, and prior imphash matches produced mixed verdicts.
d9e52b0dbb5d354001…d5d93c8b021aefRecommended next actions
Before running
Do not run it until the source and publisher can be verified independently.
If you already ran it
Stop using it, scan the device, and watch for unexpected behavior or security alerts. Get a fresh copy from the developer's official site or an official app store.
Intelligence
The saved assessment, checked against the scan evidence and recorded coverage.
The reasoning behind this verdict
This section explains the evidence supporting the verdict and keeps conflicting or missing signals visible.
No antivirus engine flagged the file, yet the sample shows four offensive MITRE techniques and contacts IPs directly. The signer has no established history, and prior imphash matches produced mixed verdicts.
All 75 engines returned clean, eliminating low-trust false-positive patterns. The file is signed, but the publisher lacks any historical sample count, leaving authenticity unverified. Runtime behaviour includes process injection, service creation, data archiving, and defence-evasion techniques, none of which triggered a malicious sandbox verdict. no complete contacted-host reputation result was available. Similar-hash evidence is split, preventing a decisive safe or malicious call.
What We Detected
Zero of 75 engines flagged the 7.3 MB executable. The binary is signed by HeiDoc V.O.F., yet the signer has no prior sample history in our records. One sandbox recorded four MITRE techniques normally associated with malware: process injection (T1055), service creation (T1543.003), data archiving (T1560.002), and defence evasion (T1562.001). Network activity reached 15 external IPs and several legitimate domains; none of those hosts appear in our malicious cache.
Threat Behavior
Direct-IP connections and the listed MITRE techniques raise the possibility of command-and-control or persistence activity. However, the sandbox produced no malicious verdict, and dropped children were all scored unknown. The imphash matches prior samples whose verdicts ranged from safe to malicious, weakening any single conclusion.
What To Do Now
Keep Windows Defender and other endpoint protection enabled. If the file is required, run it only in a disposable virtual machine and monitor for unexpected outbound traffic or new services. Consider obtaining the tool from its official site to confirm provenance.
Where this verdict could be wrong2 caveats
- CIRCL hit lists knownMalicious=malshare.com, but no tier-1 engine or sandbox verdict corroborates maliciousness.
- 4 offensive MITRE techniques observed, yet sandboxVerdicts empty and hasMaliciousSandboxVerdict=false.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- Zero detections across 75 engines
- All no complete contacted-host reputation result was available
- No malicious dropped children
- Four offensive MITRE techniques observed
- Signer has no historical reputation data
- Direct-IP network traffic without domain names
Treat the file as untrusted until the publisher’s legitimacy can be independently verified; run only in an isolated environment if testing is necessary.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 75 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial8 of 28 contacted hosts were cross-checked; coverage is incomplete.
YARA
Complete2 signature or behavior rules matched.
External intel
Complete3 of 3 independent reference sources completed.
Behavior
Plain-English impact first, then the observed runtime evidence.
Runtime flight recorder
Capture complete- 1isolated sandbox run
- 26MITRE ATT&CK techniques
- 15spawned processes
- 40network contacts
- 40filesystem & mutex artifacts
What this file does
Observed actions and their security significance
High concern: Created or modified a scheduled task, which can provide persistence.
High concern: Injected code into another process, a technique that can conceal execution.
High concern: Used an input-capture technique that can record credentials or keystrokes.
High concern: Created or modified a system service, which can keep code running.
High concern: Changed an auto-start location that can make code run after sign-in or restart.
High concern: Attempted to impair or bypass security controls.
High concern: Manipulated how the operating system loads code, which can redirect execution.
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.
Attack story
Runtime observations grouped by analysis stage. Arrows organize the stages; they do not claim chronology or causality.
Input file
The submitted object
- FileObserved
Windows-ISO-Downloader.exe
d9e52b0dbb5d3540016497c913e4186433c2ecd14e359eb841d5d93c8b021aef
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\<USER>\Desktop\software.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\system32\services.exe
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
08c5d47c-be1d-4774-8f53-ef07e260e4dd.css
C:\Users\<USER>\AppData\Local\Temp\08c5d47c-be1d-4774-8f53-ef07e260e4dd.css
04Isolated runtime analysis - Written fileObserved
bf46cc0a-3781-4c4f-90fc-836bc611aa03.js
C:\Users\<USER>\AppData\Local\Temp\bf46cc0a-3781-4c4f-90fc-836bc611aa03.js
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
204.79.197.203
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
172.217.214.94
Contact observed during runtime.
07Isolated runtime analysis - +1 more recorded observation in Analyst mode
7 recorded facts from one runtime window. Every fact remains independently traceable in Analyst mode.
What this file did when executed
This file was detonated in 1 sandbox and its runtime behaviour was observed.
Adversary techniques mapped to the MITRE ATT&CK framework.
- 204.79.197.203
- 172.217.214.94
- 104.168.147.90
- 74.125.26.91
- 74.125.134.156
- 173.194.212.148
- 192.168.0.45
- 172.217.14.202
- 142.250.217.99
- 142.251.33.99
- https://www.heidoc.net:443/php/whatsnew.html
- https://www.heidoc.net:443/php/newadditions.php
- https://www.heidoc.net:443/php/isocachev8.php
- https://fonts.googleapis.com:443/css2?family=Open+Sans:ital,wght@0,400;0,700;1,400;1,700&display=swap
- https://fonts.gstatic.com:443/s/opensans/v18/mem8YaGs126MiZpBA-U1Uw.eot
- https://www.youtube.com:443/embed/6jzQ9QVqexw?rel=0
- C:\Users\<USER>\AppData\Local\Temp\08c5d47c-be1d-4774-8f53-ef07e260e4dd.css
- C:\Users\<USER>\AppData\Local\Temp\bf46cc0a-3781-4c4f-90fc-836bc611aa03.js
- C:\Users\<USER>\AppData\Local\Temp\b3f3307a-2293-4b39-a552-a4f95d10306e.js
- C:\Users\<USER>\AppData\Local\Temp\4cf5c923-af61-4de1-a31f-b562e466a34d.css
- C:\Users\<USER>\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\QYXWK8LT\sslnavcancel[1]
- %USERPROFILE%\AppData\Local\Microsoft\Internet Explorer\DOMStore\LKWCDQZ6\www.youtube[1].xml
- %USERPROFILE%\AppData\Local\Microsoft\Windows\INetCookies\NV1Z4P7M.cookie
- C:\Windows\System32\spp\store\2.0\cache\cache.dat
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER338E.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER3572.tmp.csv
- Local\ZonesCacheCounterMutex
- Local\ZonesLockedCacheCounterMutex
- Local\MSIMGSIZECacheMutex
- Local\InternetExplorerDOMStoreQuota
- Local\http://www.youtube.com/
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 9aa54eebc26ba33d5c46…7c4594Never scannednever seen before
- ff1bc0cb59a3526aaa3b…c5d909Never scannednever seen before
- bef5223dc4cfbd7a9c11…32ffe0Never scannednever seen before
- 0b3b6494146b4568b991…afd4b3Never scannednever seen before
- f7a45fdf39566fd1a28e…a4c9e7Never scannednever seen before
- 830d75bbf0e1f9289d78…55d198Never scannednever seen before
- c8f7edc9cbd795e949ff…352770Never scannednever seen before
- ce85352b0d6e3a31181e…ea3bdbNever scannednever seen before
- c839ac22c73fc1b029b2…45d49bNever scannednever seen before
- 47f5b679692a65119826…c323e7Never scannednever seen before
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
Evidence integrity
Chain of custody for the facts preserved in this report.
- 2rule hits recorded
- 0 / 75engines flagged
- 3,671sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 02
0 of 75 antivirus engines flagged the file.
ProvenanceObservedSourceAntivirus analysisObserved at - 03
The hash has a long, established submission history across 3,671 sources.
ProvenanceDerivedSourceSubmission historyObserved at - 04
Scanned file: Windows-ISO-Downloader.exe — d9e52b0dbb5d3540016497c913e4186433c2ecd14e359eb841d5d93c8b021aef
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Users\<USER>\Desktop\software.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\system32\services.exe
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: 08c5d47c-be1d-4774-8f53-ef07e260e4dd.css — C:\Users\<USER>\AppData\Local\Temp\08c5d47c-be1d-4774-8f53-ef07e260e4dd.css
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: bf46cc0a-3781-4c4f-90fc-836bc611aa03.js — C:\Users\<USER>\AppData\Local\Temp\bf46cc0a-3781-4c4f-90fc-836bc611aa03.js
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 204.79.197.203 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 172.217.214.94 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at
Detection sources at a glance
The available sources did not agree on a named threat category.
One or more independent reference databases matched this hash.
Signatures and behavior heuristics
A community signature or high-severity behavioral heuristic matched. Signatures identify known patterns; heuristics are strong leads but are not proof on their own.
The saved runtime evidence maps this activity to MITRE T1055 (Process Injection). The mapping supports possible process injection, but it does not prove the exact injection method or the operator's intent.
Evidence"C:\Users\<USER>\Desktop\software.exe"The sample contacted an external IP address directly and no application domain was recorded. Direct-IP traffic also occurs in legitimate installers and infrastructure, so this is supporting context only and requires corroboration from host reputation and other runtime evidence.
Evidence204.79.197.203 · 172.217.214.94 · 104.168.147.90
0 of 75 engines flagged this file
View all 75 engine results
Section entropy & packers
No high-entropy executable section or known packer signature was detected. Data and resource sections can still have high entropy without indicating packed code.
How widely this file has been seen
Widely seen in the wild for a long time. High prior this is legitimate; isolated detections on common-old files are usually false positives.
Fingerprint and provenance
- File name
- Windows-ISO-Downloader.exe
- Format
- Win32 EXE
- Code signing
- Signature not verified: HeiDoc V.O.F.
- Size
- 7.0 MB
- Last analyzed
- Sep 5, 2026, 4:41 PM UTC
d9e52b0dbb5d3540016497c913e4186433c2ecd14e359eb841d5d93c8b021aefSafety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
We couldn't fully clear this file. Treat it with caution.
- Recovery step 01
Don't run it unless you're certain it came from a source you trust.
- Recovery step 02
Check where you got it — an unexpected attachment or a random download link is a red flag.
- Recovery step 03
If its origin cannot be confirmed, delete this file and use a fresh copy from a trusted source. Get a fresh copy from the developer's official site or an official app store.
- Recovery step 04
If you're still unsure, scan it again in a day or two — detections often catch up on newer files.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is Windows-ISO-Downloader.exe safe, or is it malware?
What is Windows-ISO-Downloader.exe?
How many antivirus engines detected Windows-ISO-Downloader.exe?
What should I do if I already ran Windows-ISO-Downloader.exe?
How do I remove Windows-ISO-Downloader.exe?
Is Windows-ISO-Downloader.exe digitally signed?
What is the SHA-256 hash of Windows-ISO-Downloader.exe?
How up to date is this analysis of Windows-ISO-Downloader.exe?
Community
Member reviews and reports for this exact file hash.