Is W-KemonoDownloader-4.3.0-x86_64-Portable.exe safe?
This unsigned portable executable exhibits suspicious direct-IP network communication and is associated with multiple malware family reports in community research, despite low detection rates from high-trust antivirus engines.
Our analysis identifies this file as suspicious due to its lack of a digital signature and the use of direct-IP communication, which often bypasses security filters. While high-trust engines currently report it as clean, community research links this specific hash to known malware families, suggesting it may be a malicious component.
4a9d373f2d2e828431…13051ea983e5c1Recommended 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.
Our analysis identifies this file as suspicious due to its lack of a digital signature and the use of direct-IP communication, which often bypasses security filters. While high-trust engines currently report it as clean, community research links this specific hash to known malware families, suggesting it may be a malicious component.
The file is unsigned and lacks a verifiable publisher, which is atypical for software of this nature. The detection of direct-IP communication without DNS resolution is a strong indicator of evasive behavior often seen in malicious software. Although the majority of antivirus engines do not flag the file, the combination of the 'MalwareTips.Synth.DirectIpC2' heuristic hit and external researcher annotations linking it to known threats creates a significant risk profile. We categorize this as suspicious due to these mixed signals and the potential for it to act as a downloader or dropper.
What We Detected
The file is an unsigned 64-bit portable executable. While 72 of 74 engines currently do not flag the file, it has been identified by community researchers as potentially related to various malware families, including infostealers and remote access tools.
Threat Behavior
The sample demonstrated suspicious network behavior by initiating connections to 15 distinct external IP addresses without performing any DNS lookups. This behavior is a common technique used by malicious software to evade domain-based reputation and blocking systems. Furthermore, the file is unsigned, preventing verification of its origin or integrity.
What To Do Now
Given the suspicious network activity and the lack of a valid digital signature, we recommend treating this file as untrusted. Do not execute it on production systems. If this file was obtained from an unofficial source, delete it immediately and perform a full system scan with updated security software.
Where this verdict could be wrong3 caveats
- The majority of engines (72/74) and all 17 tier-1 engines currently report the file as clean.
- No malicious sandbox verdict was returned during the analysis run.
- No malicious children were identified among the 10 inspected dropped files.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- No tier-1 engine detections
- No malicious sandbox verdict
- No malicious dropped children
- Unsigned executable
- Direct-IP C2 communication
- Community reports of malware association
- High entropy in sections
- Portable executable format
Do not execute this file. It is unsigned and exhibits evasive network behavior consistent with malicious software.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete2 of 74 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial18 runtime contacts were observed without a completed reputation cross-check.
YARA
Complete1 signature or behavior rule 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
- 11MITRE ATT&CK techniques
- 13spawned processes
- 18network contacts
- 16filesystem & mutex artifacts
What this file does
Observed actions and their security significance
Moderate concern: Contained obfuscated or packed code that makes inspection harder.
Moderate concern: Runs hidden system commands (script or shell).
Moderate concern: Communicated over a common application protocol; malware can use this for command-and-control.
Moderate concern: Scans through your files and folders.
Moderate concern: Checked the environment for virtualisation or analysis tools.
Note: Listed running processes; both legitimate software and malware may do this.
Note: Collects details about your system.
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
W-KemonoDownloader-4.3.0-x86_64-Portable.exe
4a9d373f2d2e828431b1e41df097281a15a22a1e4754cf05f013051ea983e5c1
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\<USER>\Desktop\executable.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\system32\cmd.exe /c "ver"
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
MSVCP140.dll
C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\MSVCP140.dll
04Isolated runtime analysis - Written fileObserved
MSVCP140_1.dll
C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\MSVCP140_1.dll
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
140.82.113.5
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
23.46.228.41
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.
- 140.82.113.5
- 23.46.228.41
- 23.196.145.221
- 23.32.75.29
- 192.168.0.33
- 23.55.140.42
- 23.220.75.246
- 23.221.103.220
- 20.69.140.28
- 217.20.54.36
- C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\MSVCP140.dll
- C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\MSVCP140_1.dll
- C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\MSVCP140_2.dll
- C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\Qt6Core.dll
- C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\Qt6Gui.dll
- Local\SessionImmersiveColorMutex
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- d06a91324ec9a9a68ea5…1425d5Never scannednever seen before
- c585918fb1d4821a054e…ac7e8fNever scannednever seen before
- 8c98b5ee246e18397d0d…5b34deNever scannednever seen before
- f41e33e1d790bd0d3eb1…e66867Never scannednever seen before
- 81da2f88cd624097581f…542d28Never scannednever seen before
- fc9e4146f33be3d09b23…3a61a7Never scannednever seen before
- 655f4f9afa55897a6df5…cf9485Never scannednever seen before
- 2ec955e662407ebcd8dc…43535fNever scannednever seen before
- c44e0313a9414cc0e490…92034fNever scannednever seen before
- ef6bf5f66c468d29ac6a…6c78dcNever 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.
- 1rule hit recorded
- 2 / 74engines flagged
- 542sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
2 of 74 antivirus engines flagged the file, including APEX and Bkav.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The hash has a long, established submission history across 542 sources.
ProvenanceDerivedSourceSubmission historyObserved at - 03
The hash has been submitted 592 times from 542 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: W-KemonoDownloader-4.3.0-x86_64-Portable.exe — 4a9d373f2d2e828431b1e41df097281a15a22a1e4754cf05f013051ea983e5c1
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Users\<USER>\Desktop\executable.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\system32\cmd.exe /c "ver"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: MSVCP140.dll — C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\MSVCP140.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: MSVCP140_1.dll — C:\Users\<USER>\AppData\Local\Temp\_MEI61162\PyQt6\Qt6\bin\MSVCP140_1.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 140.82.113.5 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 23.46.228.41 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at
Detection sources at a glance
Category: generic-trojan
MalwareBazaar, YARAify, and CIRCL hashlookup completed and returned no entries for this hash.
Signatures and behavior heuristics
Behavioral heuristics matched patterns associated with malware. Corroborating evidence determines how much weight they carry.
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.
Evidence140.82.113.5 · 23.46.228.41 · 23.196.145.221
2 of 74 engines flagged this file
View all 74 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
- W-KemonoDownloader-4.3.0-x86_64-Portable.exe
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 51.3 MB
- Last analyzed
- Jul 23, 2026, 8:21 PM UTC
4a9d373f2d2e828431b1e41df097281a15a22a1e4754cf05f013051ea983e5c1Safety & 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 W-KemonoDownloader-4.3.0-x86_64-Portable.exe safe, or is it malware?
What is W-KemonoDownloader-4.3.0-x86_64-Portable.exe?
How many antivirus engines detected W-KemonoDownloader-4.3.0-x86_64-Portable.exe?
I already downloaded and ran W-KemonoDownloader-4.3.0-x86_64-Portable.exe — what should I do?
How do I remove W-KemonoDownloader-4.3.0-x86_64-Portable.exe?
What kind of malware is W-KemonoDownloader-4.3.0-x86_64-Portable.exe?
What is the SHA-256 hash of W-KemonoDownloader-4.3.0-x86_64-Portable.exe?
How up to date is this analysis of W-KemonoDownloader-4.3.0-x86_64-Portable.exe?
Community
Member reviews and reports for this exact file hash.