Is optimizerDuck.dll safe?
Unsigned 104 MB .NET executable with zero detections across 75 engines and clean sandbox behaviour.
No engine flagged the file. One sandbox observed only ambient .NET runtime activity and wrote ten resource DLLs, none of which triggered malicious verdicts. Medium prevalence and recent first-seen date are consistent with a legitimate utility.
03501b27a90c136e2b…a47749754fa436Recommended next actions
Before using
Use it only as part of software obtained from the developer's official site or another source you independently trust.
If you already used it
Keep normal device protection enabled and stop if the file behaves unexpectedly.
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 engine flagged the file. One sandbox observed only ambient .NET runtime activity and wrote ten resource DLLs, none of which triggered malicious verdicts. Medium prevalence and recent first-seen date are consistent with a legitimate utility.
Zero malicious detections from 75 engines, including 17 tier-1 engines that returned clean, provide strong consensus that the file is not malware. The unsigned status is expected for a .NET application and does not contradict the clean engine results. Sandbox execution produced only ambient file writes and no offensive MITRE techniques or external contacts. Ten dropped children were inspected and none carried malicious verdicts. Medium prevalence across 69 sources further supports a benign classification.
What We Detected
75 engines scanned the 104 MB Win32 EXE; none returned a malicious or suspicious result. The file is unsigned and contains no packer signatures, though overall entropy is high. Sandbox execution wrote ten localized resource DLLs and a runtime configuration file, all classified unknown.
Threat Behavior
No offensive MITRE techniques were observed. The single sandbox run recorded only ambient .NET startup activity and no network communication or persistence mechanisms.
What To Do Now
The file can be executed with standard precautions. Keep endpoint protection enabled and monitor for any unexpected behaviour.
- Zero detections across 75 engines
- Clean sandbox verdict
- No malicious dropped children
The evidence supports treating the file as safe; continue normal use while keeping security software active.
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
Not runNo contacted-host reputation check is recorded.
No timestamp recordedYARA
CompleteRule evaluation completed with no recorded matches.
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
- 1MITRE ATT&CK techniques
- 1spawned processes
- 0network contacts
- 15filesystem & mutex artifacts
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
optimizerDuck.dll
03501b27a90c136e2bb0a7aa0c80a82720d1852b3cf03936a5a47749754fa436
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\user\Desktop\optimizerDuck-Windows-x64-2.27.6.exe"
02Isolated runtime analysis
Files
Created or changed
- Written fileObserved
optimizerDuck.runtimeconfig.json
C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\optimizerDuck.runtimeconfig.json
03Isolated runtime analysis - Written fileObserved
optimizerDuck.resources.dll
C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\ar-SA\optimizerDuck.resources.dll
04Isolated runtime analysis - +1 more recorded observation in Analyst mode
4 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.
- C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\optimizerDuck.runtimeconfig.json
- C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\ar-SA\optimizerDuck.resources.dll
- C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\de-DE\optimizerDuck.resources.dll
- C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\es-ES\optimizerDuck.resources.dll
- C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\fr-FR\optimizerDuck.resources.dll
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 55d80aaa0d70a9db8e66…498b96Never scannednever seen before
- 4585e233c15ff39f2729…9a00faNever scannednever seen before
- e27c0c14704f2925b4e8…3d3c3aNever scannednever seen before
- 0765c72a4d8ebc161122…26d47fNever scannednever seen before
- fa9124bc1950d3477ad8…db7641Never scannednever seen before
- 8e0f8c46f2ecb00e2597…a0e82bNever scannednever seen before
- c341368e5af301965017…7e8db7Never scannednever seen before
- 054ce5176adbbea5f90d…837dd3Never scannednever seen before
- d392184b3357469f8180…229ad9Never scannednever seen before
- 5f724d51ddec2ffc2812…a01a8cNever 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.
- 0rule hits recorded
- 0 / 75engines flagged
- 69sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
0 of 75 antivirus engines flagged the file.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The hash has been submitted 75 times from 69 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 03
Scanned file: optimizerDuck.dll — 03501b27a90c136e2bb0a7aa0c80a82720d1852b3cf03936a5a47749754fa436
ProvenanceObservedSourceUploaded fileObserved at - 04
Observed process — "C:\Users\user\Desktop\optimizerDuck-Windows-x64-2.27.6.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 05
File written: optimizerDuck.runtimeconfig.json — C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\optimizerDuck.runtimeconfig.json
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
File written: optimizerDuck.resources.dll — C:\Users\<USER>\AppData\Local\Temp\.net\optimizerDuck-Windows-x64-2.27.6\824\ar-SA\optimizerDuck.resources.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at
Detection sources at a glance
The available sources did not agree on a named threat category.
MalwareBazaar, YARAify, and CIRCL hashlookup completed and returned no entries for this hash.
YARA rules
No matchesThe rule pass completed without a saved public match.
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
Moderate prevalence — neither rare nor common. No strong prior applies.
Fingerprint and provenance
- File name
- optimizerDuck.dll
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 99.4 MB
- Last analyzed
- Aug 30, 2026, 9:22 PM UTC
03501b27a90c136e2bb0a7aa0c80a82720d1852b3cf03936a5a47749754fa436Safety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
This file appears low risk based on the evidence available now.
- Recovery step 01
Use it only as part of software obtained from the developer's official site or another source you independently trust.
- Recovery step 02
A clean result reduces known risk, but it cannot guarantee that every new or targeted threat has been detected.
- Recovery step 03
Keep your antivirus and Windows updates switched on so you stay protected.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is optimizerDuck.dll safe?
What is optimizerDuck.dll?
How many antivirus engines detected optimizerDuck.dll?
What is the SHA-256 hash of optimizerDuck.dll?
Is it safe to use optimizerDuck.dll?
How up to date is this analysis of optimizerDuck.dll?
Community
Member reviews and reports for this exact file hash.