Our call: Is OperaSetup (4).exe safe?Unknown
Unsigned installer submitted today with zero engine detections but no prior reputation.
- No completed runtime observation is available for this file.Derived · Runtime coverage
- 0 of 75 antivirus engines flagged the file.Observed · Antivirus analysis
- The hash has been submitted 1 time from 1 source.Derived · Saved report facts
a2a54e7e743f742872…88aa81673aRecommended next actions
Before running
Treat the file as unverified and avoid running it until more evidence is available.
If you already ran it
Run a full device scan. If its origin cannot be confirmed, delete this file and use a fresh copy from a trusted source.
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
PartialRuntime data is present, but no completed sandbox environment is recorded.
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.
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
No completed runtime observation is available for this file.
Verdict inputView chapterProvenanceDerivedSourceRuntime coverageObserved at - 02
0 of 75 antivirus engines flagged the file.
ProvenanceObservedSourceAntivirus analysisObserved at - 03
The hash has been submitted 1 time from 1 source.
ProvenanceDerivedSourceSaved report factsObserved at
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.
The file is a brand-new unsigned Opera installer. No engines flagged it, yet the complete lack of history and unsigned status leave its safety undetermined.
Seventy-five engines returned zero detections, including all seventeen tier-1 engines. The file is unsigned and first appeared today, so no historical signer data exists. Similar-hash matches are either imphash collisions or filetype-only, offering limited reassurance. Because coverage is low and the file is unsigned, the evidence is insufficient to declare it safe or malicious.
What We Detected
75 antivirus engines scanned the 3.2 MB executable; none returned a malicious or suspicious result. The PE is unsigned and shows normal section entropy with no packer signatures.
Threat Behavior
No sandbox execution data or network-contact reputation is available. The filename suggests an Opera browser installer, but the lack of signing prevents verification of authenticity.
What To Do Now
Download the installer directly from opera.com and verify its digital signature before execution. Keep endpoint protection enabled.
Where this verdict could be wrong3 caveats
- Unsigned installer with zero prior reputation could still be malicious despite clean engine results.
- similarHashes imphash matches are framework collisions, not strong signer evidence.
- contactedHosts=null means no complete host-reputation result is available.
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 engine detections across 75 scanners
- normal entropy, no packers
- unsigned executable
- rare_new prevalence
- zero prior reputation
Treat the file as unverified; obtain a signed copy from the vendor before running.
Behavior
Plain-English impact first, then the observed runtime evidence.
Runtime behavior was not available
The report does not treat a missing runtime observation as a clean result.
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
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
Barely seen in the wild and first surfaced recently. That limits reputation evidence, but rarity alone is not proof of malware.
Fingerprint and provenance
- File name
- OperaSetup (4).exe
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 3.1 MB
- Last analyzed
- Aug 1, 2026, 10:39 AM UTC
a2a54e7e743f7428722c0d0cca6e9370d31d052fd0b3ed4fdcf42388aa81673aSafety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
There isn't enough information to give this file a clear rating.
Be cautious — an unknown rating is not the same as a clean bill of health.
Run it only when it came from the developer's official site or another source you independently trust.
When in doubt, don't run it — or scan it again later once it's more widely seen.