Is (unnamed file) safe?
No engine flagged this 555-day-old ZIP; 18 tier-1 engines reported clean.
Zero detections across 76 engines with 18 tier-1 clean reports. The file is a rare, old ZIP with no sandbox or host data available.
51d8f00bc19df42a36…5757099b9b99a1Recommended next actions
Before opening or extracting
Open or extract it only when its sender or download source has been independently verified.
If you already opened or extracted 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.
Zero detections across 76 engines with 18 tier-1 clean reports. The file is a rare, old ZIP with no sandbox or host data available.
All 76 reporting engines returned clean, including 18 tier-1 engines. No sandbox behaviour, dropped children, or external-intel hits exist. The single-submission history and lack of any malicious label leave no evidence of threat.
What We Detected
66 of 76 engines scanned the ZIP; none returned a malicious or suspicious result. 18 tier-1 engines explicitly marked it clean.
Threat Behavior
No sandbox execution data, no contacted hosts, and no dropped children were recorded. External intelligence sources returned no matches.
What To Do Now
The file shows no malicious indicators. Standard safe-handling practices still apply when opening unknown archives.
- engines.tier1ReportedClean=18
- engines.malicious=0
The archive can be considered safe to handle under normal precautions.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 76 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.
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.
Evidence integrity
Chain of custody for the facts preserved in this report.
- 0rule hits recorded
- 0 / 76engines flagged
- 1sources 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 76 antivirus engines flagged the file.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
No completed runtime observation is available for this file.
ProvenanceDerivedSourceRuntime coverageObserved at - 03
The hash has been submitted 1 time from 1 source.
ProvenanceDerivedSourceSaved report factsObserved 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 76 engines flagged this file
View all 76 engine results
PE structure
Not applicablePE structure analysis applies to Windows executable formats, not this file type.
How widely this file has been seen
Rarely uploaded, but has been around for a while. Often niche legitimate software or old internal tooling; not a strong malware signal on its own.
Fingerprint and provenance
- File name
- (unnamed file)
- Format
- ZIP
- Code signing
- Not applicable to this file type
- Size
- 21.6 MB
- Last analyzed
- Aug 31, 2026, 2:42 PM UTC
51d8f00bc19df42a36bcb14b551bc0dc646c913c9be4c046635757099b9b99a1Safety & 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
Open or extract it only when its sender or download source has been independently verified.
- 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 this file safe?
What is this file?
How many antivirus engines detected this file?
What is the SHA-256 hash of this file?
Is it safe to open or extract this file?
How up to date is this analysis of this file?
Community
Member reviews and reports for this exact file hash.