Is baselib.dll safe?
No antivirus engine detected this verified Unity DLL, and its broad historical prevalence outweighs an uncorroborated sandbox mapping for possible process injection.
All 75 antivirus engines returned without a detection, including 17 tier-1 engines, and the DLL carries a verified Unity Technologies SF signature. It is also broadly distributed and established over time; the isolated T1055 and T1562.001 mappings warrant context but lack corroborating malware evidence.
dc51269e0c33371370…bedc7006bafa44Recommended 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.
All 75 antivirus engines returned without a detection, including 17 tier-1 engines, and the DLL carries a verified Unity Technologies SF signature. It is also broadly distributed and established over time; the isolated T1055 and T1562.001 mappings warrant context but lack corroborating malware evidence.
The sample produced no detections across 75 antivirus engines, with all 17 tier-1 participants reporting no detection. Its signature verifies to Unity Technologies SF, and no publisher mismatch was identified. The file has been submitted 2,457 times by 2,052 sources over 369 days, which strongly supports established commodity-software provenance. One completed sandbox run mapped activity to T1055 and T1562.001, but it recorded no malicious sandbox conclusion, persistence, or dropped payloads. Reputation checks covered all seven observed domains and found none in the malicious or suspicious cache, while external research feeds returned no matching intelligence.
What We Detected
No detection was returned by any of the 75 antivirus engines, including 17 tier-1 engines. The DLL has a verified signature from Unity Technologies SF, no detected brand mismatch, and no packing or high-entropy code indicators.
Threat Behavior
One sandbox run mapped activity to process injection (T1055) and impairment of defenses (T1562.001). These mappings are noteworthy, but they were not accompanied by a malicious sandbox conclusion, persistence indicators, dropped files, or known-malicious network destinations. All seven observed domains were covered by the host-reputation check, with no malicious or suspicious cache matches.
What To Do Now
Use the DLL only as part of the expected Unity application and retain endpoint protection. If it appeared outside a legitimate application directory or arrived unexpectedly, verify the parent application's source and rescan after updating security definitions.
Where this verdict could be wrong3 caveats
- behaviour.offensiveTechniques includes T1055 and T1562.001, and MalwareTips.Synth.ProcessInjection fired at high severity; the mapping indicates possible injection or defense impairment but does not establish malicious intent.
- signing.signerStats contains only 1 historical sample, so the publisher-history evidence is limited despite its 100% safe rate.
- file.reputation=-1 is a minor negative signal, although it conflicts with the broad prevalence and detection evidence.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 0/75 antivirus detections.
- 17 tier-1 engines reported no detection.
- Verified signature from Unity Technologies SF.
- 2,052 sources and 2,457 submissions over 369 days.
- No malicious or suspicious matches among all seven observed domains.
- Sandbox mapping included MITRE T1055 process injection.
- Sandbox mapping included MITRE T1562.001 impairment of defenses.
- Signer history is limited to 1 prior sample.
- File reputation is -1.
Allow it when it belongs to an expected Unity application from a trusted source, while keeping endpoint protection enabled. Investigate the parent application if the DLL appeared unexpectedly or outside its normal installation path.
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
Complete7 contacted hosts were cross-checked.
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
- 13MITRE ATT&CK techniques
- 15spawned processes
- 7network contacts
- 31filesystem & mutex artifacts
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.
- x1.c.lencr.org
- crl.root-x1.letsencrypt.org.edgekey.net
- e8652.dscx.akamaiedge.net
- svc.ha-teams.office.com
- windows.msn.com-ion.edgesuite.net
- a1672.dscr.akamai.net
- dns.google
- \REGISTRY\A\{addc4efb-6735-f851-a93f-cd07203ccdc0}\Root\InventoryApplicationFile\WritePermissionsCheck
- \REGISTRY\A\{addc4efb-6735-f851-a93f-cd07203ccdc0}\Root\InventoryApplicationFile\rundll32.exe|c8d854bf61fafc41\ProgramId
- \REGISTRY\A\{addc4efb-6735-f851-a93f-cd07203ccdc0}\Root\InventoryApplicationFile\rundll32.exe|c8d854bf61fafc41\FileId
- \REGISTRY\A\{addc4efb-6735-f851-a93f-cd07203ccdc0}\Root\InventoryApplicationFile\rundll32.exe|c8d854bf61fafc41\LowerCaseLongPath
- \REGISTRY\A\{addc4efb-6735-f851-a93f-cd07203ccdc0}\Root\InventoryApplicationFile\rundll32.exe|c8d854bf61fafc41\LongPathHash
- \REGISTRY\A\{addc4efb-6735-f851-a93f-cd07203ccdc0}\Root\InventoryApplicationFile\rundll32.exe|c8d854bf61fafc41\Name
- C:\ProgramData\Microsoft\Windows\WER\Temp
- C:\ProgramData\Microsoft\Windows\WER\Temp\6ae3a6b4-6407-4e73-8b8b-a0aadda5c072
- C:\ProgramData\Microsoft\Windows\WER\ReportQueue
- C:\ProgramData\Microsoft\Windows\WER\Temp\243963ae-e1a5-4b34-9332-e85a680e5492
- C:\ProgramData\Microsoft\Windows\WER\ReportArchive
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC6CA.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERD12B.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERD34F.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC6CA.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERD12B.tmp.WERInternalMetadata.xml
- Local\WERReportingForProcess6420
- Global\AmiProviderMutex_InventoryApplicationFile
- Global\4bfdf679-de5f-4b05-ab53-6d595b6efe88
- \Sessions\1\BaseNamedObjects\Local\SessionImmersiveColorMutex
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess444
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
- 0 / 75engines flagged
- 2,052sources 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 a long, established submission history across 2,052 sources.
Verdict inputView chapterProvenanceDerivedSourceSubmission historyObserved at - 03
The file has a valid code signature from Unity Technologies SF.
ProvenanceObservedSourceCode-signing metadataObserved at - 04
Scanned file: baselib.dll — dc51269e0c3337137029008a93623ba68935a4792e86df61d9bedc7006bafa44
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\baselib.dll",#1
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\system32\WerFault.exe -u -p 6420 -s 504
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: Temp — C:\ProgramData\Microsoft\Windows\WER\Temp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: 6ae3a6b4-6407-4e73-8b8b-a0aadda5c072 — C:\ProgramData\Microsoft\Windows\WER\Temp\6ae3a6b4-6407-4e73-8b8b-a0aadda5c072
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: x1.c.lencr.org — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: crl.root-x1.letsencrypt.org.edgekey.net — Contact observed during runtime.
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.
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:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\baselib.dll",#1
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
- baselib.dll
- Format
- Win32 DLL
- Code signing
- Signature valid: Unity Technologies SF
- Size
- 395.2 KB
- Last analyzed
- Oct 7, 2026, 7:47 AM UTC
dc51269e0c3337137029008a93623ba68935a4792e86df61d9bedc7006bafa44Safety & 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 baselib.dll safe?
What is baselib.dll?
How many antivirus engines detected baselib.dll?
Is baselib.dll digitally signed?
What is the SHA-256 hash of baselib.dll?
Is it safe to use baselib.dll?
How up to date is this analysis of baselib.dll?
Community
Member reviews and reports for this exact file hash.