Is sentry.dll safe?
No antivirus engine detected malware in this established DLL, while the lone T1055 runtime mapping lacks malicious sandbox, persistence, network, or family corroboration.
All 76 antivirus engines returned no detection, including 17 tier-1 engines, and the DLL has circulated for more than two years. One sandbox mapped activity to T1055 process injection, but it produced no malicious sandbox verdict, persistence indicator, network contact, confirmed malicious child, or named malware family.
4af35032e88cdded99…28e8a823e6167dRecommended 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 76 antivirus engines returned no detection, including 17 tier-1 engines, and the DLL has circulated for more than two years. One sandbox mapped activity to T1055 process injection, but it produced no malicious sandbox verdict, persistence indicator, network contact, confirmed malicious child, or named malware family.
The strongest evidence is the absence of detections across 76 antivirus engines, including 17 reporting tier-1 engines. The DLL is also well established, with 130 sources and 145 submissions over roughly 945 days, which weighs against an emerging threat. A completed sandbox run mapped one action to T1055, but did not issue a malicious verdict or observe persistence or network communication. Ten written child artifacts were inspected without a confirmed malicious result, although their individual verdicts remain unknown. The file is unsigned and no complete contacted-host reputation result is available, so ordinary source verification remains appropriate.
What We Detected
None of 76 antivirus engines flagged the DLL, and all 17 reporting tier-1 engines were non-detecting. The file has been observed for about 945 days across 130 sources and 145 submissions. External intelligence contains a CIRCL reference entry, but it is not marked known-malicious; no YARAify rules or malware-family identification were returned.
Threat Behavior
One completed sandbox run mapped activity to MITRE T1055, which can represent process injection. That mapping is a meaningful caution, but it was not accompanied by a malicious sandbox verdict, persistence indicators, registry modifications, or recorded network contacts. Ten child artifacts were inspected and none was confirmed malicious, though all retain unknown individual verdicts. No complete contacted-host reputation check is available.
What To Do Now
Use the DLL only if it came with software obtained from an expected, reputable source. Because it is unsigned, verify the enclosing application's origin and hash before deployment, and keep endpoint protection enabled while testing it in a controlled environment if provenance is uncertain.
Where this verdict could be wrong4 caveats
- MITRE T1055 is an offensive process-injection mapping and triggered MalwareTips.Synth.ProcessInjection, but the saved evidence does not establish the injection method or malicious intent.
- signing.signed=false for a Win32 DLL, so no authenticated publisher identity supports the file.
- contactedHosts=null means no complete host-reputation cross-check is available, although the sandbox recorded no contacted domains, IPs, or URLs.
- All 10 inspected dropped children have unknown verdicts, so droppedChildren.hasMaliciousChild=false is not equivalent to confirmed benign child 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.
- 0/76 antivirus detections
- 17 tier-1 engines reported no detection
- Established prevalence across 130 sources and 145 submissions
- No malicious sandbox verdict or persistence indicators
- No confirmed malicious dropped child
- MITRE T1055 process-injection mapping from one sandbox run
- Unsigned Win32 DLL with no authenticated publisher
- No complete contacted-host reputation cross-check
- Ten written child artifacts retain unknown individual verdicts
Use it when its source and parent application are expected; otherwise verify the SHA-256 with the software vendor or reinstall from the official distribution channel. Keep endpoint protection enabled.
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
Complete1 isolated runtime environment contributed observations.
Network
Not runNo contacted-host reputation check is recorded.
No timestamp recordedYARA
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
- 0network contacts
- 14filesystem & 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
sentry.dll
4af35032e88cdded994202817d3102b7f2eda381e5e544191a28e8a823e6167d
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\readme.dll",#1
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\System32\loaddll64.exe loaddll64.exe "C:\Users\user\Desktop\readme.dll"
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
WERB6D4.tmp
C:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp
04Isolated runtime analysis - Written fileObserved
WERB6D4.tmp.dmp
C:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp.dmp
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
5 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:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB772.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB772.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB7FF.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB772.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERB7FF.tmp
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess6184
- \Sessions\1\BaseNamedObjects\Global\10c2c21e-a7ce-4075-9998-02c226e7360e
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- cc92c897c7b764a442bc…abac5aNever scannednever seen before
- 46c3d3b1e2f14402227f…50d9dcNever scannednever seen before
- 1c0194d6c5b1996bfbb6…0f3814Never scannednever seen before
- 869a98b7ca0bfa1d2bc8…61c215Never scannednever seen before
- bda71047024476b6c95f…237471Never scannednever seen before
- da01e489dabf50f76bea…c0df91Never scannednever seen before
- 1dbaf55491901b24dada…bd5213Never scannednever seen before
- 5b79a39d58afd3c0b051…2dbb8fNever scannednever seen before
- 99a699ce616989197e39…a2c296Never scannednever seen before
- 40bf65069084792e5fb2…a7ee35Never 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
- 0 / 76engines flagged
- 130sources 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
The hash appears in a known-software reference database.
Verdict inputView chapterProvenanceObservedSourceReference software databaseObserved at - 03
The hash has a long, established submission history across 130 sources.
Verdict inputView chapterProvenanceDerivedSourceSubmission historyObserved at - 04
Scanned file: sentry.dll — 4af35032e88cdded994202817d3102b7f2eda381e5e544191a28e8a823e6167d
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\Desktop\readme.dll",#1
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\System32\loaddll64.exe loaddll64.exe "C:\Users\user\Desktop\readme.dll"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: WERB6D4.tmp — C:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: WERB6D4.tmp.dmp — C:\ProgramData\Microsoft\Windows\WER\Temp\WERB6D4.tmp.dmp
ProvenanceObservedSourceIsolated runtime analysisObserved at
Detection sources at a glance
The available sources did not agree on a named threat category.
One or more independent reference databases matched 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\readme.dll",#1
0 of 76 engines flagged this file
View all 76 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
- sentry.dll
- Format
- Win32 DLL
- Code signing
- No verified publisher
- Size
- 548.0 KB
- Last analyzed
- Sep 13, 2026, 4:02 PM UTC
4af35032e88cdded994202817d3102b7f2eda381e5e544191a28e8a823e6167dSafety & 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 sentry.dll safe?
What is sentry.dll?
How many antivirus engines detected sentry.dll?
What is the SHA-256 hash of sentry.dll?
Is it safe to use sentry.dll?
How up to date is this analysis of sentry.dll?
Community
Member reviews and reports for this exact file hash.