File scan report
Verdict Safe
Is libsoundio.
Widely distributed audio library with 17 major antivirus engines clean, no malicious sandbox verdict, and consistent community NO_THREAT verdicts despite rule-based sandbox…
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Strong evidence · Widely seen for a long time, and nothing harmful found.
Good practice2 tips
We found nothing harmful in this file.
Use it only as part of a program you got from the developer's own website.
Keep your antivirus and Windows updates switched on.
No scanner can promise a file is 100% safe.
Reads the latest antivirus results for this file's hash. Nothing is uploaded.
Antivirus results
0 of 71 flagged
- Flagged 0
- No detection 71
- No result 4
- Code signing Unsigned
- Test run Completed
- First seen 7y ago
Chapter 02
Why we think so
0 points against it and 5 in its favour, checked against the scan evidence.
The reasoning behind this verdict
libsoundio.dll is a legitimate open-source audio library with 2,879 submitters and 3,850 submissions since 2019. All 17 major antivirus engines report clean or undetected. Community analysis (FileScan.IO) confirms NO_THREAT verdict.
The file exhibits a clean profile across all major antivirus engines (Avast, BitDefender, Kaspersky, ESET, Fortinet, Emsisoft, Ikarus, DrWeb, F-Secure, GData, Avira, AVG) with zero malicious detections from major antivirus engines. Its prevalence as a widely seen and long established file with nearly 3,000 unique submitters and 3,850 submissions over 7+ years indicates widespread, established distribution. Community analysis from FileScan.IO consistently reports NO_THREAT or INFORMATIONAL verdicts with 100% confidence. The YARA rule match (pe_detect_tls_callbacks) is a structural detection, not a malware family signature. The file is consistent with a legitimate library.
What We Detected
libsoundio.dll is a 64-bit Windows DLL submitted 3,850 times by 2,879 unique sources since February 2019. Zero malicious detections across 71 reporting engines.
Threat Behavior
Sandbox analysis observed the DLL being loaded via rundll32.exe and contacting 5 external IP addresses without DNS resolution. However, no malicious sandbox verdict was recorded, no malicious files it created were confirmed, and the contacted IPs are not in our malicious host cache. Community analysis (FileScan.IO) reports NO_THREAT or INFORMATIONAL verdicts. The file is consistent with libsoundio, a legitimate open-source audio library.
What To Do Now
No action required. The file is safe to use. The rule-based sandbox observations reflect test-environment execution patterns rather than confirmed malicious activity. If you encounter this file in your environment, it is likely a legitimate audio library component.
Where this verdict could be wrong3 caveats
- triggeredHeuristics fired on two of our behaviour rules — sandbox observed the DLL being injected into rundll32.exe and contacting 5 external IPs without DNS. However, these are rule-based observations in a test environment, not engine verdicts; the absence of major consensus and the clean community verdicts suggest the behaviours are consistent wit
- The file is unsigned and old (2,672 days), which could indicate abandoned or legacy software; however, libsoundio is a real open-source audio library (github.com/andrewrk/libsoundio), and the community comments cite github.com as a contacted domain, consistent with legitimate library distribution.
- Direct-IP a control server rule is typically a strong malware signal, but in this case the IPs (204.79.197.203, 20.189.173.22, 13.89.179.12, 20.42.65.92, 20.189.173.20) are not in our malicious host cache, and the sandbox verdict is not malicious — the behaviour may reflect legitimate library functionality or test-environment artifact.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 17 major antivirus engines report clean or undetected
- 2,879 unique submitters, 3,850 submissions since 2019 — widely distributed, long-established
- Community analysis (FileScan.IO) confirms NO_THREAT verdict with 100% confidence
- No malicious sandbox verdict. No complete contacted-host reputation result was available.
- Consistent with legitimate open-source audio library (libsoundio)
6 sources checked · 5 complete · 1 partial. See every source
Chapter 03
What it did in our test
It ran in our isolated test environment; no test environment rated what it did as risky.
Test run summary
Capture complete- 10sandbox rule tags
- 14spawned processes
- 4network contacts
- 40filesystem & mutex artifacts
What this file did when executed
This file was run in a sandbox and its runtime behaviour was observed.
Techniques observed in the sandbox
10MITRE ATT&CK techniques the sandbox mapped. Highlighted ones are rare in normal software; the others are common in legitimate programs too.
- T1018
- T1055· Process injection
- T1071· Application protocol
- T1082· System recon
- T1095· Custom network
- T1129· Loads modules
- T1218.011
- T1497· Sandbox evasion
- T1518.001· Checks your AV
- T1562.001· Disables security
Observed activity
Processes started
14Programs the file ran, with their command lines.
rundll32.exe"C:\Windows\sysnative\rundll32.exe" "C:\Users\<USER>\AppData\Local\Temp\readme.dll",#1loaddll64.exeC:\Windows\System32\loaddll64.exe loaddll64.exe "C:\Users\user\Desktop\readme.dll"cmd.exeC:\Windows\System32\cmd.exe cmd.exe /C rundll32.exe "C:\Users\user\Desktop\readme.dll",#1rundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",#1rundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\readme.dll,soundio_backend_countrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\readme.dll,soundio_backend_name
Show all 14 entries for processes started
rundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\readme.dll,soundio_best_matching_channel_layoutrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",soundio_backend_countrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",soundio_backend_namerundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",soundio_best_matching_channel_layoutrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",soundio_wakeuprundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",soundio_wait_eventsrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",soundio_version_stringrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",soundio_version_patch
Network contacts
44 hosts, listed as 4 addresses. Links show the host and path only.
- IP address
20.189.173.22 - IP address
13.89.179.12 - IP address
20.42.65.92 - IP address
20.189.173.20
Files
30Files the file created, changed or deleted.
- Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_1e8dc90b09ebae8ffc9ebfdf8ae9b75731582fb_b7758387_0d01f5e1 - Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_1e8dc90b09ebae8ffc9ebfdf8ae9b75731582fb_b7758387_0d01f5e1\Report.wer - Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_3b8f2b417e8b58448a49f9a384cbc42cc2bc411d_b7758387_1a49c1f0 - Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_3b8f2b417e8b58448a49f9a384cbc42cc2bc411d_b7758387_1a49c1f0\Report.wer - Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_6afcd3b460963e6ca0d93cd3f62d931b3260ba43_b7758387_1a59b425 - Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_6afcd3b460963e6ca0d93cd3f62d931b3260ba43_b7758387_1a59b425\Report.wer
Show all 30 entries for files
- Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_911a82f34a76e267a7b61624422b84c4af5267b_b7758387_1505cea2 - Written
C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_rea_911a82f34a76e267a7b61624422b84c4af5267b_b7758387_1505cea2\Report.wer - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WERA957.tmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WERA957.tmp.dmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WERABE9.tmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WERABE9.tmp.WERInternalMetadata.xml - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WERACE4.tmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WERACE4.tmp.xml - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WERB7FD.tmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER163E.tmp.csv - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER164E.tmp.txt - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER268C.tmp.csv - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER269C.tmp.txt - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER32E2.tmp.csv - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER32F3.tmp.txt - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5AAF.tmp.csv - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5AD0.tmp.txt - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERA957.tmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERA957.tmp.dmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERABE9.tmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERABE9.tmp.WERInternalMetadata.xml - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERACE4.tmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERACE4.tmp.xml - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERB7FD.tmp
Mutexes
10Named locks a program uses so only one copy runs; malware families often reuse them.
\Sessions\1\BaseNamedObjects\Local\WERReportingForProcess6692\Sessions\1\BaseNamedObjects\Global\a74f167d-7535-4531-b2f3-3d90357d8b5f\Sessions\1\BaseNamedObjects\Local\WERReportingForProcess2372\Sessions\1\BaseNamedObjects\Global\6e600947-0eff-4742-b612-03120bba08e8\Sessions\1\BaseNamedObjects\Local\WERReportingForProcess5520\Sessions\1\BaseNamedObjects\Global\739c2f1a-d4ef-4db0-a71c-965e81297a1c
Show all 10 entries for mutexes
\Sessions\1\BaseNamedObjects\Local\WERReportingForProcess1504\Sessions\1\BaseNamedObjects\Global\7692337a-6c2b-493f-aab1-e1f87919e1bd\Sessions\1\BaseNamedObjects\Local\WERReportingForProcess6380\Sessions\1\BaseNamedObjects\Global\912bdae5-8d7a-4c73-a251-4247feca1d5d
Sandbox background — not the file
2The analysis machine's own processes and connections, recorded in every run.
- VM process
conhost.exeC:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 - VM host
204.79.197.203
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache. 10 have no saved verdict and were not checked; that is missing coverage, not a finding.
- 70f1b92b8440a361bedc…03a9a8Not checkedno saved verdict
- 257b5af66f81b59ef27f…4f9935Not checkedno saved verdict
- 2ab05ff2e69d97d2de90…e24e24Not checkedno saved verdict
- cc6bb6ea82848c294c19…45bdcbNot checkedno saved verdict
- 0f71f1627589c850d73d…154320Not checkedno saved verdict
- b000fd50ed69a745f98f…de7a50Not checkedno saved verdict
- 716d68d2b2ef10a37bb7…f574abNot checkedno saved verdict
- 98d27273ca924c116ced…ef42aaNot checkedno saved verdict
- 98d954fce20e0d622c1e…1b03c2Not checkedno saved verdict
- 8f39fae9cf9e866f9a90…d6c34dNot checkedno saved verdict
Chapter 04
Technical details
None of the 71 antivirus engines that checked it flag it; no publisher signature.
Sources checked
Every check behind this verdict
6 sources checked · 5 complete · 1 partial. Complete means the check returned a usable result; it does not mean the file is safe.
File fingerprint
- Last analyzed
- Jun 10, 2026, 1:28 PM UTC
- SHA-256
b266f223cb08279b8dd09e08538fc9468255d904b609c28775dbaeffbe753ddb- SHA-1
95a6e6de7f452ed7cb7bc02730cde999f27cca53- MD5
b492d241dbae5fd322b1779226a3f0a9
About this file
libsoundio.dll is a Win32 DLL file of 85.5 kB.
- Type and size
- Win32 DLL · 85.5 kB
- Signer
- UnsignedNo code signature.
- First seen
- Feb 15, 2019On VirusTotal.
- Submitted by
- 2,879 distinct sources
- Packer
- None detected
- Entropy
- 5.56 of 8
First scanned
Antivirus consensus
0 of 71 engines flagged this file
4 of the 75 engines returned no result for this file (file type not supported, or the scan did not finish), so they did not check it.
- Tier-118 engines0flagged
- Tier-236 engines0flagged
- Low-trust17 engines0flagged
View all 75 engine results
- AcronisClean
- AhnLab-V3Clean
- AlibabaClean
- alibabacloudClean
- ALYacClean
- Antiy-AVLClean
- APEXClean
- ArcabitClean
- AvastClean
- Avast-MobileNo result
- AVGClean
- AviraClean
- BitDefenderClean
- BitDefenderFalxNo result
- BkavClean
- CAT-QuickHealClean
- ClamAVClean
- CMCClean
- CrowdStrikeClean
- CTXClean
- CylanceClean
- CynetClean
- DeepInstinctClean
- DrWebClean
- ElasticClean
- EmsisoftClean
- ESET-NOD32Clean
- F-SecureClean
- FortinetClean
- GDataClean
- GoogleClean
- GridinsoftClean
- huorongClean
- IkarusClean
- JiangminClean
- K7AntiVirusClean
- K7GWClean
- KasperskyClean
- KingsoftClean
- LionicClean
- MalwarebytesClean
- MaxSecureClean
- McAfeeDClean
- MicrosoftClean
- MicroWorld-eScanClean
- NANO-AntivirusClean
- PaloaltoClean
- PandaClean
- RisingClean
- SangforClean
- SentinelOneClean
- SkyhighClean
- SophosClean
- SUPERAntiSpywareClean
- SymantecClean
- SymantecMobileInsightNo result
- TACHYONClean
- tehtrisClean
- TencentClean
- TrapmineClean
- TrellixENSClean
- TrendMicroClean
- TrendMicro-HouseCallClean
- TrustlookNo result
- VaristClean
- VBA32Clean
- VIPREClean
- VirITClean
- ViRobotClean
- WebrootClean
- XcitiumClean
- YandexClean
- ZillyaClean
- ZoneAlarmClean
- ZonerClean
Signatures and behavior heuristics
Community YARA rules matched, but all of them are generic capability, anti-debug or compiler rules that ordinary software also matches. Worth noting, not on their own cause for alarm.
- pe_detect_tls_callbacksgeneric
VirusTotal's sandbox summary maps this run to MITRE T1055 (Process Injection), but no injected process of the sample's own was recorded (the analysis VM's own WMI adapter, crash handlers and Chrome updater are not counted). VirusTotal maps T1055 on about half of all files no engine flags, so the mapping alone is not evidence of injection.
EvidenceT1055 (sandbox MITRE mapping)
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.
Chapter 05
Questions & answers
Short answers to the 6 questions people ask most about this file.
Is libsoundio.dll safe?
What is libsoundio.dll?
How many antivirus engines detected libsoundio.dll?
What is the SHA-256 hash of libsoundio.dll?
Is it safe to use libsoundio.dll?
How up to date is this analysis of libsoundio.dll?
Community
Member reviews and reports for this exact file hash.