File scan report
Verdict Safe
Is glfw3.
glfw3.dll is a legitimate OpenGL windowing library with 4-year prevalence, major antivirus engine silence, and heuristic-only triggers.
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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 70 flagged
- Flagged 0
- No detection 70
- No result 5
- Code signing Unsigned
- Test run Completed
- First seen 4y ago
Chapter 02
Why we think so
2 points against it and 4 in its favour, checked against the scan evidence.
The reasoning behind this verdict
This file is glfw3.dll, the official GLFW3 open-source windowing library. All 16 major antivirus engines report it clean. The file's 4-year prevalence (2,546 submitters) confirms it as widely-distributed commodity software.
The evidence strongly supports a benign classification. The file's identity as glfw3.dll — a legitimate, open-source OpenGL library — is corroborated by its widely seen and long established prevalence classification (2,546 unique submitters, 3,216 submissions since July 2022). YARAify's 2 rule matches are rule-based pattern triggers; the Cobalt Strike rule name is misleading, and major antivirus engines' silence contradicts any true CobaltStrike payload. Community comments show mixed verdicts (FileScan.IO LIKELY_MALICIOUS vs INFORMATIONAL), reflecting rule-based uncertainty rather than consensus.
What We Detected
glfw3.dll is a 354 KB Win32 DLL submitted 3,216 times by 2,546 unique sources since July 2022. No malicious consensus exists.
Threat Behavior
Major antivirus engines' silence contradicts any true Cobalt Strike payload. Files it created (3 hashes) have no confirmed malicious verdicts. No malicious sandbox verdict was recorded.
File Identity
glfw3.dll is the official GLFW3 (Graphics Library Framework) open-source windowing and input library, widely used in graphics applications. Its 4-year prevalence across 2,546 submitters confirms it as legitimate commodity software.
What To Do Now
This file is safe. No action is required. If you encountered it in a security alert, the alert likely reflects rule-based over-triggering on a benign library. Verify the file's source (official GLFW3 repository or trusted software vendor) if you have concerns about its origin.
Where this verdict could be wrong2 caveats
- Community comments cite FileScan.IO LIKELY_MALICIOUS verdicts, but FileScan.IO is a heuristic-heavy sandbox tool; its verdicts conflict with major antivirus engine silence and the file's 4-year prevalence history.
- If the YARA rule 'cobalt_strike_tmp01925d3f' were a true Cobalt Strike detection, we would expect major antivirus engines (Kaspersky, BitDefender, Fortinet) to flag it — they do not, suggesting the rule is a false-positive pattern match.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- 16 major antivirus engines (Avast, BitDefender, Kaspersky, ESET-NOD32, Fortinet, etc.) all report clean
- widely seen and long established prevalence: 2,546 unique submitters, 3,216 submissions since July 2022
- File identity confirmed as legitimate GLFW3 open-source windowing library
- No malicious files it created. No complete contacted-host reputation result was available; no malicious sandbox verdict
- YARAify matched 2 community rules — rule-based pattern matches, not confirmed malware signatures
- Direct-IP contact detected — but IP resolves to Sectigo certificate infrastructure, not a control server
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- 14sandbox rule tags
- 14spawned processes
- 1network contact
- 20filesystem & 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
14MITRE ATT&CK techniques the sandbox mapped. Highlighted ones are rare in normal software; the others are common in legitimate programs too.
- T1018
- T1027· Obfuscated code
- T1055· Process injection
- T1056· Keylogging
- T1056.001· Keylogging
- T1063
- T1071· Application protocol
- T1082· System recon
- T1115
- T1129· Loads modules
- T1218.011
- T1497· Sandbox evasion
- T1518.001· Checks your AV
- T1564.003· Hides artifacts
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\attachment.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,glfwCreateCursorrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\readme.dll,glfwCreateStandardCursor
Show all 14 entries for processes started
rundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe C:\Users\user\Desktop\readme.dll,glfwCreateWindowrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",glfwCreateCursorrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",glfwCreateStandardCursorrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",glfwCreateWindowrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",glfwWindowShouldCloserundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",glfwWindowHintStringrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",glfwWindowHintrundll32.exeC:\Windows\System32\rundll32.exe rundll32.exe "C:\Users\user\Desktop\readme.dll",glfwWaitEventsTimeout
Network contacts
11 host, listed as 2 links. Links show the host and path only.
- URL
http://crt.sectigo.com/SectigoPublicCodeSigningCAR36.crt - URL
http://crt.sectigo.com/SectigoPublicCodeSigningRootR46.p7c
Files
18Files the file created, changed or deleted.
- Written
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_rea_10248191228da35c8a822e1cfc30372e64a5adfb_b7758387_1fbf672a - Written
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_rea_10248191228da35c8a822e1cfc30372e64a5adfb_b7758387_1fbf672a\Report.wer - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5651.tmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5651.tmp.dmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5817.tmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5817.tmp.WERInternalMetadata.xml
Show all 18 entries for files
- Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5941.tmp - Written
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5941.tmp.xml - Written
C:\Users\user\AppData\Local\DBG - Written
\Device\ConDrv\\Connect - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5651.tmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5651.tmp.dmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5817.tmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5817.tmp.WERInternalMetadata.xml - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5941.tmp - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WER5941.tmp.xml - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERAF64.tmp.csv - Deleted
C:\ProgramData\Microsoft\Windows\WER\Temp\WERAF74.tmp.txt
Mutexes
2Named locks a program uses so only one copy runs; malware families often reuse them.
\Sessions\1\BaseNamedObjects\Local\WERReportingForProcess7804\Sessions\1\BaseNamedObjects\Global\82646432-8982-491f-8358-0cb65b371d5d
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 3 children at runtime. None are currently flagged malicious in our cache. 3 have no saved verdict and were not checked; that is missing coverage, not a finding.
- b33efcb95235b98b4850…29307fNot checkedno saved verdict
- 3693bf8896e0a274503c…b1d60dNot checkedno saved verdict
- 33f064cb06a737ea3c0e…fccee1Not checkedno saved verdict
Chapter 04
Technical details
None of the 70 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, 1:38 PM UTC
- SHA-256
e15c2dca331d4c15b7f60fbad81f7774ec4cf23c94484d4dc1912c016eaa93ea- SHA-1
7eeca1b55f2dc9f73e73aa42ef3809955a5ebc74- MD5
529bf9fb63a41e5cc66cb1fc0b4303d7
About this file
glfw3.dll is a Win32 DLL file of 354.8 kB.
- Type and size
- Win32 DLL · 354.8 kB
- Signer
- UnsignedNo code signature.
- First seen
- Jul 22, 2022On VirusTotal.
- Submitted by
- 2,546 distinct sources
- Packer
- None detected
- Entropy
- 5.94 of 8
First scanned
Antivirus consensus
0 of 70 engines flagged this file
5 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-117 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
- IkarusNo result
- 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.
- cobalt_strike_tmp01925d3fgeneric
- DebuggerCheck__APIgeneric
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 glfw3.dll safe?
What is glfw3.dll?
How many antivirus engines detected glfw3.dll?
What is the SHA-256 hash of glfw3.dll?
Is it safe to use glfw3.dll?
How up to date is this analysis of glfw3.dll?
Community
Member reviews and reports for this exact file hash.