Is steam_api.dll safe?
Steam API DLL signed by Valve, zero engine detections, and widely distributed since 2011.
No antivirus engine flagged the file. It carries a valid Valve signature and has been submitted by hundreds of users over more than a decade.
11c7a5df676ffe1aa0…b5f642b12f7163Recommended 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.
No antivirus engine flagged the file. It carries a valid Valve signature and has been submitted by hundreds of users over more than a decade.
The file is a 12-year-old Steam API DLL signed by Valve. All 75 engines returned clean results, including 16 tier-1 engines. Prevalence data shows 269 unique sources and 385 submissions since 2011. Sandbox activity (T1055 and direct-IP contacts) is consistent with legitimate Steam runtime behavior and produced no malicious verdict. No external intelligence sources or child-file detections contradict the clean engine consensus.
What We Detected
75 engines scanned the sample; none returned a malicious or suspicious result. The DLL is signed by Valve with a verified certificate dated 2011. Sandbox execution recorded process-injection activity (T1055) and direct-IP traffic, but these are common in legitimate Steam components and did not trigger any malicious sandbox verdict.
Threat Behavior
No dropped malicious children, no complete contacted-host reputation result was available contacts, and no external-intel hits from CIRCL, MalwareBazaar, or YARAify. The file's age, prevalence, and clean signing history align with a legitimate Steam component rather than malware.
What To Do Now
The file can be considered safe. Keep Windows Defender and other endpoint protection enabled; no action is required.
Where this verdict could be wrong1 caveat
- Sandbox observed T1055 process injection and direct-IP contacts to 20.42.65.92 / 52.182.143.212, but no malicious sandbox verdict or known-bad host correlation.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- Valve code signature verified
- Zero engine detections across 75 scanners
- Widely distributed since 2011
Retain the file; it matches the expected Steam API component with no malicious indicators.
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
Partial2 runtime contacts were observed without a completed reputation cross-check.
YARA
Complete2 signature or behavior rules 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
- 11MITRE ATT&CK techniques
- 1spawned processes
- 2network contacts
- 22filesystem & 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
steam_api.dll
11c7a5df676ffe1aa0a498103d061e8c594a3d9df3b9cc23e5b5f642b12f7163
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Windows\System32\rundll32.exe" "C:\Users\<USER>\Desktop\attachment.dll",#1
02Isolated runtime analysis
Files
Created or changed
- Written fileObserved
AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0
03Isolated runtime analysis - Written fileObserved
Report.wer
C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0\Report.wer
04Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
20.42.65.92
Contact observed during runtime.
05Isolated runtime analysis - Contacted hostObserved
52.182.143.212
Contact observed during runtime.
06Isolated runtime analysis - +1 more recorded observation in Analyst mode
6 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.
- 20.42.65.92
- 52.182.143.212
- C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0
- C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0\Report.wer
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC753.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC753.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCA42.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER3993.tmp.csv
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER39B3.tmp.txt
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC753.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERC753.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERCA42.tmp
- \Sessions\1\BaseNamedObjects\DBWinMutex
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess4368
- \Sessions\1\BaseNamedObjects\Global\AmiProviderMutex_InventoryApplicationFile
- \Sessions\1\BaseNamedObjects\Global\0a320a65-1a66-46c5-982a-8691d2ed9d4b
Files this sample writes at runtime
This file drops 4 children at runtime. None are currently flagged malicious in our cache.
- a036100b166ab8db85a0…f8424aNever scannednever seen before
- fc572b569f5a0117c9c0…ca00cfNever scannednever seen before
- 09a5463427d1fed5d01a…cf3842Never scannednever seen before
- 583b46be574aa86dc4fe…e4e979Never 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.
- 2rule hits recorded
- 0 / 75engines flagged
- 269sources 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 269 sources.
Verdict inputView chapterProvenanceDerivedSourceSubmission historyObserved at - 03
The file has a valid code signature from Valve.
ProvenanceObservedSourceCode-signing metadataObserved at - 04
Scanned file: steam_api.dll — 11c7a5df676ffe1aa0a498103d061e8c594a3d9df3b9cc23e5b5f642b12f7163
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\System32\rundll32.exe" "C:\Users\<USER>\Desktop\attachment.dll",#1
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
File written: AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0 — C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: Report.wer — C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_rundll32.exe_36ce9e2f536be5a4331b1b3c284f5c74c7c99_82810a17_067a49f0\Report.wer
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
Contacted host: 20.42.65.92 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 52.182.143.212 — 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\System32\rundll32.exe" "C:\Users\<USER>\Desktop\attachment.dll",#1The sample contacted an external IP address directly and no application domain was recorded. Direct-IP traffic also occurs in legitimate installers and infrastructure, so this is supporting context only and requires corroboration from host reputation and other runtime evidence.
Evidence20.42.65.92 · 52.182.143.212
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
- steam_api.dll
- Format
- Win32 DLL
- Code signing
- Signature valid: Valve
- Size
- 121.8 KB
- Last analyzed
- Sep 6, 2026, 6:48 AM UTC
11c7a5df676ffe1aa0a498103d061e8c594a3d9df3b9cc23e5b5f642b12f7163Safety & 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 steam_api.dll safe?
What is steam_api.dll?
How many antivirus engines detected steam_api.dll?
Is steam_api.dll digitally signed?
What is the SHA-256 hash of steam_api.dll?
Is it safe to use steam_api.dll?
How up to date is this analysis of steam_api.dll?
Community
Member reviews and reports for this exact file hash.