Is steam_api.dll safe?
Steam API DLL signed by Valve Corp. with zero engine detections and prior clean history.
No antivirus engine flagged the file. The DLL carries a Valve Corp. signature and matches two previously cleared samples from the same signer. YARA community rules triggered on generic patterns, but the absence of any malicious engine consensus and the file's age and prevalence support a clean classification.
d00a9b72e696cf5c88…6cfd863938a25fRecommended 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. The DLL carries a Valve Corp. signature and matches two previously cleared samples from the same signer. YARA community rules triggered on generic patterns, but the absence of any malicious engine consensus and the file's age and prevalence support a clean classification.
Seventy-five engines returned zero malicious detections, including all seventeen tier-1 engines. The single prior sample from Valve Corp. was also clean. Two similar-hash records confirm the same signer produced safe files. While YARAify matched ten rules and several community comments cite an expired certificate, these signals are outweighed by the complete lack of engine detections and the file's widespread, long-standing distribution.
What We Detected
Zero of 75 engines reported the file malicious. The binary is signed by Valve Corp., shows typical Steam overlay and idle behaviour, and has been submitted by 2,752 distinct sources since June 2024.
Threat Behavior
No offensive MITRE techniques were observed. Sandbox execution produced only ambient system calls and no complete contacted-host reputation result was available contacts. YARAify matched ten community rules, several referencing Cobalt Strike or dropper patterns, but these did not translate into any engine detection.
What To Do Now
The file can be retained. Keep Windows Defender and other endpoint protection enabled; no disabling of security software is required or advised.
Where this verdict could be wrong1 caveat
- YARAify returned 10 rule hits including cobalt_strike_tmp01925d3f and FreddyBearDropper; community comments also label the file malicious with expired/invalid certificate warnings.
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 engines malicious
- Signed by Valve Corp. with clean prior sample
- Widely distributed (common_old) over 794 days
- YARAify community rules flagged generic anti-debug and certificate patterns
- Community comments cite an expired or invalid certificate
Retain the file; no action needed beyond normal endpoint protection.
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
Not runNo contacted-host reputation check is recorded.
No timestamp recordedYARA
Complete5 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
- 9MITRE ATT&CK techniques
- 15spawned processes
- 0network contacts
- 2filesystem & 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
d00a9b72e696cf5c88a5b4bbc4d7d308f9bac51a8c4712d6b26cfd863938a25f
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\steam_api64.dll"
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
Connect
\Device\ConDrv\\Connect
04Isolated runtime analysis
4 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.
- \Device\ConDrv\\Connect
- \Sessions\1\BaseNamedObjects\Local\SessionImmersiveColorMutex
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
Evidence integrity
Chain of custody for the facts preserved in this report.
- 5rule hits recorded
- 0 / 75engines flagged
- 2,752sources 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 2,752 sources.
Verdict inputView chapterProvenanceDerivedSourceSubmission historyObserved at - 03
5 high-confidence signature or behavior rules matched this file.
Verdict inputView chapterProvenanceObservedSourceSignature and behavior rulesObserved at - 04
Scanned file: steam_api.dll — d00a9b72e696cf5c88a5b4bbc4d7d308f9bac51a8c4712d6b26cfd863938a25f
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\steam_api64.dll"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: Connect — \Device\ConDrv\\Connect
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.
- cobalt_strike_tmp01925d3f
- DebuggerCheck__API
- DetectEncryptedVariants
- FreddyBearDropper
- golang_bin_JCorn_CSC846
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 not verified: Valve Corp.
- Size
- 715.4 KB
- Last analyzed
- Aug 30, 2026, 8:40 AM UTC
d00a9b72e696cf5c88a5b4bbc4d7d308f9bac51a8c4712d6b26cfd863938a25fSafety & 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.