Is start-server.bat safe?
A 13-year-old batch file with zero detections and a trusted reference-library entry.
All 75 engines report clean, the file has been submitted thousands of times since 2011, and the National Software Reference Library lists it as Terraria-related. No malicious indicators appear in sandbox or network data.
131e7ea3f8e4ae359f…705333ac6a41f3Recommended next actions
Before running
Run it only when it came from the developer's official site or another source you independently trust.
If you already ran 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 75 engines report clean, the file has been submitted thousands of times since 2011, and the National Software Reference Library lists it as Terraria-related. No malicious indicators appear in sandbox or network data.
The complete absence of malicious detections across 75 engines, including 17 tier-1 engines, combined with the NSRL reference hit, establishes this as a known benign file. Its age and high submission count further confirm widespread legitimate use. Sandbox behaviour shows only ambient techniques with no malicious verdict or network contacts. No signing, brand mismatch, or heuristic triggers exist to complicate the assessment.
What We Detected
Zero malicious detections from 75 engines; 17 tier-1 engines explicitly marked the file clean. External intelligence shows a match in the National Software Reference Library (NSRL) under the product name "Terraria".
Threat Behavior
The batch file exhibits only ambient system-interaction techniques (T1064, T1071, T1082, T1202) with no offensive MITRE techniques, no sandbox malicious verdict, and no contacted domains or dropped children.
What To Do Now
The file can be considered safe for normal use. Keep endpoint protection enabled as a general precaution.
- 17 tier-1 engines reported clean
- NSRL reference-library hit
- common_old prevalence with 2694 submissions
No action required; the file is a known benign batch script associated with the Terraria game.
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
CompleteRule evaluation completed with no recorded matches.
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
- 4MITRE ATT&CK techniques
- 3spawned processes
- 0network contacts
- 0filesystem & 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
start-server.bat
131e7ea3f8e4ae359fef01a689ec0c6e113752712cb86624f5705333ac6a41f3
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Windows\system32\cmd.exe" /c start /wait "" "C:\Users\<USER>\Desktop\_R9W547U.bat"
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\system32\cmd.exe /K "C:\Users\<USER>\Desktop\_R9W547U.bat"
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
3 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.
Detection & Forensics
Consensus, attribution, signatures, code structure, prevalence, and identity.
Evidence integrity
Chain of custody for the facts preserved in this report.
- 0rule hits recorded
- 0 / 75engines flagged
- 2,181sources 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 appears in a known-software reference database.
Verdict inputView chapterProvenanceObservedSourceReference software databaseObserved at - 03
The hash has a long, established submission history across 2,181 sources.
Verdict inputView chapterProvenanceDerivedSourceSubmission historyObserved at - 04
Scanned file: start-server.bat — 131e7ea3f8e4ae359fef01a689ec0c6e113752712cb86624f5705333ac6a41f3
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Windows\system32\cmd.exe" /c start /wait "" "C:\Users\<USER>\Desktop\_R9W547U.bat"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\system32\cmd.exe /K "C:\Users\<USER>\Desktop\_R9W547U.bat"
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.
YARA rules
No matchesThe rule pass completed without a saved public match.
0 of 75 engines flagged this file
View all 75 engine results
PE structure
Not applicablePE structure analysis applies to Windows executable formats, not this file type.
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
- start-server.bat
- Format
- DOS batch file
- Code signing
- Not applicable to this file type
- Size
- 123 B
- Last analyzed
- Sep 6, 2026, 6:48 AM UTC
131e7ea3f8e4ae359fef01a689ec0c6e113752712cb86624f5705333ac6a41f3Safety & 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
Run it only when it came 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 start-server.bat safe?
What is start-server.bat?
How many antivirus engines detected start-server.bat?
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Community
Member reviews and reports for this exact file hash.