Is TerrariaServer.exe safe?
Single low-trust engine flag on a 12-year-old unsigned Terraria server binary with no tier-1 support.
74 engines scanned the file; only Bkav flagged it with a generic label. The sample is unsigned, shows no sandbox malice, and has been submitted by 110 sources since 2012.
12f33fcc95b4f7234c…c18f9b9c41d9ecRecommended 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.
74 engines scanned the file; only Bkav flagged it with a generic label. The sample is unsigned, shows no sandbox malice, and has been submitted by 110 sources since 2012.
The single detection originates from a low-trust engine and no tier-1 engine agrees. The file is unsigned, yet its prevalence classification of common_old and first-seen date in 2012 indicate long-standing legitimate distribution. Sandbox execution produced no malicious verdict and dropped children are clean. The triggered heuristic notes that direct-IP traffic can occur in legitimate software, and contacted-host reputation data is unavailable.
What We Detected
One low-trust engine (Bkav) returned the generic label W32.AIDetectMalware.CS; the remaining 73 engines reported clean. No tier-1 engine raised an alert.
Threat Behavior
The executable is unsigned. Sandbox analysis recorded typical Windows Error Reporting activity and three Microsoft IP addresses with no domain names. No malicious child processes or dropped files were observed.
What To Do Now
Keep Windows Defender and other endpoint protection enabled. The file can be executed if obtained from the official Terraria server distribution channel; otherwise obtain a fresh copy from the vendor site.
Where this verdict could be wrong1 caveat
- contactedHosts=null means no complete host-reputation cross-check available for the three observed IPs
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- common_old prevalence with 110 unique sources since 2012
- no tier-1 detections
- sandbox verdict clean
The sample presents low risk; retain existing antivirus protection and download future Terraria server binaries only from the official site.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete1 of 74 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial3 runtime contacts were observed without a completed reputation cross-check.
YARA
Complete1 signature or behavior rule 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
- 10MITRE ATT&CK techniques
- 3spawned processes
- 3network contacts
- 27filesystem & 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
TerrariaServer.exe
12f33fcc95b4f7234c8e6d41563139671c529172b0809c91d9c18f9b9c41d9ec
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
%SAMPLEPATH%\12f33fcc95b4f7234c8e6d41563139671c529172b0809c91d9c18f9b9c41d9ec.exe
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\SysWOW64\WerFault.exe
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
WER43F9.tmp
C:\ProgramData\Microsoft\Windows\WER\Temp\WER43F9.tmp
04Isolated runtime analysis - Written fileObserved
WER43F9.tmp.dmp
C:\ProgramData\Microsoft\Windows\WER\Temp\WER43F9.tmp.dmp
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
13.107.4.52
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
20.99.184.37
Contact observed during runtime.
07Isolated runtime analysis - +1 more recorded observation in Analyst mode
7 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.
- 13.107.4.52
- 20.99.184.37
- 131.253.33.203
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER43F9.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER43F9.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER4775.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER4775.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER489F.tmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERE270.tmp.dmp
- C:\ProgramData\Microsoft\Windows\WER\Temp\WERE34C.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER6C1.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER6C2.tmp.WERInternalMetadata.xml
- C:\ProgramData\Microsoft\Windows\WER\Temp\WER6E2.tmp.csv
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess6688
- \Sessions\1\BaseNamedObjects\Global\AmiProviderMutex_InventoryApplicationFile
- \Sessions\1\BaseNamedObjects\Global\425e9dd4-8229-4737-bb29-431b4dd32b99
Files this sample writes at runtime
This file drops 3 children at runtime. None are currently flagged malicious in our cache.
- 41661342b509c6ef2208…268ab2Never scannednever seen before
- 9d3e5c19776ca245baf7…c418dfNever scannednever seen before
- 547fc3d658eb3143774a…68e29bNever 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.
- 1rule hit recorded
- 1 / 74engines flagged
- 110sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
The hash has a long, established submission history across 110 sources.
Verdict inputView chapterProvenanceDerivedSourceSubmission historyObserved at - 02
1 of 74 antivirus engines flagged the file, including Bkav.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 03
The hash has been submitted 138 times from 110 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 04
Scanned file: TerrariaServer.exe — 12f33fcc95b4f7234c8e6d41563139671c529172b0809c91d9c18f9b9c41d9ec
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — %SAMPLEPATH%\12f33fcc95b4f7234c8e6d41563139671c529172b0809c91d9c18f9b9c41d9ec.exe
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\SysWOW64\WerFault.exe
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: WER43F9.tmp — C:\ProgramData\Microsoft\Windows\WER\Temp\WER43F9.tmp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: WER43F9.tmp.dmp — C:\ProgramData\Microsoft\Windows\WER\Temp\WER43F9.tmp.dmp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 13.107.4.52 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 20.99.184.37 — 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
Behavioral heuristics matched patterns associated with malware. Corroborating evidence determines how much weight they carry.
The 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.
Evidence13.107.4.52 · 20.99.184.37 · 131.253.33.203
1 of 74 engines flagged this file
View all 74 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
- TerrariaServer.exe
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 1.7 MB
- Last analyzed
- Sep 6, 2026, 6:50 AM UTC
12f33fcc95b4f7234c8e6d41563139671c529172b0809c91d9c18f9b9c41d9ecSafety & 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 TerrariaServer.exe safe?
What is TerrariaServer.exe?
How many antivirus engines detected TerrariaServer.exe?
What is the SHA-256 hash of TerrariaServer.exe?
Is it safe to run TerrariaServer.exe?
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Community
Member reviews and reports for this exact file hash.