Is Lunar Client - Installer.exe safe?
Safe file assessment
0 of 73 antivirus engines flagged the file.
57fac95018b9455654…577ebcd51263b6Recommended next actions
Before installing
Install it only when it came from the developer's official site or an official app store.
If you already installed 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.
No saved analyst narrative
This report keeps the verified scan facts available below without inventing an analysis that was not saved with the scan.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete0 of 73 engines flagged the file.
Sandbox
Complete1 isolated runtime environment contributed observations.
Network
Partial3 of 16 contacted hosts were cross-checked; coverage is incomplete.
YARA
Complete3 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
- 42MITRE ATT&CK techniques
- 15spawned processes
- 19network contacts
- 40filesystem & 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
Lunar Client - Installer.exe
57fac95018b945565454396e7481619c07cd6b13acdbdd3342577ebcd51263b6
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\<USER>\Desktop\Lunar Client - Installer.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
"C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\OWinstaller.exe" Sel=0&Extension=jilehohlakeokncafogkgnicgndeecdiengddbcc&UtmSource=client-site&UtmMedium=download-page&UtmCampaign=direct&Referer=www.lunarclient.com&Browser=chrome -partnerCustomizationLevel 1 -customPromoPages --owelectronUrl=https://launcherupdates.lunarclientcdn.com/latest-ow.yml -AllowWindowsInsider --disable-change-location --disable-ow-shortcut-ui --disable-app-shortcut-ui --enable-app-shortcut --eula-url=https://www.lunarclient.com/terms --privacy-url=https://www.lunarclient.com/privacy --silent-setup --app-name="Lunar Client" --auto-close -exepath C:\Users\<USER>\Desktop\Lunar Client - Installer.exe
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
UserInfo.dll
C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\UserInfo.dll
04Isolated runtime analysis - Written fileObserved
System.dll
C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\System.dll
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
104.18.29.96
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
3.169.202.80
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.
- 104.18.29.96
- 3.169.202.80
- 18.154.101.114
- 18.154.101.94
- 192.178.212.95
- 3.169.202.6
- 99.84.118.22
- 18.238.176.32
- 173.194.194.94
- 8.8.8.8
- https://launcherupdates.lunarclientcdn.com/latest-ow.yml
- https://analyticsnew.overwolf.com/analytics/Counter?CurrentVersion=&PartnerID=0&Name=Manual_Funnel2_Installer_Launched_v2&Value=1&UserName=&GameSessionId=&Extra=%257b%2522OSBuild%2522%253a%252210.0.19044.1288%2522%252c%2522isElectron%2522%253a%2522true%2522%252c%2522appId%2522%253a%2522jilehohlakeokncafogkgnicgndeecdiengddbcc%2522%257d&owver=2.304.0.13&MUID=1f40ba10-aa53-4ce2-b379-f63ed62283d4&MUIDV2=e8fb4040-f448-467b-80bd-92e387709463
- https://analyticsnew.overwolf.com/analytics/Counter?CurrentVersion=&PartnerID=0&Name=Manual_Installer_Launched_v2&Value=1&UserName=&GameSessionId=&Extra=%257b%2522OSBuild%2522%253a%252210.0.19044.1288%2522%252c%2522isElectron%2522%253a%2522true%2522%252c%2522appId%2522%253a%2522jilehohlakeokncafogkgnicgndeecdiengddbcc%2522%252c%2522existingUUID%2522%253a%25221f40ba10-aa53-4ce2-b379-f63ed62283d4%2522%252c%2522appstoreUUID%2522%253anull%252c%2522uid%2522%253a%2522jilehohlakeokncafogkgnicgndeecdiengddbcc%2522%252c%2522clientInstalled%2522%253a%2522False%2522%257d&owver=2.304.0.13&MUID=1f40ba10-aa53-4ce2-b379-f63ed62283d4&MUIDV2=e8fb4040-f448-467b-80bd-92e387709463
- https://analyticsnew.overwolf.com/analytics/Counter?CurrentVersion=&PartnerID=0&Name=installer_webbrowser_init_v2&Value=1&UserName=&GameSessionId=&Extra=%257b%2522OSBuild%2522%253a%252210.0.19044.1288%2522%252c%2522isElectron%2522%253a%2522true%2522%252c%2522appId%2522%253a%2522jilehohlakeokncafogkgnicgndeecdiengddbcc%2522%252c%2522ver%2522%253a%2522122.0.2365.92%2522%257d&owver=2.304.0.13&MUID=1f40ba10-aa53-4ce2-b379-f63ed62283d4&MUIDV2=e8fb4040-f448-467b-80bd-92e387709463
- http://www.google-analytics.com/__utm.gif?utmwv=4.7.2&utmn=350443589&utmhn=&utmcs=UTF-8&utmsr=-&utmsc=-&utmul=-&utmje=0&utmfl=-&utmdt=&utmhid=137719788&utmr=/&utmp=/&utmac=UA-80584726-1&utmcc=__utma%3D0.1437153711.1783294892.1783294892.1783294892.2%3B%2B__utmz%3D0.1783294892.1.1.utmcsr%3D%28direct%29%7Cutmccn%3D%7Cutmcmd%3D%3B&utme=5%28Funnel2%2AInstaller%20Launched%2A%29%28%29&gaq=1&utmt=event
- http://www.google-analytics.com/__utm.gif?utmwv=4.7.2&utmn=869566930&utmhn=&utmcs=UTF-8&utmsr=-&utmsc=-&utmul=-&utmje=0&utmfl=-&utmdt=&utmhid=977747094&utmr=/&utmp=/&utmac=UA-18298709-8&utmcc=__utma%3D0.1437153711.1783294892.1783294892.1783294892.2%3B%2B__utmz%3D0.1783294892.1.1.utmcsr%3D%28direct%29%7Cutmccn%3D%7Cutmcmd%3D%3B&utme=5%28Funnel2%2AInstaller%20Launched%2A%29%28%29&gaq=1&utmt=event
- C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\UserInfo.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\System.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\uac.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\nsProcess.dll
- C:\Users\<USER>\AppData\Local\Overwolf\OWInstall.log
- C:\Users\<USER>\AppData\Local\Temp\ow-electron\InstallerTrace_2026-07-07_20-33_3616.log
- C:\Users\<USER>\AppData\Local\Overwolf\Settings\bak\SettingsPageBasic.xml.bak
- C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\OWinstaller.exe.WebView2\EBWebView\BrowserMetrics-spare.pma
- C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\OWinstaller.exe.WebView2\EBWebView\Default\Code Cache\wasm\index-dir\the-real-index
- C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\OWinstaller.exe.WebView2\EBWebView\Default\Code Cache\js\index-dir\temp-index
- C__Users_Bruno_AppData_Local_Temp_ow-electron_InstallerTrace_2026-07-07_20-33_3616.log_rolling
- OverwolfInstaller_Lunar Client
- Local\ChromeProcessSingletonStartup!
- __OMADM_NAMED_MUTEX__
- Local\DDrawWindowListMutex
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- fbcfe23a2ecb82b7100c…dc0f2dNever scannednever seen before
- 9c46f7929b08c87518aa…cdb3beNever scannednever seen before
- 4da28ba55f43cc1d03d5…6c512eNever scannednever seen before
- 5c2fba2311105df5c850…411b3dNever scannednever seen before
- b152284fd1ef5cebee56…b4cb1fNever scannednever seen before
- c69ad6c6a1d6d89336e1…be49ddNever scannednever seen before
- 078382c80c2c3b4f6452…3eb976Never scannednever seen before
- 5091f122e60714f35dbc…1a0c45Never scannednever seen before
- 83fff6ded423944d0d6d…61c383Never scannednever seen before
- af10225db6ff7d4b67d0…9dc9aeNever 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.
- 3rule hits recorded
- 0 / 73engines flagged
- 2sources 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 73 antivirus engines flagged the file.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The file has a valid code signature from Overwolf Ltd.
ProvenanceObservedSourceCode-signing metadataObserved at - 03
1 high-confidence signature or behavior rule matched this file.
Verdict inputView chapterProvenanceDerivedSourceSignature and behavior rulesObserved at - 04
Scanned file: Lunar Client - Installer.exe — 57fac95018b945565454396e7481619c07cd6b13acdbdd3342577ebcd51263b6
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Users\<USER>\Desktop\Lunar Client - Installer.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — "C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\OWinstaller.exe" Sel=0&Extension=jilehohlakeokncafogkgnicgndeecdiengddbcc&UtmSource=client-site&UtmMedium=download-page&UtmCampaign=direct&Referer=www.lunarclient.com&Browser=chrome -partnerCustomizationLevel 1 -customPromoPages --owelectronUrl=https://launcherupdates.lunarclientcdn.com/latest-ow.yml -AllowWindowsInsider --disable-change-location --disable-ow-shortcut-ui --disable-app-shortcut-ui --enable-app-shortcut --eula-url=https://www.lunarclient.com/terms --privacy-url=https://www.lunarclient.com/privacy --silent-setup --app-name="Lunar Client" --auto-close -exepath C:\Users\<USER>\Desktop\Lunar Client - Installer.exe
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: UserInfo.dll — C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\UserInfo.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: System.dll — C:\Users\<USER>\AppData\Local\Temp\nsmB5A5.tmp\System.dll
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 104.18.29.96 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 3.169.202.80 — 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.
MITRE T1055 (Process Injection) observed — CreateRemoteThread / APC / reflective-DLL injection. The payload is being smuggled into a legitimate process to bypass AV hooks.
EvidenceC:\Windows\System32\svchost.exe -k NetworkService -pSandbox observed process activity targeting LSASS (Windows credential store). Legitimate software has no business reading LSASS memory — this is Mimikatz-shape behaviour.
EvidenceC:\Windows\system32\lsass.exeThe 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.
Evidence104.18.29.96 · 3.169.202.80 · 18.154.101.114
0 of 73 engines flagged this file
View all 73 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
Barely seen in the wild and first surfaced recently. That limits reputation evidence, but rarity alone is not proof of malware.
Fingerprint and provenance
- File name
- Lunar Client - Installer.exe
- Format
- Win32 EXE
- Code signing
- Signature valid: Overwolf Ltd
- Size
- 3.1 MB
- Last analyzed
- Jul 7, 2026, 9:19 PM UTC
57fac95018b945565454396e7481619c07cd6b13acdbdd3342577ebcd51263b6Safety & 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
Install it only when it came from the developer's official site or an official app store.
- 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 Lunar Client - Installer.exe safe?
What is Lunar Client - Installer.exe?
How many antivirus engines detected Lunar Client - Installer.exe?
Is Lunar Client - Installer.exe digitally signed?
What is the SHA-256 hash of Lunar Client - Installer.exe?
Is it safe to install Lunar Client - Installer.exe?
How up to date is this analysis of Lunar Client - Installer.exe?
Community
Member reviews and reports for this exact file hash.