File scan report
Verdict Safe
Is Save4k-
Save4k installer with no detections from any of 75 antivirus engines, a valid code signature and a clean sandbox run showing ordinary app installation.
Read the whole reasonShow less
Strong evidence · A verified publisher signature, and no engine flags it.
This installer can be used if it came from Save4k's official download page. Decline any extra offers during setup and keep your security software enabled.
Good practice2 tips
We found nothing harmful in this file.
Install it only if it came from the developer's own website or an official app store.
Keep your antivirus and Windows updates switched on.
No scanner can promise a file is 100% safe.
Antivirus results
0 of 68 flagged
- Flagged 0
- No detection 68
- No result 7
- Code signing Bui Xuan Mai
- Test run Completed
- First seen 20d ago
Chapter 02
Why we think so
3 points against it and 4 in its favour, checked against the scan evidence.
The reasoning behind this verdict
None of the 68 antivirus engines that checked it flagged this Save4k setup file, and its code signature verifies. In the sandbox it installed a desktop app into the user's profile, added a startup entry and registered a link handler. These are normal installer actions, and no injection target or harmful activity was recorded.
None of the 68 antivirus engines that checked it flagged the file, including all 17 major antivirus engines that returned results. The installer carries a valid signature from an individual developer, though we hold no prior history for that signer. The single sandbox run returned clean and shows a standard Inno Setup install of a Flutter-based app, a per-user startup entry and a custom URL protocol registration. Technique mappings such as credential access or injection appeared without any injected process or target, which is typical noise for installers. Similar-looking files in our records share only the installer framework, not the publisher, so they say little about this file.
What We Detected
None of the 68 antivirus engines that checked it flagged this file. It is signed with a valid certificate issued to Bui Xuan Mai, a signer without an established history in our records. Around 134 different sources submitted it in its first 10 days.
Threat Behavior
The sandbox run returned clean. The setup extracted its Inno Setup helper, installed Save4k with Flutter plugin DLLs under the user's local Programs folder, added a startup entry in the current user's Run key and registered a save4k link protocol. Only the analysis machine's own background traffic was observed on the network.
What To Do Now
If you downloaded this from Save4k's official source, it appears fine to install. During setup, watch for any bundled third-party offers. You can disable the startup entry in Task Manager if you do not want the app launching automatically. Keep your antivirus enabled.
Where this verdict could be wrong2 caveats
- The installer shares its build fingerprint with two bundleware installers we previously linked to OfferCore. That match comes from a shared installer framework, not the same publisher, but it is a reason to watch for bundled offers during setup.
- The signer is an individual name with no prior history in our records. A clean scan today does not establish a long-term reputation.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- None of the 68 antivirus engines that checked it flagged the file
- Valid code signature
- The sandbox run returned clean, showing a normal per-user application install
- Widely submitted by many independent sources
- The signer is an individual developer with no prior history in our records
- The app adds itself to Windows startup for the current user
- The installer framework matches some bundleware installers seen previously
6 sources checked · all complete. See every source
Chapter 03
What it did in our test
It ran in our isolated test environment; no test environment rated what it did as risky.
Test run summary
Capture complete- 29sandbox rule tags
- 6spawned processes
- 0network contacts
- 35filesystem & mutex artifacts
What this file did when executed
This file was run in a sandbox and its runtime behaviour was observed.
Sandbox verdicts
1- VT: CLEANclean
Techniques observed in the sandbox
29MITRE ATT&CK techniques the sandbox mapped. Highlighted ones are rare in normal software; the others are common in legitimate programs too.
- T1003· Credential theft
- T1005
- T1027· Obfuscated code
- T1027.002· Obfuscated code
- T1033· Reads user info
- T1036
- T1055· Process injection
- T1069
- T1070· Covers its tracks
- T1071· Application protocol
- T1082· System recon
- T1112
- T1129· Loads modules
- T1202
- T1485
- T1486· File encryption
- T1497· Sandbox evasion
- T1547· Auto-start
- T1547.001· Auto-start
- T1548
- T1552· Credential search
- T1552.001· Credential search
- T1553
- T1553.002
- T1555· Password stealing
- T1555.003· Password stealing
- T1564· Hides artifacts
- T1564.003· Hides artifacts
- T1574· Execution hijack
Observed activity
Processes started
6Programs the file ran, with their command lines.
save4k_1.0.10.exe"C:\Users\<USER>\Desktop\save4k_1.0.10.exe"save4k_1.0.10.tmp"C:\Users\<USER>\AppData\Local\Temp\is-C3XFDKNSO7.tmp\save4k_1.0.10.tmp" /SL5="$60056,40216850,978432,C:\Users\<USER>\Desktop\save4k_1.0.10.exe"save4k.exe"C:\Users\<USER>\AppData\Local\Programs\Save4k\save4k.exe"regreg add HKCU\SOFTWARE\Classes\save4k /ve /d "URL:Save4k Protocol" /f59673570e86ebba898b46da416b6d62aa18f59e63c8fe8b2386b4d3d088d3aa6.exeC:\Users\<USER>\AppData\Local\Temp\is-5BO0XV02IO.tmp\59673570e86ebba898b46da416b6d62aa18f59e63c8fe8b2386b4d3d088d3aa6.tmp /SL5=$70152,40216850,978432,C:\Users\<USER>\Downloads\59673570e86ebba898b46da416b6d62aa18f59e63c8fe8b2386b4d3d088d3aa6.exeexecutable.exe"C:\Users\user\Desktop\executable.exe"
Files
30Files the file created, changed or deleted.
- Written
C:\Users\<USER>\AppData\Local\Temp\is-C3XFDKNSO7.tmp\save4k_1.0.10.tmp - Written
C:\Users\<USER>\AppData\Local\Temp\is-WJ40LB9HMF.tmp\_isetup\_setup64.tmp - Written
C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\iconcache_idx.db - Written
C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\iconcache_256.db - Written
C:\Users\<USER>\AppData\Local\Microsoft\Windows\Explorer\iconcache_48.db - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\connectivity_plus_plugin.dll
Show all 30 entries for files
- Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\desktop_drop_plugin.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\flutter_windows.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\flutter_secure_storage_windows_plugin.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\local_notifier_plugin.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\d3dcompiler_47.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\flutter_inappwebview_windows_plugin.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\hotkey_manager_windows_plugin.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\tray_manager_plugin.dll - Written
C:\Users\<USER>\AppData\Local\Programs\Save4k\desktop_multi_window_plugin.dll - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-O1AQMVGQON.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-2F2PIC8QCU.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-W4ZCWYYSEH.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-5VT47KX98J.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-EOFVPTWAZY.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-AB8MW7MKJ3.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-J1NBA6HA24.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-H824KD7IJ5.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-0DKNWKCWC2.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-5LIM6G9E5G.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-L4K74J6S7P.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-3HADGE4F75.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-01SB9DQGVM.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-CEGPYV4BKR.tmp - Deleted
C:\Users\<USER>\AppData\Local\Programs\Save4k\is-N4ACENMRCQ.tmp
Registry and auto-start
18Settings the file changed, including ways to start again after a restart.
- Auto-start
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Save4k - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\RestartManager\Session0000\RegFiles0000 - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\RestartManager\Session0000\RegFilesHash - Set
HKEY_CURRENT_USER\Software\Classes\save4k\(Default) - Set
HKEY_CURRENT_USER\Software\Classes\save4k\DefaultIcon\(Default) - Set
HKEY_CURRENT_USER\Software\Classes\save4k\shell\open\command\(Default)
Show all 18 entries for registry and auto-start
- Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\Inno Setup: Setup Version - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\Inno Setup: App Path - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\InstallLocation - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\Inno Setup: Icon Group - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\Inno Setup: User - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\Inno Setup: Selected Tasks - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\Inno Setup: Deselected Tasks - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\Inno Setup: Language - Set
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{B5AF1C3D-84A7-4E69-9C2A-6D4E8F1B7C20}_is1\DisplayName - Deleted
HKEY_CURRENT_USER\SOFTWARE\Microsoft\RestartManager\Session0000\SessionHash - Deleted
HKEY_CURRENT_USER\SOFTWARE\Microsoft\RestartManager\Session0000\Owner - Deleted
HKEY_CURRENT_USER\SOFTWARE\Microsoft\RestartManager\Session0000\Sequence
Mutexes
5Named locks a program uses so only one copy runs; malware families often reuse them.
cversions.3.mLocal\com.save4k.app.single_instanceGlobal\OneSettingQueryMutex+compat+encapsulation\Sessions\1\BaseNamedObjects\Local\RstrMgr3887CAB8-533F-4C85-B0DC-3E5639F8D511\Sessions\1\BaseNamedObjects\Local\RstrMgr-3887CAB8-533F-4C85-B0DC-3E5639F8D511-Session0000
Sandbox background — not the file
11The analysis machine's own processes and connections, recorded in every run.
- VM process
Explorer.EXEC:\Windows\Explorer.EXE - VM process
services.exeC:\Windows\system32\services.exe - VM process
svchost.exeC:\Windows\System32\svchost.exe -k NetworkService -p - VM process
svchost.exeC:\Windows\system32\svchost.exe -k UnistackSvcGroup - VM process
svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s StorSvc - VM process
svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s WdiSystemHost
Show all 11 entries for sandbox background — not the file
- VM process
lsass.exeC:\Windows\system32\lsass.exe - VM process
svchost.exeC:\Windows\system32\svchost.exe -k LocalService -s W32Time - VM process
svchost.exeC:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p - VM host
a1672.dscr.akamai.net - VM host
162.159.36.2
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache. 10 have no saved verdict and were not checked; that is missing coverage, not a finding.
- 5faabae1ad45349d5edd…77b08dNot checkedno saved verdict
- 79cd00b3953ddba2debe…a5fff4Not checkedno saved verdict
- 576f35f8930642d5fecd…5c59d8Not checkedno saved verdict
- e3f9d20a291da78b4efb…c06c7dNot checkedno saved verdict
- 13606d714e56601a2917…9b9303Not checkedno saved verdict
- c00dadd330da28ffbb8d…94b4e3Not checkedno saved verdict
- 69fbc7e8be78c42b5ce7…fd40ceNot checkedno saved verdict
- e94e1c87112901e17f09…f1a4ddNot checkedno saved verdict
- ba21e4531c2fd935d4a9…149489Not checkedno saved verdict
- d6b1829495f3a6e80247…c67cc8Not checkedno saved verdict
Chapter 04
Technical details
None of the 68 antivirus engines that checked it flag it; signed by Bui Xuan Mai.
Sources checked
Every check behind this verdict
6 sources checked · all complete. Complete means the check returned a usable result; it does not mean the file is safe.
File fingerprint
- Last analyzed
- Oct 16, 2026, 7:31 PM UTC
- SHA-256
59673570e86ebba898b46da416b6d62aa18f59e63c8fe8b2386b4d3d088d3aa6- SHA-1
68b3211f500ca331015f44e4eec15cb5537ee623- MD5
caba1a80569210d873ebdfa6ed67f177
About this file
Save4k-1.0.10-windows-x64-setup.exe is a Win32 EXE file of 41.5 MB.
- Type and size
- Win32 EXE · 41.5 MB
- Signer
- Bui Xuan MaiValid code signature.
- First seen
- Oct 6, 2026On VirusTotal.
- Submitted by
- 134 distinct sources
- Packer
- None detected
- Entropy
- 6.36 of 8
First scanned Updated
Antivirus consensus
0 of 68 engines flagged this file
7 of the 75 engines returned no result for this file (file type not supported, or the scan did not finish), so they did not check it.
- Tier-118 engines0flagged
- Tier-234 engines0flagged
- Low-trust16 engines0flagged
View all 75 engine results
- AcronisClean
- AhnLab-V3Clean
- AlibabaClean
- alibabacloudClean
- ALYacClean
- Antiy-AVLClean
- APEXClean
- ArcabitClean
- AvastClean
- Avast-MobileNo result
- AVGClean
- AviraClean
- BitDefenderClean
- BitDefenderFalxNo result
- BkavClean
- CAT-QuickHealClean
- ClamAVClean
- CMCClean
- CrowdStrikeClean
- CTXClean
- CylanceClean
- CynetNo result
- DeepInstinctClean
- DrWebClean
- ElasticClean
- EmsisoftClean
- ESET-NOD32Clean
- F-SecureClean
- FortinetClean
- GDataClean
- GoogleNo result
- GridinsoftClean
- huorongClean
- IkarusClean
- JiangminClean
- K7AntiVirusClean
- K7GWClean
- KasperskyClean
- KingsoftClean
- LionicClean
- MalwarebytesClean
- MaxSecureClean
- McAfeeDClean
- MicrosoftClean
- MicroWorld-eScanClean
- NANO-AntivirusClean
- PaloaltoClean
- PandaClean
- RisingClean
- SangforClean
- SentinelOneClean
- SkyhighClean
- SophosClean
- SUPERAntiSpywareClean
- SymantecClean
- SymantecMobileInsightNo result
- TACHYONClean
- tehtrisNo result
- TencentClean
- TrapmineClean
- TrellixENSClean
- TrendMicroClean
- TrendMicro-HouseCallClean
- TrustlookNo result
- VaristClean
- VBA32Clean
- VIPREClean
- VirITClean
- ViRobotClean
- WebrootClean
- XcitiumClean
- YandexClean
- ZillyaClean
- ZoneAlarmClean
- ZonerClean
Signatures and behavior heuristics
Behavioral heuristics matched patterns associated with malware. Corroborating evidence determines how much weight they carry.
The sandbox recorded persistence through a Run key or Startup-folder entry. Installers set these up legitimately for their own updaters and services, so this is context, not proof of malicious intent.
EvidenceHKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Save4kVirusTotal's sandbox summary maps this run to MITRE T1055 (Process Injection), but no injected process of the sample's own was recorded (the analysis VM's own WMI adapter, crash handlers and Chrome updater are not counted). VirusTotal maps T1055 on about half of all files no engine flags, so the mapping alone is not evidence of injection.
EvidenceT1055 (sandbox MITRE mapping)VirusTotal's sandbox summary maps this run to MITRE T1003 (OS Credential Dumping), but no process targeting LSASS or another credential store was recorded. VirusTotal maps T1003 on clean files more often than on detected ones, so the mapping alone is not evidence of credential theft.
EvidenceT1003 (sandbox MITRE mapping)
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
Lots of people are uploading this but it's recent — typical of newly-released legitimate software. Low prior for malware.
Chapter 05
Questions & answers
Short answers to the 7 questions people ask most about this file.
Is Save4k-1.0.10-windows-x64-setup.exe safe?
What is Save4k-1.0.10-windows-x64-setup.exe?
How many antivirus engines detected Save4k-1.0.10-windows-x64-setup.exe?
Is Save4k-1.0.10-windows-x64-setup.exe digitally signed?
What is the SHA-256 hash of Save4k-1.0.10-windows-x64-setup.exe?
Is it safe to install Save4k-1.0.10-windows-x64-setup.exe?
How up to date is this analysis of Save4k-1.0.10-windows-x64-setup.exe?
Community
Member reviews and reports for this exact file hash.