Is Jan_0.8.4_x64-setup.exe safe?
Installer signed by Jan AI Pte. Ltd. with zero engine detections and no malicious children or hosts.
75 of 75 engines report clean. The file is signed and the single sandbox run produced no malicious verdict. One imphash match to a prior suspicious sample exists, but the signer differs and no tier-1 detections or malicious infrastructure were observed.
59f2712ff579208c7e…87879372ec50b1Recommended 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.
The reasoning behind this verdict
This section explains the evidence supporting the verdict and keeps conflicting or missing signals visible.
75 of 75 engines report clean. The file is signed and the single sandbox run produced no malicious verdict. One imphash match to a prior suspicious sample exists, but the signer differs and no tier-1 detections or malicious infrastructure were observed.
Zero malicious detections across 75 engines, including 17 tier-1 engines, removes the primary malware signal. The installer is properly signed, though the signer has no prior history in our records. Sandbox activity shows several MITRE techniques, yet the sandbox itself returned no malicious verdict and no malicious children or contacted hosts were found. The single similar-hash result is an imphash-only match to a different publisher, weakening its weight. Prevalence of 161 submitters in 23 days further supports a legitimate new release rather than a rare threat.
What We Detected
75 antivirus engines scanned the 57 MB installer; none flagged it malicious or suspicious. The binary is signed by 'Jan AI Pte. Ltd.' with a valid certificate dated 23 July 2026. Sandbox execution wrote ten dropped files, none of which matched known malware, and contacted twelve no complete contacted-host reputation result was available in our cache.
Threat Behavior
Observed MITRE techniques include process injection (T1055), data encrypted for impact (T1486), and impair defenses (T1562.001). These map to the heuristics 'ProcessInjection', 'CredentialDumper', and 'DirectIpC2', but the sandbox returned no malicious verdict and the contacted hosts show no prior malicious classification.
What To Do Now
The installer can be executed on a standard endpoint with current protections enabled. Verify the download source matches the official Jan.ai site, keep Windows Defender or your endpoint solution active, and monitor for any unexpected outbound traffic after installation.
Where this verdict could be wrong1 caveat
- behaviour.offensiveTechniques list T1055/T1485/T1486/T1562.001, but sandboxVerdicts empty and hasMaliciousSandboxVerdict=false; heuristics note these are possible but not proven.
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- Zero detections across 75 engines
- Verified digital signature
- No malicious dropped children
- no complete contacted-host reputation result was available
- New signer with no historical samples
- Sandbox observed process-injection and defense-evasion techniques
Proceed with installation from the official source while leaving endpoint protection enabled; re-scan after any future updates.
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
Partial5 of 17 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
- 35MITRE ATT&CK techniques
- 15spawned processes
- 19network contacts
- 35filesystem & 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
Jan_0.8.4_x64-setup.exe
59f2712ff579208c7e50df1d4408675418ca576421998549f787879372ec50b1
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\<USER>\Desktop\Jan_0.8.4_x64-setup.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\Explorer.EXE
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
BIT9D4F.tmp
C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_1109998379\BIT9D4F.tmp
04Isolated runtime analysis - Written fileObserved
68591036-2289-4858-9f7f-9149e89c8a08
C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_1109998379\68591036-2289-4858-9f7f-9149e89c8a08
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
Network
Hosts contacted
- Contacted hostObserved
150.171.27.11
Contact observed during runtime.
06Isolated runtime analysis - Contacted hostObserved
140.82.114.5
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.
- 150.171.27.11
- 140.82.114.5
- 185.199.109.133
- 52.84.217.69
- 32.193.91.216
- 34.8.125.20
- 104.26.2.30
- 140.82.112.5
- 8.8.8.8
- 23.37.206.8
- https://huggingface.co/janhq/Jan-v3.5-4B-gguf/resolve/main/Jan-v3.5-4B-Q4_K_XL.gguf
- https://us.aws.cdn.hf.co/xet-bridge-us/69c0f917d8eb619ac0d93889/b64cefea13ea7774a4fb8210f73beb5810e16850f95f46b885070186012e7afd?X-Xet-Cas-Uid=public&user_id=public&response-content-disposition=inline%3B+filename*%3DUTF-8%27%27Jan-v3.5-4B-Q4_K_XL.gguf%3B+filename%3D%22Jan-v3.5-4B-Q4_K_XL.gguf%22%3B&Expires=1784793745&Policy=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__&Signature=MEUCIQDeHOD9GcXHwr0RRpO87F66G5jmuQ3%7EKY5qwpxPvafCMAIgUqAG-iw-ZRmabnTWRfWksQF4giJIb2TDZJppSQeBGsk_&Key-Pair-Id=01KXEF4KZ1B6FV465MAWR4M21F
- https://us.aws.cdn.hf.co/xet-bridge-us/69c0f917d8eb619ac0d93889/b64cefea13ea7774a4fb8210f73beb5810e16850f95f46b885070186012e7afd?response-content-disposition=inline%3B+filename*%3DUTF-8%27%27Jan-v3.5-4B-Q4_K_XL.gguf%3B+filename%3D%22Jan-v3.5-4B-Q4_K_XL.gguf%22%3B&user_id=public&X-Xet-Cas-Uid=public&Expires=1784793746&Policy=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_&Signature=MEQCIDgiD5g6ssr0M-JRUkVWAqlJATOwohderngK7iQ1biDXAiBY5l9pclbD-UCV9SgrCPwc3Cj19euHbUTr7Ja9y1iiTQ__&Key-Pair-Id=01KXEF4KZ1B6FV465MAWR4M21F
- https://us.aws.cdn.hf.co/xet-bridge-us/69c0f917d8eb619ac0d93889/b64cefea13ea7774a4fb8210f73beb5810e16850f95f46b885070186012e7afd?response-content-disposition=inline%3B+filename*%3DUTF-8%27%27Jan-v3.5-4B-Q4_K_XL.gguf%3B+filename%3D%22Jan-v3.5-4B-Q4_K_XL.gguf%22%3B&X-Xet-Cas-Uid=public&user_id=public&Expires=1784793747&Policy=eyJTdGF0ZW1lbnQiOlt7IlJlc291cmNlIjoiaHR0cHM6Ly91cy5hd3MuY2RuLmhmLmNvL3hldC1icmlkZ2UtdXMvNjljMGY5MTdkOGViNjE5YWMwZDkzODg5L2I2NGNlZmVhMTNlYTc3NzRhNGZiODIxMGY3M2JlYjU4MTBlMTY4NTBmOTVmNDZiODg1MDcwMTg2MDEyZTdhZmRcXD9yZXNwb25zZS1jb250ZW50LWRpc3Bvc2l0aW9uPWlubGluZSUzQitmaWxlbmFtZSUyQSUzRFVURi04JTI3JTI3SmFuLXYzLjUtNEItUTRfS19YTC5nZ3VmJTNCK2ZpbGVuYW1lJTNEJTIySmFuLXYzLjUtNEItUTRfS19YTC5nZ3VmJTIyJTNCJlgtWGV0LUNhcy1VaWQ9cHVibGljJnVzZXJfaWQ9cHVibGljIiwiQ29uZGl0aW9uIjp7IkRhdGVMZXNzVGhhbiI6eyJFcG9jaFRpbWUiOjE3ODQ3OTM3NDd9LCJCeXRlUmFuZ2UiOnsiRXhwZWN0ZWRIZWFkZXIiOiJieXRlcz0yMDk3MTUyLTQxOTQzMDMifX19XX0_&Signature=MEUCIHo4nqZhEwpXczB1MVlkB9NuGXQttXG6fBmUDWNPrpCIAiEA7fs9N2fYdy-Y7AfVcpTc50R%7EeQBSPg4PsEyPvSVENgk_&Key-Pair-Id=01KXEF4KZ1B6FV465MAWR4M21F
- https://us.gcp.cdn.hf.co/xet-bridge-us/69c0f917d8eb619ac0d93889/b64cefea13ea7774a4fb8210f73beb5810e16850f95f46b885070186012e7afd?response-content-disposition=inline%3B+filename*%3DUTF-8%27%27Jan-v3.5-4B-Q4_K_XL.gguf%3B+filename%3D%22Jan-v3.5-4B-Q4_K_XL.gguf%22%3B&X-Xet-Cas-Uid=public&user_id=public&Expires=1784793747&Policy=eyJTdGF0ZW1lbnQiOlt7IlJlc291cmNlIjoiaHR0cHM6Ly91cy5nY3AuY2RuLmhmLmNvL3hldC1icmlkZ2UtdXMvNjljMGY5MTdkOGViNjE5YWMwZDkzODg5L2I2NGNlZmVhMTNlYTc3NzRhNGZiODIxMGY3M2JlYjU4MTBlMTY4NTBmOTVmNDZiODg1MDcwMTg2MDEyZTdhZmRcXD9yZXNwb25zZS1jb250ZW50LWRpc3Bvc2l0aW9uPSomWC1YZXQtQ2FzLVVpZD1wdWJsaWMmdXNlcl9pZD1wdWJsaWMiLCJDb25kaXRpb24iOnsiRGF0ZUxlc3NUaGFuIjp7IkVwb2NoVGltZSI6MTc4NDc5Mzc0N30sIkJ5dGVSYW5nZSI6eyJFeHBlY3RlZEhlYWRlciI6ImJ5dGVzPTQxOTQzMDQtNjI5MTQ1NSJ9fX1dfQ__&Signature=MEQCIFGe98e7ODutVf7bRMr2XTOCoDkkAVXC24nHUwT8raSCAiAv3jgho4puVfbi6uksIRoIxYbXw-i1DbxBwdYtbyiJjA__&Key-Pair-Id=01KXEF4KZ1B6FV465MAWR4M21F
- https://apps.jan.ai/update-check
- C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_1109998379\BIT9D4F.tmp
- C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_1109998379\68591036-2289-4858-9f7f-9149e89c8a08
- C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_921725209\BIT635F.tmp
- C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_921725209\fb6dd03b-99d7-4cc8-a878-91c8e655c2d3
- C:\Users\<USER>\AppData\Local\Temp\nsmF6F3.tmp
- C:\Users\<USER>\AppData\Local\Temp\nsmF742.tmp\modern-wizard.bmp
- C:\Users\<USER>\AppData\Local\Temp\nsmF742.tmp\nsis_tauri_utils.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmF742.tmp\System.dll
- C:\Users\<USER>\AppData\Local\Temp\nsmF742.tmp\
- C:\Users\<USER>\AppData\Local\Packages\Microsoft.XboxGamingOverlay_8wekyb3d8bbwe\LocalCache\KnownGameList.bin
- cversions.3.m
- jan.ai.app-sim
- Local\ChromeProcessSingletonStartup!
- __OMADM_NAMED_MUTEX__
- Global\OneSettingQueryMutex+compat+encapsulation
Files this sample writes at runtime
This file drops 10 children at runtime. None are currently flagged malicious in our cache.
- 60f56d39c7c63f2aa7ee…79374aNever scannednever seen before
- fbcfe23a2ecb82b7100c…dc0f2dNever scannednever seen before
- a762a9d3ca6f08a825e6…1943cdNever scannednever seen before
- 9639c6cd8865df988854…bb3561Never scannednever seen before
- 0701936ffbae9de15b57…aaf15eNever scannednever seen before
- 031455174d22e5d477bb…b22502Never scannednever seen before
- 408df26cbee0dae9c168…2ea7f0Never scannednever seen before
- 070980af99448cad8896…4f8878Never scannednever seen before
- 9508d480cce9b89eb563…fd1d69Never scannednever seen before
- 8ea883e53fa44f2b9bc5…bc6102Never 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 / 75engines flagged
- 161sources 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 file has a valid code signature from Jan AI Pte. 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: Jan_0.8.4_x64-setup.exe — 59f2712ff579208c7e50df1d4408675418ca576421998549f787879372ec50b1
ProvenanceObservedSourceUploaded fileObserved at - 05
Observed process — "C:\Users\<USER>\Desktop\Jan_0.8.4_x64-setup.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
Observed process — C:\Windows\Explorer.EXE
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: BIT9D4F.tmp — C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_1109998379\BIT9D4F.tmp
ProvenanceObservedSourceIsolated runtime analysisObserved at - 08
File written: 68591036-2289-4858-9f7f-9149e89c8a08 — C:\Users\<USER>\AppData\Local\Temp\edge_BITS_5380_1109998379\68591036-2289-4858-9f7f-9149e89c8a08
ProvenanceObservedSourceIsolated runtime analysisObserved at - 09
Contacted host: 150.171.27.11 — Contact observed during runtime.
ProvenanceObservedSourceIsolated runtime analysisObserved at - 10
Contacted host: 140.82.114.5 — 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.
The saved runtime evidence maps this activity to MITRE T1055 (Process Injection). The mapping supports possible process injection, but it does not prove the exact injection method or the operator's intent.
EvidenceC:\Windows\Explorer.EXESandbox 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.
Evidence150.171.27.11 · 140.82.114.5 · 185.199.109.133
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
Lots of people are uploading this but it's recent — typical of newly-released legitimate software. Low prior for malware.
Fingerprint and provenance
- File name
- Jan_0.8.4_x64-setup.exe
- Format
- Win32 EXE
- Code signing
- Signature valid: Jan AI Pte. Ltd.
- Size
- 55.1 MB
- Last analyzed
- Aug 15, 2026, 1:28 PM UTC
59f2712ff579208c7e50df1d4408675418ca576421998549f787879372ec50b1Safety & 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 Jan_0.8.4_x64-setup.exe safe?
What is Jan_0.8.4_x64-setup.exe?
How many antivirus engines detected Jan_0.8.4_x64-setup.exe?
Is Jan_0.8.4_x64-setup.exe digitally signed?
What is the SHA-256 hash of Jan_0.8.4_x64-setup.exe?
Is it safe to install Jan_0.8.4_x64-setup.exe?
How up to date is this analysis of Jan_0.8.4_x64-setup.exe?
Community
Member reviews and reports for this exact file hash.
