Is KG_UP_Installer.exe safe?
Unsigned packed installer with two tier-1 detections and three prior imphash matches flagged malicious.
12 of 75 engines flagged the file, including two tier-1 engines. The binary is unsigned, shows high-entropy packed code, and three similar imphash samples were previously marked malicious. Sandbox execution produced no malicious verdict, but the combination of signals keeps the file in mixed territory.
1355df85452640f1c1…72491ecbd00215Recommended next actions
Before installing
Do not install it until the source and publisher can be verified independently.
If you already installed it
Stop using it, scan the device, and watch for unexpected behavior or security alerts. Download a fresh installer from the developer's official site or an official app store.
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.
12 of 75 engines flagged the file, including two tier-1 engines. The binary is unsigned, shows high-entropy packed code, and three similar imphash samples were previously marked malicious. Sandbox execution produced no malicious verdict, but the combination of signals keeps the file in mixed territory.
Two tier-1 engines returned malicious labels while the remaining tier-1 engines stayed silent, producing a weak rather than decisive consensus. The file is unsigned and exhibits high-entropy sections consistent with packing, a pattern that frequently appears in droppers. Three of five prior imphash matches were classified malicious, reinforcing the risk. Sandbox runs did not yield a malicious verdict and no complete contacted-host reputation result was available were contacted, yet the absence of a complete host-reputation check leaves a coverage gap. The overall evidence mix supports a suspicious classification rather than a clean or outright malicious call.
What We Detected
12 of 75 engines flagged KG_UP_Installer.exe. Two tier-1 engines (Sophos, TrendMicro-HouseCall) returned malicious labels; the rest of the tier-1 set remained clean. The binary is unsigned, contains high-entropy code sections, and is marked likely packed. One sandbox execution recorded the defensive-impairment technique T1562.001 but returned no malicious verdict.
Threat Behavior
Static signals include packing, an installer filename pattern, and three prior imphash matches previously tied to malwarex or generic-trojan families. No dropped children or contacted domains were observed. Host-reputation coverage is incomplete because contactedHosts data is absent.
What To Do Now
Do not execute the file on production systems. Keep endpoint protection enabled and consider submitting the sample to a controlled sandbox for deeper behavioral inspection before any further use.
Where this verdict could be wrong2 caveats
- contactedHosts is null — no complete host-reputation cross-check available
- behaviour.hasMaliciousSandboxVerdict=false despite sandbox execution
These are the assessment's weak points. If you believe one applies to your file, report the verdict and we'll re-review it.
- medium prevalence across 758 sources
- no malicious sandbox verdict
- no dropped malicious children
- unsigned executable
- high-entropy packed code
- two tier-1 malicious detections
- prior imphash matches flagged malicious
- T1562.001 technique observed
Treat the file as suspicious; run it only in an isolated environment with current security software active.
Coverage & freshness
Complete means the check returned a usable result. It does not mean the file is safe.
Antivirus
Complete12 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
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
- 12MITRE ATT&CK techniques
- 2spawned processes
- 0network contacts
- 7filesystem & mutex artifacts
What this file does
Observed actions and their security significance
High concern: Attempted to impair or bypass security controls.
Moderate concern: Contained obfuscated or packed code that makes inspection harder.
Moderate concern: Scans through your files and folders.
Moderate concern: Checked the environment for virtualisation or analysis tools.
Moderate concern: Checks which security software you have installed.
Note: Reads your Windows user-account details.
Note: Listed running processes; both legitimate software and malware may do this.
These are observed capabilities from an isolated analysis. A technique does not prove malicious intent on its own, and the file never ran on your device.
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
KG_UP_Installer.exe
1355df85452640f1c198339ed16c1c0b37e536c2f6ea117e3f72491ecbd00215
01Uploaded file
Processes
Runtime execution
- ProcessObserved
Observed process
"C:\Users\user\Desktop\file.exe"
02Isolated runtime analysis - ProcessObserved
Observed process
C:\Windows\System32\WerFault.exe C:\Windows\system32\WerFault.exe -u -p 6408 -s 980
03Isolated runtime analysis - +1 more recorded observation in Analyst mode
Files
Created or changed
- Written fileObserved
8a652a1b-c4dd-4f4f-af99-55b4f503203e
C:\ProgramData\Microsoft\Windows\WER\Temp\8a652a1b-c4dd-4f4f-af99-55b4f503203e
04Isolated runtime analysis - Written fileObserved
b0a3ca41-8fcd-4312-9539-a06a5b14f25b
C:\ProgramData\Microsoft\Windows\WER\Temp\b0a3ca41-8fcd-4312-9539-a06a5b14f25b
05Isolated runtime analysis - +1 more recorded observation in Analyst mode
5 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.
- C:\ProgramData\Microsoft\Windows\WER\Temp\8a652a1b-c4dd-4f4f-af99-55b4f503203e
- C:\ProgramData\Microsoft\Windows\WER\Temp\b0a3ca41-8fcd-4312-9539-a06a5b14f25b
- C:\ProgramData\Microsoft\Windows\WER\Temp\b6568fae-fa99-4287-9e28-c14b9a0a135e
- C:\ProgramData\Microsoft\Windows\WER\Temp\e81fd3ee-8ba5-4881-924b-ca82b92dd1eb
- C:\Users\user\AppData\Roaming
- \Sessions\1\BaseNamedObjects\Local\WERReportingForProcess6408
- \Sessions\1\BaseNamedObjects\InventorySynchronizationInventoryApplicationFileMutex6928
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
- 12 / 75engines flagged
- 758sources in submission history
Why these facts are shown
Each statement identifies whether it was directly recorded or derived from saved scan facts.
- 01
12 of 75 antivirus engines flagged the file, including APEX and Bkav.
Verdict inputView chapterProvenanceObservedSourceAntivirus analysisObserved at - 02
The hash has been submitted 921 times from 758 sources.
ProvenanceDerivedSourceSaved report factsObserved at - 03
Scanned file: KG_UP_Installer.exe — 1355df85452640f1c198339ed16c1c0b37e536c2f6ea117e3f72491ecbd00215
ProvenanceObservedSourceUploaded fileObserved at - 04
Observed process — "C:\Users\user\Desktop\file.exe"
ProvenanceObservedSourceIsolated runtime analysisObserved at - 05
Observed process — C:\Windows\System32\WerFault.exe C:\Windows\system32\WerFault.exe -u -p 6408 -s 980
ProvenanceObservedSourceIsolated runtime analysisObserved at - 06
File written: 8a652a1b-c4dd-4f4f-af99-55b4f503203e — C:\ProgramData\Microsoft\Windows\WER\Temp\8a652a1b-c4dd-4f4f-af99-55b4f503203e
ProvenanceObservedSourceIsolated runtime analysisObserved at - 07
File written: b0a3ca41-8fcd-4312-9539-a06a5b14f25b — C:\ProgramData\Microsoft\Windows\WER\Temp\b0a3ca41-8fcd-4312-9539-a06a5b14f25b
ProvenanceObservedSourceIsolated runtime analysisObserved at
Detection sources at a glance
Category: generic-trojan
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.
PE is packed (high-entropy code or known packer) AND unsigned AND at least one engine flagged it. Packing alone is common in legit software; packing + unsigned + signal is the malware-dropper pattern.
Evidencehigh-entropy code section
12 of 75 engines flagged this file
View all 75 engine results
Section entropy & packers
Executable sections have high entropy (7.2+) — the code is compressed or encrypted and only decrypted at runtime. Classic packing behaviour.
How widely this file has been seen
Moderate prevalence — neither rare nor common. No strong prior applies.
Fingerprint and provenance
- File name
- KG_UP_Installer.exe
- Format
- Win32 EXE
- Code signing
- No verified publisher
- Size
- 392.5 KB
- Last analyzed
- Aug 12, 2026, 1:31 PM UTC
1355df85452640f1c198339ed16c1c0b37e536c2f6ea117e3f72491ecbd00215Safety & FAQ
Complete recovery guidance and answers for the next decision.
What to do now
We couldn't fully clear this file. Treat it with caution.
- Recovery step 01
Don't install it unless you're certain it came from a source you trust.
- Recovery step 02
Check where you got it — an unexpected attachment or a random download link is a red flag.
- Recovery step 03
If its origin cannot be confirmed, delete this file and use a fresh copy from a trusted source. Download a fresh installer from the developer's official site or an official app store.
- Recovery step 04
If you're still unsure, scan it again in a day or two — detections often catch up on newer files.
Safety FAQ
Direct answers grounded in the saved verdict and evidence in this report.
Is KG_UP_Installer.exe safe, or is it malware?
What is KG_UP_Installer.exe?
How many antivirus engines detected KG_UP_Installer.exe?
What should I do if I already installed KG_UP_Installer.exe?
How do I remove KG_UP_Installer.exe?
What kind of malware is KG_UP_Installer.exe?
What is the SHA-256 hash of KG_UP_Installer.exe?
How up to date is this analysis of KG_UP_Installer.exe?
Community
Member reviews and reports for this exact file hash.