Analysis
- user interaction
yes - max time kernel
67s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
18/10/2026, 14:18
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
KRV FREE TEMP.exe
Resource
win10v2004-20260911-en
10 signatures
150 seconds
Behavioral task
behavioral2
Sample
KRV FREE TEMP.exe
Resource
win11ltsc2024-20260911-en
5 signatures
150 seconds
General
- Target KRV FREE TEMP.exe
- Size 19.8MB
- Sample261018-rmda5sfs2x
- SHA256 77e3c34f10b69063135f3710826973843adc319a0c18f7ae9678be97d91b210f
- MD5 35126f34fda0899e70d8f580b9a50570
- SHA1 2045baa6da682f06b71e96a5503963869cc1de2d
- SHA512 6922b41af927512d42231cb9227238c4dc9eccfbfe455fe27f9d86aca8c8bced4781552f7bdd049436067ff5bfdea1b66ae087b36bc87d62435f5018feb5ffef
- SSDEEP 393216:pSgFEpvVzAZjl8ELQhuT41T025QfviHWnJJmdQVtUb1qpu+g:pSpvVzAtJSuT4Z/QniHWJcCib1qpj
- TLSH T1A02712D528D083FCC742C639D24A16FAE6C938968EBA891B7FC658023571C55C8F7E39
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
Malware Config
Signatures
- Sets service image path in registry 3 TTPs 1 IoCs
This determines the executable launched when a service starts. It can be used to establish persistence.
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\nczkzmnmm\ImagePath = "System32\\drivers\\nczkzmnmm.sys" KRV FREE TEMP.exe - Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\System32\nczkzmnmm.sys KRV FREE TEMP.exe - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3616 KRV FREE TEMP.exe 3616 KRV FREE TEMP.exe - Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 3616 KRV FREE TEMP.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3616 KRV FREE TEMP.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\KRV FREE TEMP.exe"C:\Users\Admin\AppData\Local\Temp\KRV FREE TEMP.exe"1⤵
- Sets service image path in registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:3616
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1