Analysis
- user interaction
yes - max time kernel
37s - max time network
38s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
23/07/2026, 18:06
General
- Target KirkinatorBootstrapper.exe
- Size 3.2MB
- Sample260723-wp49vsstcw
- SHA256 8e6c38320ff9520bee5cacd6def91c7d396738319e2f0f4b513a1b34a9ef004a
Malware Config
Signatures
- Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
- Checks BIOS information in registry 2 TTPs 4 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- Themida packer 17 IoCs
Detects Themida, an advanced Windows software protection system.
- Checks whether UAC is enabled 1 TTPs 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Executes a command shell one-liner 1 TTPs 3 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Suspicious behavior: EnumeratesProcesses 26 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\KirkinatorBootstrapper.exe"C:\Users\Admin\AppData\Local\Temp\KirkinatorBootstrapper.exe"1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c cls2⤵
- Executes a command shell one-liner
-
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C:\Program Files\7-Zip\7z.exe"C:\Program Files\7-Zip\7z.exe" x -y "-oC:\Users\Admin\AppData\Local\Temp\app" "C:\Users\Admin\AppData\Local\Temp\KirkinatorBootstrap\kirkinator_update_dl.rar"2⤵
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\app\Kirkinator.exe"C:\Users\Admin\AppData\Local\Temp\app\Kirkinator.exe"2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c cls3⤵
- Executes a command shell one-liner
-
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c cls3⤵
- Executes a command shell one-liner
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
kirkinator_update_dl.rar
Kirkinator.exe
VMProtectSDK64.dll
memory/1696-3-0x00007FF6E5E40000-0x00007FF6E6723000-memory.dmp
memory/1696-25-0x00007FF6E5E40000-0x00007FF6E6723000-memory.dmp
memory/1696-0-0x00007FF6E5E40000-0x00007FF6E6723000-memory.dmp
memory/1696-6-0x00007FF6E5E40000-0x00007FF6E6723000-memory.dmp
memory/1696-5-0x00007FF6E5E89000-0x00007FF6E5E8A000-memory.dmp
memory/1696-2-0x00007FF6E5E40000-0x00007FF6E6723000-memory.dmp
memory/1696-1-0x00007FF6E5E40000-0x00007FF6E6723000-memory.dmp
memory/1696-4-0x00007FF6E5E40000-0x00007FF6E6723000-memory.dmp
memory/4084-28-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-23-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-27-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-26-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-29-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-30-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-31-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-32-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp
memory/4084-34-0x00007FF7268F0000-0x00007FF7272BB000-memory.dmp