Analysis
- user interaction
yes - max time kernel
58s - max time network
22s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
02/11/2026, 04:24
General
- Target NepTunnelSecure-5.2.0-Setup.exe
- Size 65.0MB
- Sample261102-e1ls8asw2j
- SHA256 14f8b5f6bf5500fa0238a314dc10101d9de8d72e1c4c6aa7d05f7f07f1fea00b
Malware Config
Signatures
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 56 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Detects Pyinstaller 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Inno Setup is an open-source installation builder for Windows applications. 3 IoCs
Inno Setup installer
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\NepTunnelSecure-5.2.0-Setup.exe"C:\Users\Admin\AppData\Local\Temp\NepTunnelSecure-5.2.0-Setup.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-907T2SJ755.tmp\NepTunnelSecure-5.2.0-Setup.tmp"C:\Users\Admin\AppData\Local\Temp\is-907T2SJ755.tmp\NepTunnelSecure-5.2.0-Setup.tmp" /SL5="$60212,66770602,1022976,C:\Users\Admin\AppData\Local\Temp\NepTunnelSecure-5.2.0-Setup.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Programs\NepTunnel Secure\NepTunnelSecure.exe"C:\Users\Admin\AppData\Local\Programs\NepTunnel Secure\NepTunnelSecure.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Programs\NepTunnel Secure\flet-runtime\flet\flet.exe"C:\Users\Admin\AppData\Local\Programs\NepTunnel Secure\flet-runtime\flet\flet.exe" tcp://localhost:50488 C:\Users\Admin\AppData\Local\Temp\vatMGJXFedQVAdSgnVTE "C:\Users\Admin\AppData\Local\Programs\NepTunnel Secure\_internal\assets"4⤵
- Executes dropped EXE
- Loads dropped DLL
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of SetWindowsHookEx
-
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
NepTunnelSecure.exe
VCRUNTIME140.dll
VCRUNTIME140_1.dll
_asyncio.pyd
_bz2.pyd
_cffi_backend.cp312-win_amd64.pyd
_ctypes.pyd
_decimal.pyd
_hashlib.pyd
_lzma.pyd
_overlapped.pyd
_queue.pyd
_socket.pyd
_sqlite3.pyd
_ssl.pyd
_uuid.pyd
_wmi.pyd
base_library.zip
cacert.pem
is-TWDKSLF35K.tmp
_rust.pyd
icons.json
libcrypto-3.dll
libffi-8.dll
libssl-3.dll
_cmsgpack.cp312-win_amd64.pyd
pyexpat.pyd
python3.DLL
python312.dll
select.pyd
is-MN8FRZLZPR.tmp
Lorem ipsum.txt
sqlite3.dll
unicodedata.pyd
flet.exe
NepTunnelSecure-5.2.0-Setup.tmp
memory/544-693-0x0000011018090000-0x00000110193D5000-memory.dmp
memory/544-697-0x0000011019400000-0x0000011019480000-memory.dmp
memory/544-698-0x0000011019400000-0x0000011019480000-memory.dmp
memory/544-692-0x0000011018090000-0x00000110193D5000-memory.dmp
memory/544-694-0x0000011018090000-0x00000110193D5000-memory.dmp
memory/544-691-0x0000011017890000-0x0000011017891000-memory.dmp
memory/544-695-0x00000110178A0000-0x00000110178A1000-memory.dmp
memory/3524-9-0x0000000000B20000-0x0000000000C28000-memory.dmp
memory/3524-1-0x0000000000B20000-0x0000000000C28000-memory.dmp
memory/3524-641-0x0000000000B20000-0x0000000000C28000-memory.dmp
memory/4088-10-0x0000000000910000-0x0000000000D74000-memory.dmp
memory/4088-639-0x0000000000910000-0x0000000000D74000-memory.dmp
memory/4088-627-0x0000000000910000-0x0000000000D74000-memory.dmp
memory/4088-17-0x0000000001040000-0x0000000001041000-memory.dmp
memory/4088-6-0x0000000001040000-0x0000000001041000-memory.dmp