Analysis
- max time kernel
150s - max time network
155s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260618-en - resource tags
- submitted
29/06/2026, 06:14
General
- Target NexiloNitroGen.exe
- Size 17.4MB
- Sample260629-gzk7eaex7v
- SHA256 405d3530a182a08a7c37ee0ee969eae34591a3cb01b5a9bc2d0357a7c62e458c
Malware Config
Extracted
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remus_stealer
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http://myrtler.biz:9549
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http://carogra.biz:4219
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http://youngel.biz:8768
Signatures
- Family: Remus
Remus is a stealer written in C++.
- Downloads MZ/PE file 1 IoCs
- Sets service image path in registry 3 TTPs 2 IoCs
This determines the executable launched when a service starts. It can be used to establish persistence.
- Executes dropped EXE 12 IoCs
- Loads dropped DLL 23 IoCs
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Suspicious use of SetThreadContext 2 IoCs
- Detects Pyinstaller 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Modifies registry class 2 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: LoadsDriver 4 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of UnmapMainImage 1 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Windows\system32\sihost.exesihost.exe1⤵
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\NexiloNitroGen.exe"C:\Users\Admin\AppData\Local\Temp\NexiloNitroGen.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c9xgyvlb.exe"C:\Users\Admin\AppData\Local\Temp\c9xgyvlb.exe"3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\798ke5kk.exe"C:\Users\Admin\AppData\Local\Temp\798ke5kk.exe"3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\798ke5kk.exe"C:\Users\Admin\AppData\Local\Temp\798ke5kk.exe"4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c cls5⤵
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C:\Users\Admin\AppData\Local\Temp\c0ty53ba.exe"C:\Users\Admin\AppData\Local\Temp\c0ty53ba.exe"3⤵
- Downloads MZ/PE file
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ojipmbif.exe"C:\Users\Admin\AppData\Local\Temp\ojipmbif.exe"4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\notepad.exeC:\Windows\system32\notepad.exe5⤵
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C:\Users\Admin\AppData\Local\Temp\bmzwjanu.exe"C:\Users\Admin\AppData\Local\Temp\bmzwjanu.exe"4⤵
- Executes dropped EXE
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C:\Windows\system32\notepad.exeC:\Windows\system32\notepad.exe4⤵
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C:\Users\Admin\AppData\Local\Temp\6v8x042c.exe"C:\Users\Admin\AppData\Local\Temp\6v8x042c.exe"3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\6v8x042c.exe"C:\Users\Admin\AppData\Local\Temp\6v8x042c.exe"4⤵
- Executes dropped EXE
- Loads dropped DLL
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵
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C:\Windows\System32\RuntimeBroker.exeC:\Windows\System32\RuntimeBroker.exe -Embedding1⤵
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C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe"C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe"1⤵
- Sets service image path in registry
- Executes dropped EXE
- Suspicious behavior: LoadsDriver
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Services\winhost.exeC:\Users\Admin\AppData\Roaming\Microsoft\Windows\Services\winhost.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\EmbeddedDriverService.sysC:\Users\Admin\AppData\Local\Temp\EmbeddedDriverService.sys1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe"C:\Users\Admin\AppData\Local\Temp\WinSysKdrv.exe"1⤵
- Sets service image path in registry
- Executes dropped EXE
- Suspicious behavior: LoadsDriver
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Replay Monitor
Loading Replay Monitor...
Downloads
6v8x042c.exe
798ke5kk.exe
EmbeddedDriverService.sys
WinSysKdrv.exe
VCRUNTIME140.dll
_bz2.pyd
_ctypes.pyd
_lzma.pyd
_zstd.pyd
base_library.zip
python314.dll
VCRUNTIME140.dll
_bz2.pyd
_ctypes.pyd
_hashlib.pyd
_lzma.pyd
_queue.pyd
_socket.pyd
_ssl.pyd
base_library.zip
md.cp313-win_amd64.pyd
md__mypyc.cp313-win_amd64.pyd
libcrypto-3.dll
libffi-8.dll
libssl-3.dll
python313.dll
select.pyd
unicodedata.pyd
c0ty53ba.exe
c9xgyvlb.exe
ojipmbif.exe
memory/2844-220-0x00007FFC3BAA0000-0x00007FFC3BD03000-memory.dmp
memory/2992-312-0x0000000140000000-0x000000014003B000-memory.dmp
memory/3112-172-0x000001810FFE0000-0x000001810FFE3000-memory.dmp
memory/3112-178-0x000001810FFF0000-0x000001810FFF7000-memory.dmp
memory/3700-232-0x0000000003730000-0x0000000003731000-memory.dmp
memory/3700-176-0x00000000036F0000-0x00000000036F7000-memory.dmp
memory/3700-188-0x0000000003710000-0x0000000003711000-memory.dmp
memory/4400-180-0x000001FFD7380000-0x000001FFD7387000-memory.dmp
memory/4436-182-0x00000141AAC60000-0x00000141AAC67000-memory.dmp
memory/4600-265-0x0000000140000000-0x000000014003A000-memory.dmp
memory/6200-125-0x00007FFC3BAA0000-0x00007FFC3BD03000-memory.dmp