Analysis
- max time kernel
150s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
02/09/2026, 01:22
General
- Target 人事異動に伴う給与調整.exe
- Size 72KB
- Sample260902-brmglsej3w
- SHA256 da169efdf43f4f2e87937efaaaf328dd659e28740411d1904a5bd0908ea5e061
Malware Config
Extracted
-
valleyrat_s2
-
1.0
-
204.194.50.231:449
-
204.194.50.231:443
Signatures
- Family: ValleyRat
ValleyRat stage2 is a backdoor written in C++.
- Detects ValleyRAT payload 14 IoCs
- Executes dropped EXE 5 IoCs
- Loads dropped DLL 19 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates connected drives 3 TTPs 44 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Executes a command shell one-liner 1 TTPs 2 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Modifies registry class 8 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: LoadsDriver 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\人事異動に伴う給与調整.exe"C:\Users\Admin\AppData\Local\Temp\人事異動に伴う給与調整.exe"1⤵
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\explorer.exeexplorer.exe shell:::{A04A25EB-5DF6-46DE-9249-326BBBFD8363}2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\~tmp_99261.tmpC:\Users\Admin\AppData\Local\Temp\~tmp_99261.tmp1⤵
- Executes dropped EXE
-
C:\Windows\explorer.exeC:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\OpenraVPN\Loader.exe"C:\ProgramData\OpenraVPN\Loader.exe" -onlyctrl2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\cmd.execmd.exe /c "C:\ProgramData\OpenraVPN\Loader.exe -reonlyctrl"3⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\OpenraVPN\Loader.exeC:\ProgramData\OpenraVPN\Loader.exe -reonlyctrl4⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
-
-
-
-
C:\ProgramData\OpenraVPN\Loader.exe"C:\ProgramData\OpenraVPN\Loader.exe" -onlyctrl1⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\cmd.execmd.exe /c "C:\ProgramData\OpenraVPN\Loader.exe -reonlyctrl"2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\OpenraVPN\Loader.exeC:\ProgramData\OpenraVPN\Loader.exe -reonlyctrl3⤵
- Executes dropped EXE
- Loads dropped DLL
- Enumerates connected drives
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Loader.exe
libcares-2.dll
msvcp140.dll
vcruntime140.dll
vcruntime140_1.dll
~tmp_99261.tmp
memory/708-31-0x00007FF60A360000-0x00007FF60A379000-memory.dmp
memory/2116-58-0x00000211CDFF0000-0x00000211CE040000-memory.dmp
memory/2116-65-0x00000211CDFF0000-0x00000211CE040000-memory.dmp
memory/2116-59-0x00000211CDFF0000-0x00000211CE040000-memory.dmp
memory/2116-44-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2116-32-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2116-33-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2116-64-0x00000211CDFF0000-0x00000211CE040000-memory.dmp
memory/2116-48-0x00007FF60A360000-0x00007FF60A379000-memory.dmp
memory/2116-37-0x00000211CDFF0000-0x00000211CE040000-memory.dmp
memory/2116-36-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2116-38-0x00000211CDFF0000-0x00000211CE040000-memory.dmp
memory/2116-39-0x00000211CDFF0000-0x00000211CE040000-memory.dmp
memory/2116-16-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2820-47-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2820-56-0x000002C5E16A0000-0x000002C5E16F0000-memory.dmp
memory/2820-43-0x000002C5E16A0000-0x000002C5E16F0000-memory.dmp
memory/2820-40-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2820-41-0x000002C5E16A0000-0x000002C5E16F0000-memory.dmp
memory/2820-35-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2820-49-0x00007FF60A360000-0x00007FF60A379000-memory.dmp
memory/2820-42-0x000002C5E16A0000-0x000002C5E16F0000-memory.dmp
memory/2820-57-0x000002C5E16A0000-0x000002C5E16F0000-memory.dmp
memory/2820-34-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2820-30-0x0000000140000000-0x000000014002A000-memory.dmp
memory/2820-63-0x000002C5E16A0000-0x000002C5E16F0000-memory.dmp
memory/2820-62-0x000002C5E16A0000-0x000002C5E16F0000-memory.dmp
memory/3412-17-0x00007FF60A360000-0x00007FF60A379000-memory.dmp
memory/5112-23-0x00007FF7C2D40000-0x00007FF7C2D59000-memory.dmp