Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    28/09/2026, 03:41

General

  • Target
    115Q3申報清單.exe
  • Size 343KB
  • Sample260928-d8ty5avyht
  • SHA256 6d3fee81ad1339b8e9a2ae7d24669fc9ad9ec84c3b13932289fb20a25bce5596
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • valleyrat_s2

Version
  • 1.0

C2
  • 108.187.43.208:449

  • 108.187.43.208:443

Signatures

  • Family: ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Detects ValleyRAT payload 6 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 15 IoCs
  • 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.

  • Modifies registry class 8 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: LoadsDriver 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\115Q3申報清單.exe
    "C:\Users\Admin\AppData\Local\Temp\115Q3申報清單.exe"
    1⤵
    • Modifies registry class
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Windows\explorer.exe
      explorer.exe shell:::{712FE367-ECCC-42AD-8E0E-1015F088FD60}
      2⤵
        PID:5708
    • C:\Users\Admin\AppData\Local\Temp\~tmp_36462.tmp
      C:\Users\Admin\AppData\Local\Temp\~tmp_36462.tmp
      1⤵
      • Executes dropped EXE
      PID:1284
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4276
      • C:\ProgramData\OpenraVPN\Loader.exe
        "C:\ProgramData\OpenraVPN\Loader.exe"
        2⤵
        • Adds Run key to start application
        • Enumerates connected drives
        • Executes dropped EXE
        • Loads dropped DLL
        • Reads the TCP/IP host and domain name from the registry
        PID:1892
    • C:\Users\Admin\AppData\Local\Temp\~tmp_17468.tmp
      C:\Users\Admin\AppData\Local\Temp\~tmp_17468.tmp
      1⤵
      • Executes dropped EXE
      PID:2196
    • C:\ProgramData\OpenraVPN\Loader.exe
      "C:\ProgramData\OpenraVPN\Loader.exe"
      1⤵
      • Enumerates connected drives
      • Executes dropped EXE
      • Loads dropped DLL
      • Reads the TCP/IP host and domain name from the registry
      PID:5516
    • C:\Users\Admin\AppData\Local\Temp\~tmp_94002.tmp
      C:\Users\Admin\AppData\Local\Temp\~tmp_94002.tmp
      1⤵
      • Executes dropped EXE
      PID:4376

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          DriverLib.dll

          • Path C:\ProgramData\OpenraVPN\DriverLib.dll
          • Size 387KB
          • SHA256 d1f93def665db5c4debf60314af20c13f054913bed2241dd370bb20b43245f5c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          Loader.exe

          • Path C:\ProgramData\OpenraVPN\Loader.exe
          • Size 343KB
          • SHA256 6d3fee81ad1339b8e9a2ae7d24669fc9ad9ec84c3b13932289fb20a25bce5596
          • MD5 SHA1 SHA512 SSDEEP TLSH

          appshare.dll

          • Path C:\ProgramData\OpenraVPN\appshare.dll
          • Size 251KB
          • SHA256 339cef1ca6daa65126507c76b5ff93540d4696329370750129039b760455af6b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          mediastores.dll

          • Path C:\ProgramData\OpenraVPN\mediastores.dll
          • Size 248KB
          • SHA256 02f7f062d9065e15b064afd94137da0723ac19db953733800ea3a04394ba44b5
          • MD5 SHA1 SHA512 SSDEEP TLSH

          msvcp140.dll

          • Path C:\ProgramData\OpenraVPN\msvcp140.dll
          • Size 553KB
          • SHA256 3048df1cf8d476e998dde28ed6b67856b47ec5ae2b2c221fb1733f43c550c701
          • MD5 SHA1 SHA512 SSDEEP TLSH

          util.dll

          • Path C:\ProgramData\OpenraVPN\util.dll
          • Size 1.4MB
          • SHA256 889c8747e20356a83f7e81c1206de869beeed3707408716656ab5b5a14451044
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vcruntime140.dll

          • Path C:\ProgramData\OpenraVPN\vcruntime140.dll
          • Size 108KB
          • SHA256 9593801b89cf3c0a46056f4d923d67b5c685fb8760f007b4d194e4a6a6ed9396
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vcruntime140_1.dll

          • Path C:\ProgramData\OpenraVPN\vcruntime140_1.dll
          • Size 38KB
          • SHA256 b49a9b9c334e66bb14e0bd784be2e0a86edc7d24a9ebf90d1b2bbd71451695c9
          • MD5 SHA1 SHA512 SSDEEP TLSH

          ~tmp_36462.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\~tmp_36462.tmp
          • Size 285KB
          • SHA256 09761bfc8230d1443f7f804c4ebac5d97010ee1ca76478510407fc7adc712e3c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/1892-27-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/1892-31-0x0000021963010000-0x0000021963060000-memory.dmp

          memory/1892-28-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/1892-14-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/1892-29-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/1892-30-0x0000021963010000-0x0000021963060000-memory.dmp

          memory/1892-32-0x0000021963010000-0x0000021963060000-memory.dmp

          memory/1892-40-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/5516-33-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/5516-34-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/5516-35-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/5516-36-0x00000248FB5E0000-0x00000248FB630000-memory.dmp

          memory/5516-38-0x00000248FB5E0000-0x00000248FB630000-memory.dmp

          memory/5516-37-0x00000248FB5E0000-0x00000248FB630000-memory.dmp

          memory/5516-26-0x0000000140000000-0x000000014002A000-memory.dmp

          memory/5516-41-0x0000000140000000-0x000000014002A000-memory.dmp