Analysis

  • user interaction
    yes
  • max time kernel
    900s
  • max time network
    425s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260130-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260130-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    03/05/2026, 17:43

General

  • Target
    Grimoire.exe
  • Size 4.3MB
  • Sample260503-waz2laat6n
  • SHA256 ba56caef6dc6f01435232a689bf44bb37aef36f36daa3a4acad161cb41b3c6f5
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
3/10

Malware Config

Signatures

  • Program crash 2 IoCs
  • 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.

  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Grimoire.exe
    "C:\Users\Admin\AppData\Local\Temp\Grimoire.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2540
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2540 -s 868
      2⤵
      • Program crash
      PID:4948
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2540 -ip 2540
    1⤵
      PID:5072
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {24AC8F2B-4D4A-4C17-9607-6A4B14068F97} -Embedding
      1⤵
        PID:2316
      • C:\Windows\System32\rundll32.exe
        C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
        1⤵
          PID:3592
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe"
          1⤵
          • Suspicious use of WriteProcessMemory
          PID:3392
          • C:\Users\Admin\AppData\Local\Temp\Grimoire.exe
            Grimoire.exe
            2⤵
            • System Location Discovery: System Language Discovery
            PID:5556
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 5556 -s 836
              3⤵
              • Program crash
              PID:4552
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 5556 -ip 5556
          1⤵
            PID:5168

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

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                Downloads

                memory/2316-2-0x000001EB16EC0000-0x000001EB16F15000-memory.dmp

                memory/2540-0-0x0000000000B30000-0x0000000000F7A000-memory.dmp

                memory/2540-1-0x0000000005FF0000-0x0000000006596000-memory.dmp

                memory/3592-3-0x0000015028EA0000-0x0000015028EF5000-memory.dmp