Analysis

  • max time kernel
    54s
  • max time network
    102s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29/01/2021, 09:35

General

  • Target
    FileSetup-v17.04.41.exe
  • Size 4.4MB
  • Sample210129-97x41ynnl2
  • SHA256 a8fefe8e1f92a30d1cdd4e2e2afaacf08a02c8961f496ee16e89062417ec5f28
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Nirsoft 6 IoCs
  • Executes dropped EXE 6 IoCs
  • Suspicious Office macro 1 IoCs

    Office document equipped with 4.0 macros.

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Enumerates connected drives 3 TTPs 48 IoCs

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

  • JavaScript code in executable 4 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 3 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Checks SCSI registry key(s) 3 TTPs 12 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 91 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 66 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FileSetup-v17.04.41.exe
    "C:\Users\Admin\AppData\Local\Temp\FileSetup-v17.04.41.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:4760
    • C:\Windows\SysWOW64\msiexec.exe
      msiexec.exe /i "C:\Users\Admin\AppData\Local\Temp\gdiview.msi"
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4292
    • C:\Users\Admin\AppData\Local\Temp\6852B33702F6B3BD.exe
      C:\Users\Admin\AppData\Local\Temp\6852B33702F6B3BD.exe 0011 installp3
      2⤵
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of SetThreadContext
      • Checks SCSI registry key(s)
      • Suspicious use of WriteProcessMemory
      PID:380
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe"
        3⤵
          PID:1812
        • C:\Users\Admin\AppData\Roaming\1611913136958.exe
          "C:\Users\Admin\AppData\Roaming\1611913136958.exe" /sjson "C:\Users\Admin\AppData\Roaming\1611913136958.txt"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:2980
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe"
          3⤵
            PID:4044
          • C:\Users\Admin\AppData\Roaming\1611913141380.exe
            "C:\Users\Admin\AppData\Roaming\1611913141380.exe" /sjson "C:\Users\Admin\AppData\Roaming\1611913141380.txt"
            3⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            PID:4524
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe"
            3⤵
              PID:4476
            • C:\Users\Admin\AppData\Roaming\1611913146396.exe
              "C:\Users\Admin\AppData\Roaming\1611913146396.exe" /sjson "C:\Users\Admin\AppData\Roaming\1611913146396.txt"
              3⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:4016
            • C:\Users\Admin\AppData\Local\Temp\download\ThunderFW.exe
              C:\Users\Admin\AppData\Local\Temp\download\ThunderFW.exe ThunderFW "C:\Users\Admin\AppData\Local\Temp\download\MiniThunderPlatform.exe"
              3⤵
              • Executes dropped EXE
              PID:4568
            • C:\Windows\SysWOW64\cmd.exe
              cmd /c ping 127.0.0.1 -n 3 & del "C:\Users\Admin\AppData\Local\Temp\6852B33702F6B3BD.exe"
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:4660
              • C:\Windows\SysWOW64\PING.EXE
                ping 127.0.0.1 -n 3
                4⤵
                • Runs ping.exe
                PID:2728
          • C:\Users\Admin\AppData\Local\Temp\6852B33702F6B3BD.exe
            C:\Users\Admin\AppData\Local\Temp\6852B33702F6B3BD.exe 200 installp3
            2⤵
            • Executes dropped EXE
            • Writes to the Master Boot Record (MBR)
            • Checks SCSI registry key(s)
            • Suspicious use of WriteProcessMemory
            PID:840
            • C:\Windows\SysWOW64\cmd.exe
              cmd.exe /c taskkill /f /im chrome.exe
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:1776
              • C:\Windows\SysWOW64\taskkill.exe
                taskkill /f /im chrome.exe
                4⤵
                • Kills process with taskkill
                PID:2280
            • C:\Windows\SysWOW64\cmd.exe
              cmd /c ping 127.0.0.1 -n 3 & del "C:\Users\Admin\AppData\Local\Temp\6852B33702F6B3BD.exe"
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:3084
              • C:\Windows\SysWOW64\PING.EXE
                ping 127.0.0.1 -n 3
                4⤵
                • Runs ping.exe
                PID:3544
          • C:\Windows\SysWOW64\cmd.exe
            cmd /c ping 127.0.0.1 -n 3 & del "C:\Users\Admin\AppData\Local\Temp\FileSetup-v17.04.41.exe"
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1144
            • C:\Windows\SysWOW64\PING.EXE
              ping 127.0.0.1 -n 3
              3⤵
              • Runs ping.exe
              PID:1392
        • C:\Windows\system32\msiexec.exe
          C:\Windows\system32\msiexec.exe /V
          1⤵
          • Enumerates connected drives
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3908
          • C:\Windows\syswow64\MsiExec.exe
            C:\Windows\syswow64\MsiExec.exe -Embedding 8BEC64561BE480CF2DB1486CEA018927 C
            2⤵
            • Loads dropped DLL
            PID:2232

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              memory/380-17-0x00000000036B0000-0x0000000003B5F000-memory.dmp

              memory/840-18-0x0000000002D90000-0x000000000323F000-memory.dmp

              memory/1812-21-0x0000000010000000-0x0000000010057000-memory.dmp

              memory/1812-23-0x000001A608420000-0x000001A608421000-memory.dmp

              memory/4044-33-0x0000015B0BC40000-0x0000015B0BC41000-memory.dmp

              memory/4476-42-0x0000029511950000-0x0000029511951000-memory.dmp

              memory/4760-2-0x0000000010000000-0x000000001033C000-memory.dmp