Analysis

  • max time kernel
    51s
  • max time network
    59s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-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.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 51 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⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3420
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C forfiles /p c:\windows\system32 /m help.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 help.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 ping.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 ping.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 calc.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1748
      • 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 2147735503 /t REG_SZ /d 6"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4576
        • 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:3496
          • \??\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:2300
        • 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 2147814524 /t REG_SZ /d 6"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4244
          • 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:5024
            • \??\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:3540
          • C:\Windows\SysWOW64\forfiles.exe
            forfiles /p c:\windows\system32 /m ping.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:4848
            • 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:1212
              • \??\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:2384
            • C:\Windows\SysWOW64\forfiles.exe
              forfiles /p c:\windows\system32 /m ping.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:3612
              • 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:1916
                • \??\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:3348
              • C:\Windows\SysWOW64\forfiles.exe
                forfiles /p c:\windows\system32 /m calc.exe /c "cmd /C powershell start-process -WindowStyle Hidden gpupdate.exe /force"
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:2676
                • C:\Windows\SysWOW64\cmd.exe
                  /C powershell start-process -WindowStyle Hidden gpupdate.exe /force
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2436
                  • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                    powershell start-process -WindowStyle Hidden gpupdate.exe /force
                    5⤵
                    • Command and Scripting Interpreter: PowerShell
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:5072
                    • C:\Windows\SysWOW64\gpupdate.exe
                      "C:\Windows\system32\gpupdate.exe" /force
                      6⤵
                        PID:4632
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 3420 -s 648
                2⤵
                • Program crash
                PID:2216
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3420 -ip 3420
              1⤵
                PID:1920

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

                    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fij3sn0h.g3w.ps1

                      Filesize

                      60B

                      MD5

                      d17fe0a3f47be24a6453e9ef58c94641

                      SHA1

                      6ab83620379fc69f80c0242105ddffd7d98d5d9d

                      SHA256

                      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                      SHA512

                      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

                    • memory/3420-23-0x0000000010000000-0x00000000105E8000-memory.dmp

                      Filesize

                      5.9MB

                    • memory/5072-14-0x00000000058A0000-0x0000000005BF4000-memory.dmp

                      Filesize

                      3.3MB

                    • memory/5072-3-0x00000000056C0000-0x0000000005726000-memory.dmp

                      Filesize

                      408KB

                    • memory/5072-4-0x0000000005730000-0x0000000005796000-memory.dmp

                      Filesize

                      408KB

                    • memory/5072-2-0x0000000004EE0000-0x0000000004F02000-memory.dmp

                      Filesize

                      136KB

                    • memory/5072-0-0x0000000002480000-0x00000000024B6000-memory.dmp

                      Filesize

                      216KB

                    • memory/5072-15-0x0000000005D60000-0x0000000005D7E000-memory.dmp

                      Filesize

                      120KB

                    • memory/5072-16-0x0000000005E00000-0x0000000005E4C000-memory.dmp

                      Filesize

                      304KB

                    • memory/5072-17-0x0000000006F30000-0x0000000006FC6000-memory.dmp

                      Filesize

                      600KB

                    • memory/5072-18-0x0000000006290000-0x00000000062AA000-memory.dmp

                      Filesize

                      104KB

                    • memory/5072-19-0x00000000062E0000-0x0000000006302000-memory.dmp

                      Filesize

                      136KB

                    • memory/5072-20-0x0000000007580000-0x0000000007B24000-memory.dmp

                      Filesize

                      5.6MB

                    • memory/5072-1-0x0000000004F20000-0x0000000005548000-memory.dmp

                      Filesize

                      6.2MB