Analysis

  • max time kernel
    140s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    01/09/2022, 06:51

General

  • Target

    6a6b2af0716cb8308dddae55dd325253.exe

  • Size

    1.4MB

  • MD5

    6a6b2af0716cb8308dddae55dd325253

  • SHA1

    691556a82280d270bd0f763f1213b43c6c4c0b6d

  • SHA256

    2cb6acd25b8d00468dd89658dc948836f92000e031085b6b3c798eb1504157df

  • SHA512

    e517c7070e4c20eb16acc1dfa98c016a01a9fc66b1944c30e5270d3e616770804553140ff5b3b35c49c659b39e59cf999dc8fa5c00e9520bd57e6c9872d83f11

  • SSDEEP

    24576:BxDQqQS0hvzxBbNLWYhMehi1VH/mUwz9md3Nz1OPSvu+1SHgYxw4d+q:BxQSEbBhMe+VOVBmfxfu+1SH1w40

Malware Config

Extracted

Family

njrat

Version

0.7NC

Botnet

NYAN CAT

C2

4Mekey.myftp.biz:2411

Mutex

18951a269d7

Attributes
  • reg_key

    18951a269d7

  • splitter

    @!#&^%$

Signatures

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 5 IoCs
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Grants admin privileges 1 TTPs

    Uses net.exe to modify the user's privileges.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Windows security modification 2 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 27 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6a6b2af0716cb8308dddae55dd325253.exe
    "C:\Users\Admin\AppData\Local\Temp\6a6b2af0716cb8308dddae55dd325253.exe"
    1⤵
    • UAC bypass
    • Windows security bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Windows security modification
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1832
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\6a6b2af0716cb8308dddae55dd325253.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2020
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\system32\net.exe" user ADMIN~1 SECRET@1234 /add
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1496
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 user ADMIN~1 SECRET@1234 /add
        3⤵
          PID:636
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\system32\net.exe" localgroup administrators ADMIN~1 /add
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1528
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 localgroup administrators ADMIN~1 /add
          3⤵
            PID:1412
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\system32\net.exe" localgroup users "Admin" /add
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:464
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 localgroup users "Admin" /add
            3⤵
              PID:2012
          • C:\Windows\SysWOW64\net.exe
            "C:\Windows\system32\net.exe" localgroup administrators "Admin" /del
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1320
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 localgroup administrators "Admin" /del
              3⤵
                PID:1324
            • C:\Windows\SysWOW64\schtasks.exe
              "C:\Windows\system32\schtasks.exe" /run /tn \Microsoft\Windows\DiskCleanup\SilentCleanup /I
              2⤵
                PID:1056
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Microsoft.NET\Framework\b9xe33Q\svchost.exe" -Force
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1904
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Microsoft.NET\Framework\b9xe33Q\svchost.exe" -Force
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1492
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\6a6b2af0716cb8308dddae55dd325253.exe" -Force
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1616
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\6a6b2af0716cb8308dddae55dd325253.exe" -Force
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1296
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionExtension "exe" -Force
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1408
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\6a6b2af0716cb8308dddae55dd325253.exe" -Force
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:2012
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\EdmGen.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\EdmGen.exe"
                2⤵
                  PID:1772
                • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
                  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
                  2⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:832

              Network

                    MITRE ATT&CK Enterprise v6

                    Replay Monitor

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                    Downloads

                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

                      Filesize

                      7KB

                      MD5

                      64f2556b18e31b1a25f194931eebf4c0

                      SHA1

                      fd8eed8149a90c7535a5f5f723ce18c8c9808d1f

                      SHA256

                      59a44bc4130a029d0bf24605b9db94aee57b0b6805514e5f32b3a9ba18fda82f

                      SHA512

                      5c253bf3aee393365d2108dc5a43f73b81771d45f4ee15ef33dedca90d1ada5b5a9789a14ed32e435d1bd02a6b1463c3ab019ebcfac028d100fbf6902f48c1d3

                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

                      Filesize

                      7KB

                      MD5

                      64f2556b18e31b1a25f194931eebf4c0

                      SHA1

                      fd8eed8149a90c7535a5f5f723ce18c8c9808d1f

                      SHA256

                      59a44bc4130a029d0bf24605b9db94aee57b0b6805514e5f32b3a9ba18fda82f

                      SHA512

                      5c253bf3aee393365d2108dc5a43f73b81771d45f4ee15ef33dedca90d1ada5b5a9789a14ed32e435d1bd02a6b1463c3ab019ebcfac028d100fbf6902f48c1d3

                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

                      Filesize

                      7KB

                      MD5

                      64f2556b18e31b1a25f194931eebf4c0

                      SHA1

                      fd8eed8149a90c7535a5f5f723ce18c8c9808d1f

                      SHA256

                      59a44bc4130a029d0bf24605b9db94aee57b0b6805514e5f32b3a9ba18fda82f

                      SHA512

                      5c253bf3aee393365d2108dc5a43f73b81771d45f4ee15ef33dedca90d1ada5b5a9789a14ed32e435d1bd02a6b1463c3ab019ebcfac028d100fbf6902f48c1d3

                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

                      Filesize

                      7KB

                      MD5

                      64f2556b18e31b1a25f194931eebf4c0

                      SHA1

                      fd8eed8149a90c7535a5f5f723ce18c8c9808d1f

                      SHA256

                      59a44bc4130a029d0bf24605b9db94aee57b0b6805514e5f32b3a9ba18fda82f

                      SHA512

                      5c253bf3aee393365d2108dc5a43f73b81771d45f4ee15ef33dedca90d1ada5b5a9789a14ed32e435d1bd02a6b1463c3ab019ebcfac028d100fbf6902f48c1d3

                    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

                      Filesize

                      7KB

                      MD5

                      64f2556b18e31b1a25f194931eebf4c0

                      SHA1

                      fd8eed8149a90c7535a5f5f723ce18c8c9808d1f

                      SHA256

                      59a44bc4130a029d0bf24605b9db94aee57b0b6805514e5f32b3a9ba18fda82f

                      SHA512

                      5c253bf3aee393365d2108dc5a43f73b81771d45f4ee15ef33dedca90d1ada5b5a9789a14ed32e435d1bd02a6b1463c3ab019ebcfac028d100fbf6902f48c1d3

                    • memory/832-106-0x0000000000400000-0x000000000040C000-memory.dmp

                      Filesize

                      48KB

                    • memory/832-108-0x0000000000400000-0x000000000040C000-memory.dmp

                      Filesize

                      48KB

                    • memory/832-103-0x0000000000400000-0x000000000040C000-memory.dmp

                      Filesize

                      48KB

                    • memory/832-104-0x0000000000400000-0x000000000040C000-memory.dmp

                      Filesize

                      48KB

                    • memory/832-113-0x0000000000400000-0x000000000040C000-memory.dmp

                      Filesize

                      48KB

                    • memory/832-111-0x0000000000400000-0x000000000040C000-memory.dmp

                      Filesize

                      48KB

                    • memory/832-107-0x0000000000400000-0x000000000040C000-memory.dmp

                      Filesize

                      48KB

                    • memory/1296-100-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1296-96-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1408-97-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1408-101-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1492-83-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1492-95-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1616-94-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1616-84-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1832-54-0x0000000000E70000-0x0000000000FDC000-memory.dmp

                      Filesize

                      1.4MB

                    • memory/1832-55-0x00000000043E0000-0x000000000447C000-memory.dmp

                      Filesize

                      624KB

                    • memory/1832-56-0x0000000000420000-0x0000000000436000-memory.dmp

                      Filesize

                      88KB

                    • memory/1832-57-0x0000000076401000-0x0000000076403000-memory.dmp

                      Filesize

                      8KB

                    • memory/1904-82-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/1904-92-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/2012-102-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/2012-99-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/2020-66-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB

                    • memory/2020-98-0x0000000070070000-0x000000007061B000-memory.dmp

                      Filesize

                      5.7MB